最新刊期
卷 51 ， 期 4 ， 2026
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摘要：The synthesis of high-value-added carbon compounds via CO2 hydrogenation is recognized as a critical pathway for achieving carbon resource recycling, in which the reverse water gas shift (RWGS) reaction serves as an essential intermediate step, playing a significant role in promoting the deep utilization of CO2 resources. Thermodynamic analysis indicates that high temperatures are favorable for the RWGS reaction, whereas high-temperature imposes stringent requirements on catalyst stability. In recent years, spinel catalysts have shown promising potential in the RWGS reaction due to their high thermal stability, tunable active sites and simple preparation processes. The research progress on spinel catalysts (Cu-based and other metal spinel catalysts) for RWGS reaction was summarized. The structure-activity relationships of spinel catalysts were analyzed, mainly including the influence mechanisms of metal cations, surface oxygen vacancies and basic sites on catalytic behaviors. The RWGS reaction mechanisms were proposed, and the key issues that urgently need to be addressed in this field were discussed. It is demonstrated that the activation of H2 and CO2 is mainly facilitated by active metals and oxygen vacancies. CO2 adsorption and activation are also promoted by basic sites. In addition, the spinel crystal structure exhibits preference and directional regulation for CO2 and CO adsorption. The RWGS reaction mechanisms catalyzed by spinel catalysts are redox mechanism and the associative mechanism. Cu-Al spinel catalysts mainly follow the associative mechanism, while other spinel catalysts such as AFe2O4 (A = Ni, Cu or Zn) and ZnCr2O4 spinel catalysts follow the redox mechanism.关键词：reverse water gas shift;spinel catalysts;structure-activity relationships;reaction mechanisms9|0|0更新时间：2026-04-23 -
摘要：The research on solar-driven photocatalytic CO2 reduction to fuels and high-value-added chemicals over graphitic carbon nitride (g-C3N4) has attracted significant attention, emerging as a feasible strategy to facilitate achievement of the “carbon neutrality”goals. However, this technology still faces technical challenges, such as rapid recombination of photogenerated charge carriers and difficulties in CO2 activation. Understanding the mechanistic fundamentals of photocatalytic CO2 over g-C3N4 reduction is essential, and exploring synthesis and modification strategies for g-C3N4 may hold the key to addressing these limitations. Currently, practical and promising modification strategies mainly include the following three categories: Elemental doping to tailor the electronic band structure of the catalyst and extend the light absorption range; Construction of heterojunctions to facilitate the separation and migration of photogenerated carriers and enhance the utilization efficiency of electrons; Micro/nano-structural morphology engineering to increase the specific surface area and expose more active sites, thereby improving CO2 adsorption/activation and reaction kinetics. Based on literature survey and comprehensive analysis, it is found that the synergistic multi-scale modification of catalysts, precise regulation of product distribution, and enhancement of material stability collectively contribute to a more significant improvement in the catalytic performance of g-C3N4-based photocatalysts.关键词：photocatalysis;carbon nitride;modification strategies;CO2 reduction7|0|0更新时间：2026-04-23 -
摘要：One of the effective ways to achieve CO2 conversion is to hydrogenate CO2 to produce low-carbon olefins through reverse water gas reaction. Iron based catalysts are considered as preferred catalyst candidates due to their suitable hydrogenation activity, carbon chain growth ability and lower cost. As iron-based catalysts, iron nitride catalysts are promising catalysts for the preparation of high-value products from CO2 hydrogenation. However, the distribution pattern of carbon containing products in CO2 hydrogenation catalyzed by iron nitride catalysts with different N contents is still unclear. By precisely adjusting the calcination conditions, three iron-based catalysts with different N contents (Na/Fe2O3, Na/Fe2N and Na/Fe4N) were successfully prepared, and their catalytic performances for CO2 hydrogenation to low-carbon olefins were