最新刊期
卷 50 ， 期 5 ， 2025
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摘要：The excessive utilization of fossil energy has increased CO2 emissions year by year. Photothermal catalytic CO2 methanation is expected to provide a solution for the recycling of carbon resources. Photothermal catalytic CO2 methanation combines the advantages of photocatalysis and thermocatalysis, breaking through the low-temperature kinetic limitations by reducing the activation energy barrier and the reaction temperature to achieve efficient catalytic conversion of CO2. Ni-based catalysts are used for photothermal catalytic CO2 methanation due to it high activity and low cost. Firstly, the reaction mechanism and reaction path of photothermal catalytic CO2 methanation were introduced. Then, the regulation mechanism of different supports on the catalytic performance of Ni-based catalysts for photothermal catalytic CO2 methanation was studied. Finally, the research progress on the new monoatomic Ni-based catalysts was reviewed, can provide ideas for the design and development of catalysts for photothermal CO2 methanation reaction.关键词：Ni-based catalysts;photothermal catalysis;CO2 methanation;catalytic performance;supports71|0|0更新时间：2025-05-29 -
摘要：CO2 hydrogenation to produce ethanol and other advanced products is one of the important ways to realize the resource utilization of CO2. Pd2/CeO2 catalyst is one of the ideal catalysts for CO2 hydrogenation to ethanol. The simulation methods can provide a more intuitive representation of the reaction process. The influence of oxygen vacancy (OV) and H2O on the CO2 hydrogenation process on Pd2/CeO2 catalyst was studied and analyzed by density functional theory (DFT). The results show that compared to clean catalyst surfaces, OV promotes CO2 adsorption and activation. In addition, OV also changes the electronic state between the support and the supported Pd, allowing Pd to provide more electrons to the C species, which is beneficial for subsequent C—O bond cleavage and C—C bond coupling reactions. However, when H2O is present on the surface of the catalyst, due to the high electronegativity of O species and H2O competes with CO2 and its derivatives for electrons, resulting in a decrease in the electron density of C species, which is not conducive to the cleavage of C—O bonds and the coupling of C—C bonds, thereby increasing the reaction energy barriers for ethanol generation.关键词：CO2;ethanol;oxygen vacancy;H2O;DFT calculation32|0|0更新时间：2025-05-29 -
摘要：Graphitic carbon nitride (g-C3N4) is one of the ideal catalysts for photocatalytic CO2 reduction. However, the application of g-C3N4 is limited due to the rapid recombination of photogenerated carriers. The mixture of melamine and B2O3 was treated by hydrothermal method, and then a series of B-modified g-C3N4 (x-B-HCN, x is the molar ratio of B2O3 and melamine) was prepared by calcining the hydrothermal reaction product. The crystal structures and functional groups of x-B-HCN were characterized by XRD and FT-IR, etc. And the photocatalytic performance and corresponding reaction mechanism of x-B-HCN for CO2 reduction to CO were studied. The results show that x-B-HCN has large specific surface area (11.8 m2/g to 24.6 m2/g), thus exhibiting strong CO2 adsorption performances. Under irradiation by 300 W xenon lamp with 400 nm cut-off filter for 5 h, 0.20-B-HCN exhibits the best photocatalytic performance with CO generation rate of 6.88 μmol/(g·h), which is 5.54 times greater than that of g-C3N4 (1.24 μmol/(g·h)) obtained by one-step calcination method and 3.97 times greater than that of HCN-1 (1.73 μmol/(g·h)) without B modification. Irradiation for 5 h in the third cycle under the same conditions, the CO generation rate of 0.20-B-HCN is 6.53 μmol/(g·h), which indicates that 0.20-B-HCN has fairly high stability. The pathway of photocatalytic CO2 reduction to CO by x-B-HCN is as follows: CO2 → COOH* → CO* → CO.关键词：photocatalytic;CO2 reduction;graphitic carbon nitride;B modification179|0|0更新时间：2025-05-29 -