studied. The results show that under the conditions of 320 ℃, 1.5 MPa, CO2/H2/Ar (volume ratio of 1:3:3) and space velocity of 10000 mL/(g·h), the low-carbon olefins selectivity of Na/Fe4N (49.4%) is higher than that of Na/Fe2N (32.6%) and Na/Fe2O3 (33.7%), and the CO selectivity, heavy hydrocarbons with five or more carbon atoms (C5+) selectivity and ratio of olefins with two to four carbon atoms to alkanes selectivity (O/P value) of Na/Fe4N are higher than those of Na/Fe2N, but the CO2 conversion rate is lower than that of Na/Fe2N after 14 h reaction. The XPS characterization results show that the electron cloud density of Fe species and Fe5C2 decreases in Na/Fe2N after reaction, which is not conducive to the generation of low-carbon olefins.关键词：CO2 hydrogenation;low-carbon olefins;iron nitride catalysts;CO2 conversion rate45|174|0更新时间：2026-04-23 -
摘要：CO is a widely distributed air pollutant that poses a significant threat to the environment and human health. At present, CO thermal catalytic oxidation is considered to be the most energy-efficient and efficient conversion method, but the Pt/CeO2 catalyst prepared by traditional impregnation method is close to the limit of its catalytic performance. For supported Pt/CeO2 single-atom catalyst, the surface properties of the support and the local coordination environments of the metal single-atom play an important role in its catalytic performance. The P-modified single-atom catalyst Pt/CeO2-yPOx was prepared by the introduction of phosphoric acid by impregnation, and the structure of the Pt/CeO2-yPOx was characterized by XRD, CO-DRIFTS, FT-IR and so on, and the catalytic performance was studied. The results show that when m(phosphoric acid)/m(CeO2) ≤ 0.0850, Pt exists in the catalyst as a single atom. For Pt/CeO2-yPOx, P—O—Pt coordination is formed, and its total amount of Lewis acid sites increases, and a trace amount of Brønsted acid is also generated, which is beneficial for the CO adsorption. At the same time, the reduction performance of the catalyst is improved, so the catalytic performance for low-temperature CO oxidation is significantly improved. Pt/CeO2-0.085POx shows the best catalytic performance, reducing the CO conversion temperature to 40 ℃ and reducing the temperature at which the CO conversion rate reaches 100% to 110 ℃.关键词：Pt/CeO2;low-temperature CO oxidation;P-modification;single-atom catalyst98|362|0更新时间：2026-04-23 -
摘要：Precise construction of Lewis acid sites (LAS) in zeolite molecular sieves is one of the important strategies to improve their catalytic activity. However, problems such as water induction, poisoning, carbon deposition and skeleton collapse in actual reactions can lead to the destruction and deactivation of LAS. The construction methods, deactivation mechanisms and stabilization strategies of LAS were systematically reviewed. LAS can be efficiently constructed by framework de-alumination (hydrothermal and acid treatment), metal ion doping and defect engineering, and their catalytic activity originates from the electron-deficient property of the coordinating unsaturated metal center. However, LAS are prone to coordination saturation with water molecules, high-temperature hydroxyl condensation, carbon deposition, and cation dissolution during the reaction process, leading to acid strength decay and structural collapse, resulting in deactivation. Current LAS stabilization strategies focus on: (1) Hydrophobic modification (increasing silica-aluminium ratio (molar ratio), surface functionalization) to inhibit hydrolysis; (2) Structural reinforcement (metal ion doping, preparation of physical protective layer and construction of high-entropy alloys) to delay the migration of aluminium species; (3) Hierarchical pore construction to enhance the anti carbon deposition performance; (4) LAS regeneration. Above strategies play an important role in stabilizing LAS. In the future, with the continuous development of characterization technologies and catalyst preparation technologies, researchers can accurately analyze the mechanisms of LAS deactivation and construct atomic level anti-deactivation sites.关键词：zeolite molecular sieves;Lewis acid sites;hydrophobic modification;structural reinforcement;hierarchical pore construction218|228|0更新时间：2026-04-23 -