摘要：The catalytic hydrogenation of CO2 to C2+ alcohols (alcohols with two or more carbon atoms) is one of the important pathways for the high-value utilization of CO2 and the achievement of “carbon peak and carbon neutrality”, and the construction of catalysts is the key to achieve high activity and stability in CO2 hydrogenation to C2+ alcohols. To investigate the effects of Mn additive on structures of KFeCuZn catalysts and their catalytic performances for CO2 hydrogenation to C2+ alcohols (hereinafter referred to as “catalytic performances”), KFeCuZnMnx catalysts with different Mn addition amounts were prepared by co precipitation method, and they were characterized by XRD, XPS, SEM, N2 physical adsorption/desorption, H2-TPR and CO2-TPD. The catalytic performances of KFeCuZnMnx catalysts were tested under reaction conditions of 300 ℃, 3 MPa, V(CO2):V(H2):V(Ar) = 20:60:10, and space velocity of 1800 h-1. The results show that Mn acts as structural additive, and moderate addition of Mn can cause varying degrees of metal to metal interactions with other metals, so as to affect the specific surface areas and particle sizes of catalysts. At the same time, Mn, as electronic additive, undergoes electron transfer between Fe, and forms Fe-Mn-O active phase, which affects the reduction performances of catalysts and effectively improves their catalytic performances. KFeCuZnMn1.8 catalyst has good metal dispersibility and a large specific surface area, which can expose more effective active sites. Its CO2 conversion rate reaches 40.1%, and total alcohol selectivity reaches 20.3%, and the proportion of C2+ alcohols in the total alcohols (mass fraction) is as high as 95.6%. Therefore, by precisely controlling the addition amount of Mn, the catalyst structures can be effective regulated, thereby increasing the C2+ alcohol selectivity.关键词：CO2 hydrogenation;C2+ alcohols;Mn additive;structural additive;electronic additive117|0|0更新时间：2025-05-29 -
摘要：Propane dehydrogenation (PDH) to propylene is an economical process. However, PDH faces challenges including low propane conversion and high Cr loading capacity in the catalyst, which contributes the environment pollution. To address these issues, a series of cerium-zirconium oxides with n(Ce):n(Zr) were synthesized by evaporation-induced self-assembly, and the corresponding catalysts were prepared by equal volume impregnation method and loaded with Cr, and CO2 oxidative dehydrogenation of propane (CO2-OPDH) was explored as an alternative route for propylene production. The catalysts were characterized by XRD, N2 adsorption/desorption, SEM, TEM and XPS. The results show that all catalysts form homogeneous cerium-zirconium solid solution with specific surface areas exceeding 70 m2/g and mesoporous structure. With the decrease of n(Ce):n(Zr), n(Cr3+):(n(Cr3+) + n(Cr6+) in the catalyst gradually increases, which enhances its catalytic performance. All catalysts have high initial propane conversion rate and propylene selectivity. With the increase of n(Ce):n(Zr), the initial conversion rate of propane decreases gradually. The catalyst with n(Ce):n(Zr) of 1:9 exhibits initial propane conversion of 53% and propylene selectivity (when the reaction reaches stability ) close to 90% at 600 ℃, 0.1 MPa and propane space velocity of 200 h-1. The catalyst with n(Ce):n(Zr) of 5:5 achieves a propane initial conversion rate comparable to that of industrial catalysts. Regeneration cycle test reveals that the catalyst with n(Ce):n(Zr) = 1:9 exhibits good stability, which provides valuable insights for the development of low-Cr loading capacity propane dehydrogenation catalysts. .关键词：propane;CO2;propane oxidative dehydrogenation;propylene;cerium-zirconium solid solution;Cr-based catalysts117|0|0更新时间：2025-05-29 -
摘要：The global warming caused by large amount of CO2 emissions has attracted wide attention. How to reduce CO2 emissions and transform it into high value-added chemicals has become a research hotspot. A series of UiO-66-SH-X were synthesized using 2-mercaptobenzoic acid (MBA) and terylene acid (H2BDC) as ligands, and then UiO-66-SO3H-X (X = n(MBA):(n(H2BDC) + n(MBA))) were prepared by H2O2 oxidation. The effects of n(MBA):(n(H2BDC) + n(MBA)) on the physical and chemical properties, catalytic performance and reusability of UiO-66-SO3H-X were studied. The results show that UiO-66-SO3H-X has great crystal structure. The specific surface area and average pore size of UiO-66-SO3H-X decrease rapidly with the increase of n(MBA):(n(H2BDC) + n(MBA)). Compared with UiO-66, UiO-66-SO3H-X has better catalytic performance and UiO-66-SO3H-0.3 shows the best catalytic performance. Under the condition of temperature of 140 ℃, CO2 pressure of 3.5 MPa , catalyst dosage of 0.1 g and reaction time of 8 h, the yield of DMC is 0.92%, which is 2.83 times higher than that of UiO-66. UiO-66-SO3H-0.3 has great hydrothermal stability, and the activity ratio (the ratio of DMC yield after three cycles to fresh catalyst DMC yield ) can remain 92.6% after three catalytic reaction cycles.关键词：CO2;dimethyl carbonate;UiO-66;linker defect;acid site55|0|0更新时间：2025-05-29 -
摘要：Methane dry reforming is a reaction that utilizes two greenhouse gas (CH4 and CO2) to generate high value-added syngas, which is of great significance for mitigating greenhouse gas emissions and enhancing the utilization of CH4 and CO2. Ni-based catalysts are the common used catalysts in methane dry reforming reaction, but they suffer from problems such as carbon deposition and sintering, which can lead to catalyst deactivation. Due to the large specific surface area and adjustable acidity and composition, hydrotalcite-derived Ni-based catalysts are widely used in methane dry reforming reaction. Firstly, the mechanism of methane dry reforming reaction and deactivation mechanism of catalysts were systematically discussed. Next, the synthesis of hydrotalcite-derived Ni-based catalysts and their application in methane dry reforming reaction were comprehensively illustrated, and the effect of the compositions, additive components and preparation methods and conditions on the resistance to carbon deposition and sintering performance of hydrotalcite-derived Ni-based catalysts were analyzed. Finally, from the aspects of Ni-based nano/single atom catalysts, few-/mono-layered hydrotalcite-derived Ni-based catalysts and hydrotalcite-derived Ni-based multi-functional catalysts, the research direction of hydrotalcite-derived Ni-based catalysts in methane dry reforming reaction were proposed, which can provide further insightful guidance for the development of efficient and stable Ni-based nano/subnano-catalysts for the catalytic conversion of C1 molecules (CH4, CO2, etc.).关键词：methane dry reforming;syngas;hydrotalcite;Ni-based catalysts76|0|0更新时间：2025-05-29 -
摘要：In order to cope with global climate change and promote sustainable development, the dry reforming of methane (CH4) and carbon dioxide (CO2) (DRM) has become an important development direction of chemical industry because of its unique environmental protection and economic benefits. This technology can not only effectively reduce greenhouse gas emissions, but also transform CH4 and CO2 into high-value chemical raw materials, providing high-quality synthesis gas for industrial applications such as Fischer-Tropsch synthesis, which has important practical significance in environmental protection and resource utilization. The related literatures about DRM at home and abroad were counted, and the reaction mechanism and thermodynamics of DRM were discussed. The types and research progress on DRM catalysts were summarized from the aspects of adding metal additives and controlling the interaction between carriers, and the existing problems of DRM technology were analyzed and corresponding improvement measures were put forward in view of the existing problems. It is found that the number of literatures related to DRM has increased year by year since 2000, with a slight decline in recent two years, and the research content and direction are more in-depth and diversified. The existing catalysts have some problems such as high cost, easy carbon deposition and sintering, which can be optimized by adding appropriate additives, nitrogen doping, activated carbon modification and so on. However, DRM reaction needs high temperature to be carried out effectively, which increases the energy consumption and needs strict equipment requirements, and the gas flow rate, pressure and n(CH4)/n(CO2) in the reaction process have a significant impact on the reaction efficiency. In future research, more attention should be paid to development and optimization of green, sustainable and high-performance DRM catalysts and reactors.关键词：methane;carbon dioxide;dry reforming technology;reaction mechanism;catalyst289|0|0更新时间：2025-05-29 -