摘要：Allyl acetate (AAc) is an important organic chemical feedstock, and its downstream derivatives find extensive application in multiple fields. Allyl oxylation is an important approach for the synthesis of allyl acetate, and the catalyst is the core factor influencing this process. The research progress on allyl acetate catalysts (mainly Pd-Cu catalysts) was reviewed. Firstly, two main reaction mechanisms for the catalytic synthesis of AAc were introduced. Then, the effects of support modification, optimization of active components, screening of co-catalysts and improvement of preparation processes on the catalytic performances of the catalysts were summarized. Finally, the future research directions of allyl acetate catalysts were prospected.关键词：allyll acetate;propylene;oxyacetylation;Pd-Cu catalysts88|80|0更新时间：2026-04-23 -
摘要：As a crucial chemical intermediate, methyl glycolate (MG) has extensive applications in fields such as pharmaceuticals and fine chemicals. The route for preparing MG through the hydrogenation of dimethyl oxalate (DMO) using syngas as the raw material has green development concept and boasts high growth potential. Cu-based catalysts exhibit good catalytic performance in DMO hydrogenation reaction but tend to induce deep hydrogenation. To achieve the synergistic optimization of efficient DMO conversion and selective MG synthesis, TiO2 with different morphologies were prepared as the supports firstly, and then a series of Cu-based catalysts (Cu/TO-Nx) were fabricated via the ultrasonic impregnation method. The obtained supports and catalysts were characterized by SEM, N2 physical adsorption/desorption, XRD and so on, and the catalytic performances of Cu/TO-Nx in DMO hydrogenation to MG were investigated. The results demonstrate that support with nanosheet structure (TO-NF) possesses the highest defect degree and the fewest acidic sites, which are conducive to the uniform dispersion of Cu species and the inhibition of side reactions. The Cu/TO-NF catalyst has the highest proportion (n(Cu0)/n(Cu0 + Cu+)) of Cu⁰ species at 74.80%, with Cu0 particle size of 5.45 nm, and there exists an electronic interaction between the Cu species and TO-NF. Under the reaction conditions of temperature of 230 ℃, pressure of 2.5 MPa, weight hourly space velocity of 0.7 h-1 and n(H2)/n(DMO) of 30, the DMO conversion rate, MG selectivity and MG yield of Cu/TO-NF can reach 87.73%, 82.38% and 72.27%, respectively. Moreover, the catalytic performance of Cu/TO-NF can remain basically stable after 550 h continuous reaction under the aforementioned conditions.关键词：Cu-based catalyst;titanium dioxide;dimethyl oxalate hydrogenation;methyl glycolate;electronic interaction68|154|0更新时间：2026-04-23 -
摘要：The design and development of slurry phase hydrocracking catalysts are key to the efficient conversion of heavy oil. Traditional transition metal sulfide catalysts are prone to agglomerate during hydrogenation reactions, resulting in low metal atom utilization rate and decreased hydrogenation performance. Single-atom catalysts have the highest metal atom utilization rate and adjustable active center structure, which show excellent hydrogenation performance, providing new ideas for the design of heavy oil slurry phase hydrocracking catalysts. Research progress on heavy oil slurry phase hydrocracking catalysts in recent years was reviewed, with particular emphasis on the structural characteristics and catalytic performance differences between nano-scale catalysts and single-atom catalysts. At the atomic scale, design strategies for heavy oil hydrocracking catalysts were then proposed, including coordination structure regulation, dual-atom site cooperative regulation, and single-atom-sulfide coupling regulation. In addition, the issues and challenges of single-atom catalysts in heavy oil slurry phase hydrocracking were prospected.关键词：heavy oil;slurry phase hydrocracking;single-atom catalysts;atomic-scale regulation;active sites86|0|0更新时间：2026-04-23 -