摘要：To address the issue that the traditional thermal catalytic conversion of CH4 and CO2 requires high temperature and high pressure and achieve the efficient utilization of two greenhouse gases, non-thermal plasma technology can be used to directly convert CH4 and CO2 to high-value chemicals (methanol, ethanol and acetic acid, etc.) at room temperature and atmospheric pressure. The regulation of reaction gas conversion rates and product distributions by reaction gas n(CO2):n(CH4), total reaction gas flow rates and discharge powers was investigated, and the effects of catalysts on the performances of reaction system were studied. The results show that when the n(CO2):n(CH4) is 3:1, and total reaction gas flow rate is 40 mL/min, and discharge power is 25 W, the selectivity of oxygenates is 75%, and the selectivity of acetic acid is 47%. When Cu catalyst is used, the selectivity of propanoic acid can reach 36%. When ZnO catalyst is used, the selectivity of oxygenates increases to 92%, and the selectivity of the main product methyl formate reaches 37%. The larger the reaction gas n(CO2):n(CH4), the more favorable it is for the reaction gas conversion and formation of acetic acid. The smaller the total reaction gas flow rate, the larger the conversion rate of reaction gas. The larger the discharge power, the larger the conversion rate of reaction gas, but excessive discharge power will lead to a decrease in selectivity of oxygenates. The use of catalysts in this reaction system can generate new products with greater economic value.关键词：methane;carbon dioxide;catalyst;non-thermal plasma;oxygenates80|0|0更新时间：2025-05-29 -
摘要：Fischer-Tropsch synthesis (FTS) is a reaction that converts syngas into liquid fuels and high value-added chemicals. The product distribution of Fischer-Tropsch synthesis follows the Anderson-Schulz-Flory (ASF) distribution, so the regulation of product distribution is a challenge. Fe-based Fischer-Tropsch synthesis catalysts could selectively prepare olefins, which is one of the most commonly used catalysts in Fischer-Tropsch synthesis. ZSM-5 molecular sieve presents great performance of olefin oligomerization, alkylation and aromatization, and is therefore often used for product regulation at the downstream end of Fischer-Tropsch synthesis. The reaction products of syngas under the coupling of Fe-based catalyst and ZSM-5 bi-functional catalyst are mainly C1~C15 hydrocarbons, with low selectivity of hydrocarbons of jet fuel, which limits its application in aviation fuel production. The catalysts before and after reaction were characterized by XRD, N2 adsorption/desorption, SEM, Mössbauer, TEM, H2-TPR, NH3-TPD and so on. A new strategy of synthesis of aromatics of jet fuel by coupling of CO hydrogenation and toluene alkylation reaction was proposed. The results show that under the reaction temperature of 260 ℃, pressure of 2.0 MPa, V(H2)/V(CO) = 1, reaction space velocity of 1500 mL/(g·h) and toluene space velocity of 0.4 h-1, with Na-Fe + ZSM-5 catalyst, syngas undergoes the Fischer-Tropsch synthesis reaction on the Fe-based catalyst to generate low-carbon (C2~C4) olefins, and subsequently the in situ formed low-carbon olefins undergo alkylation reactions with toluene on the acidic sites of ZSM-5 to produce aromatics of jet fuel. The main components of C8~C16 hydrocarbon products are aromatics, accounting for 72% (mole fraction), which demonstrates that synthesis of aromatics of jet fuel by the coupling of CO hydrogenation and toluene alkylation reaction with tandem catalyst is feasible.关键词：CO hydrogenation;Fe-based catalyst;alkylation;ZSM-5;aromatics24|0|0更新时间：2025-05-29 -
摘要：One of important ways to achieve clean and efficient utilization of coal is through Fischer-Tropsch synthesis (FTS) to prepare high value-added chemicals via CO hydrogenation. However, while generating hydrocarbons, a large amount of H2O is also produced as by-product. H2O will oxidize the active center, leading to a decrease in reaction rate, and promote the water gas shift (WGS) reaction, generating a large amount of CO2 and reducing the efficiency of carbon utilization. At the same time, the primary olefins in the FTS products are easy to be re-adsorbed for secondary hydrogenation reactions, decreasing the selectivity of olefins. Based on the characteristics of the FTS product distribution, the control of products can be achieved by adjusting the surface hydrophilicity of Fe-based catalysts. Fe3O4@SiO2 catalysts with different shell thicknesses were produced by solvothermal method and Stöber methods, and Fe3O4@SiO2-3-PFTS catalyst with hydrophobic and oleophobic (hereinafter referred to as “amphiphobic”) properties were prepared by perfluorodecyltriethoxysilane (PFTS) as a modifier. The effects of the shell thickness and amphiphobic modification on the catalyst activity and FTS product distribution were investigated. The catalysts were characterized by SEM, TEM, FT-IR, XRD, H2-TPR and so on, and their catalytic performances were tested under the conditions of 300 ℃, 1.5 MPa, gas space velocity of 3000 h-1 and V(H2):V(CO) = 2:1. The results show that the prepared catalysts have complete core-shell structures and uniform shell thickness. Fe3O4@SiO2-3-PFTS catalyst exhibits good amphiphobic properties. With the increase of the thickness of SiO2 shell layer, the secondary hydrogenation reaction of primary olefins is enhanced, and the generation of heavy hydrocarbons is significantly inhibited. The selectivity of alkanes with two to four carbon atoms ( -
摘要：CO2 hydrogenation to methanol catalyzed by cheap CuZnAl catalyst is one of the potential ways to save energy, reduce emission and alleviate energy shortage. However, the methanol selectivity and stability of the catalyst are still low. The CuZnAl catalyst (CZ-MIL) was prepared by impregnation method using MIL-68(Al), a metal-organic framework material with high specific surface area and stability, as the carrier. And then the acid-base property of CZ-MIL was regulated by alkali promoters NaOH, 2,6-pyridine dicarboxylic acid (PDA) and sodium tetrborate (Na2B4O7), respectively. The effect of alkali promoters on catalytic performances and structures of the catalysts for CO2 hydrogenation to methanol was studied. The results show that the introduction of weak alkaline agent Na2B4O7 has a relatively good adjustment effect on acid-base property of the catalyst. Under the reaction conditions of V(H2):V(CO2) of 3:1 in raw gas, total flow rate of raw gas of 100 mL/min, temperature of 250 ℃ and pressure of 3 MPa for 168 h, the methanol selectivity, CO2 conversion rate and methanol space-time yield of the catalyst are 54.94%, 2.94% and 29.54 mg/(mL·h), respectively.关键词：CO2 hydrogenation;methanol;CuZnAl catalyst;base promoters;acid-base coordination180|0|0更新时间：2025-05-29 -
摘要：To solve the defects of corrosion on stainless steel equipment with halogen-containing copper catalysts in the one-step oxidation of liquid methanol to synthesize dimethoxymethane, halogen-free activated carbon loaded copper (Cu/AC) catalysts were prepared by equal volume impregnation method. The catalytic performance of Cu/AC catalysts for the one-step oxidation of liquid-phase methanol to dimethoxymethane was investigated. The physicochemical properties of the Cu/AC catalysts were characterized by N2 adsorption/desorption, XRD, XPS, TEM and H2-TPR. The effects of Cu loadings and calcination temperatures on the structure and catalytic performance of Cu/AC catalysts were investigated. The results show that when the Cu loading (mass fraction) is 5% and the calcination temperature is 200 ℃, the Cu particles are dispersed uniformly on the surface of the activated carbon with the smallest particle size (12.0 nm) and Cu0 and Cu+ contents are the highest and the catalyst shows the best catalytic performance. The methanol conversion and dimethoxymethane selectivity are 8.1% and 92.7%, respectively, under the conditions of temperature of 130 ℃ and O2 pressure of 3 MPa. Among them, the selectivity of dimethoxymethane increases from 93.9% in the first cycle to 100.0% after 5 cycles of 5Cu/AC-200 catalyst.关键词：halogen-free copper catalyst;activated carbon;dimethoxymethane;one-step oxidation synthesis106|0|0更新时间：2025-05-29 -
摘要：CO2 chemical conversion is beneficial for CO2 emission reduction to reduce the greenhouse effect, and CO2 hydrogenation to methanol can make up for the future energy gap to a certain extent. At present, the development of high-performance catalysts has become a key target for the development of CO2 hydrogenation to methanol technology. x Zn-ZrO2 with different n(Zn)/n(Zr) and y Zr-ZnO with different n(Zr)/n(Zn) catalysts were synthesized by impregnation method, using ZnZr catalyst as the research object, and the catalysts were characterized by XRD, N2 adsorption/desorption, XPS, H2-TPR, insitu DRIFTS and so on. The results show that 0.50 Zn-ZrO2 catalyst (n(Zn)/n(Zr) = 0.50) among x Zn-ZrO2 catalysts has the highest methanol space time yield with 141 mg/(g·h) at 320 ℃ and 5 MPa. 0.20 Zr-ZnO (n(Zr)/n(Zn) = 0.20) among y Zr-ZnO catalysts has highest methanol space time yield with 165 mg/(g·h) under the same test conditions. In x Zn-ZrO2 catalysts, there are electron interactions between Zn and Zr, resulting in the formation of electron-rich Zn sites and electron-deficient Zr sites, and more electrons are transferred from Zr to Zn, which is beneficial for improving methanol selectivity and space time yield. In y Zr-ZnO catalysts, surface adsorbed oxygen becomes a key factor affecting CO2 conversion rate. In addition, the HCOO* intermediate species play a key role. It is confirmed that in the CO2 hydrogenation to methanol catalyzed by x Zn-ZrO2 and y Zr-ZnO catalysts, the more HCOO* species there are, the more favorable it is for methanol synthesis.关键词：CO2 hydrogenation;methanol;ZnZr catalyst;electron interaction;reaction mechanism170|0|0更新时间：2025-05-29 -
摘要：CO2 hydrogenation to methanol (CH3OH) not only reduces CO2 emissions but also relieves energy shortage, which is considered one of the effective means to achieve “carbon neutrality”. Cu/ZnO/Al2O3 (CZA) catalysts are widely used in CH3OH synthesis due to their low cost and high catalytic activity and their component structure and surface characteristics have a significant impact on catalytic performance. In order to investigate the effect of n(Cu)/n(Zn) on the physicochemical properties and catalytic performance of CZA catalysts, a series of CZA catalysts with different n(Cu)/n(Zn) were prepared by coprecipitation-calcination method and characterized by XRD, SEM, HRTEM, XPS, ICP-MS, H2-TPR, CO2-TPD and other characterization methods, and they were used for catalytic CO2 hydrogenation to CH3OH reaction. The results indicate that the n(Cu)/n(Zn) affects the physicochemical properties of catalysts, such as Cu particle size, specific surface area, ratio of numbers of Cu0 and Cu+ (N(Cu0)/N(Cu+)) on the surface, reducibility and surface alkalinity. The Cu particle size of CZA-R-2 (n(Cu)/n(Zn) is 2) is 5.32 nm, and the specific surface area is 53.5 m2/g, and the surface N(Cu+)/N(Cu0) is 0.9. At 220 ℃, 2 MPa and volume space velocity of 7500 mL/(h·g), CZA-R-2 exhibits the best CO2 conversion rate (15.5%) and CH3OH selectivity (67.0%). At the same time, the CH3OH yield reaches 10.4%. In addition, CZA-R-2 runs smoothly for over 200 h under the same conditions and shows good stability.关键词：Cu/ZnO/Al2O3 catalyst;CO2 hydrogenation;methanol;n(Cu)/n(Zn)79|0|0更新时间：2025-05-29 -
摘要：The design and development of high efficiency hydrogenation catalysts is the key to promote the relate application of hydrogenation reaction. Diatomic catalysts have become the research hotspot in hydrogenation catalysts because of their synergistic active sites and strong interactions between diatoms. The research progress on application of diatomic catalysts in hydrogenation reactions were reviewed, and the regulatory mechanisms affecting the catalytic performances of diatomic catalysts in hydrogenation reactions were summarized, and the challenges and future development of diatomic catalysts in hydrogenation reactions were analyzed and prospected.关键词：diatomic catalysts;hydrogenation reactions;interaction;regulation mechanism150|0|0更新时间：2025-05-29 -
摘要：In order to address the issue of significant CO2 emissions during the water-gas shift to produce hydrogen, iron-calcium-based dual-functional materials can be utilized for in situ CO2 adsorption, enhancing the efficiency of hydrogen production and decarbonization in water-gas shift reaction. Fex/CaO-MAM samples (x = n(Ca)/n(Fe)) with elements derived from steel slag were prepared by co-precipitation method. The phase compositions, textural properties, alkalinities, numbers of alkaline sites and CO2 adsorption properties of the samples were characterized by XRD, N2 physical adsorption/desorption, CO2-TPD, TG and so on. The adsorption/catalysis performances of the samples in water-gas shift were studied by a fixed-bed reactor. The results show that Fe5/CaO-MAM exhibits the most alkaline sites and the highest CO2 adsorption capacity (0.105 g/g), and the CO2 adsorption capacity only decreases by 23% after ten cycles. Under the temperature of 600 ℃, atmospheric pressure, n(H2O)/n(CO) = 6 and the mixed gas (φ(CO) = 4%, φ(N2) = 46% and φ(Ar) = 50%) flow rate of 100 mL/min, Fe5/CaO-MAM shows the best adsorption/catalysis performance after reaction for 2 h, with CO average conversion rate and H2 average yield both reaching 84.24% and H2 average selectivity of 100%. The average proportion (volume fraction) of CO2 in the product gas is 18.05%, and the pre-penetration stage lasts up to 2 h.关键词：water-gas shift;iron-calcium-based dual-functional materials;n(Ca)/n(Fe);adsorption capacity;alkaline sites25|0|0更新时间：2025-05-29
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