摘要：Porous carbon materials produced by biomass pyrolysis have shown broad application prospects in energy, environment and other fields due to their sustainability, large specific surface area, good chemical stability and adjustable pore structure, and have become a research hotspot. The latest research progress on porous carbon materials produced by biomass pyrolysis was reviewed. The structures, performances and main application fields of the porous carbon materials synthesized from four types of precursors: Plants, animals, microorganisms, and industrial by-products and wastes were summarized. The influence on pyrolysis temperatures, pyrolysis residence time, and heating rates on the pore structures and surface chemical properties of the porous carbon materials were systematically analyzed. The strategies and principles of activation treatment and doping modification in increasing specific surface areas, regulating pore size distributions and introducing active sites were summarized. The industrialization status and existing problems of porous carbon materials produced by biomass pyrolysis were expounded. Among them, the integrated design of “raw material selection-process optimization-performance directional regulation” is one of the research directions for preparing functionalized porous carbon materials with specific pore structures and excellent properties.关键词：biomass pyrolysis;porous carbon materials;pyrolysis conditions;activation;doping155|0|0更新时间：2026-04-23 -
摘要：The problem of environmental pollution and resource waste caused by large-scale waste of polyethylene terephthalate (PET) plastics needs to be solved urgently. PET methanolysis technology has emerged as a crucial breakthrough due to its low cost and efficient closed-loop recovery characteristics. In view of the current problems such as difficult separation, insufficient stability and high cost of PET methanolysis catalysts, focusing on transition metal oxide (such as ZnO, MnO) materials with simple and stable structure, low cost and easy recovery, studies such as catalyst screening, reaction condition optimization, cycle stability testing, structure-activity relationship and catalytic reaction mechanism analysis were carried out. The results show that under the optimal conditions of temperature of 180 ℃, ZnO dosage (relative to PET mass fraction) of 10.0%, methanol feed ratio of 40 mL/g and reaction time of 2 h, for commercial PET particles and post-consumer PET bottle flakes, the PET depolymerization rates both are 100% and the dimethyl terephthalate yields are 89.1% and 91.0%, respectively. ZnO can maintain stable structure and catalytic performance throughout 10 cycles of reaction. The catalytic process involves a synergistic mechanism utilizing dual active sites (Zn2+ sites + oxygen vacancy sites) on ZnO. The good catalytic performance and stability of ZnO are attributed to its abundance of dual active sites and intrinsic stability.关键词：polyethylene terephthalate;methanolysis;dimethyl terephthalate;transition metal oxides;zinc oxide205|240|0更新时间：2026-04-23 -
摘要：The co-pyrolysis technology that uses organic solid waste to replace fossil fuels has dual value in reducing coal consumption and promoting efficient utilization of resource. To extend traditional biomass/plastic-coal binary mixed system to biomass-plastic-coal ternary mixed system, the co-pyrolysis characteristics and kinetics of torrefied biomass (rice husks, corn stalks) and polyethylene plastic (PE) with bituminous coal (BC) were studied by TG-MS coupling instrument. The results show that torrefaction can significantly increase the carbon content of biomass and improve the pyrolysis characteristics. In co-pyrolysis of binary mixtures composed of BC and solid wastes, the addition of torrefied corn stalks (HC) or PE can not only promote the pyrolysis of BC but also can increase the release amounts of combustible gases (H2, CH4 and CO), while the addition of torrefied rice husks (HR) can inhibit the generation of combustible gases. For the ternary mixtures, the synergistic effect produced by co-pyrolysis of BC-HC-P (P represents torrefied PE) is much stronger than that of BC-HR-P, with the maximum synergistic index of 4.73%, and the co-pyrolysis of BC-HC-P can release more H2. It is found through the Coats-Redfern method that the activation energy and average activation energy of BC-HC and BC-HC-P in stage two of co-pyrolysis are 91.07 kJ/mol and 111.23 kJ/mol, respectively.关键词：bituminous coal;pyrolysis;torrefied biomass;waste plastics;synergistic effect;kinetic analysis172|296|0更新时间：2026-04-23 -
摘要：The porous slurry integrates the excellent fluidity and mass/heat transfer properties of liquid absorbents, and has the high specific surface area and well-developed pore structure of porous solid adsorbents, which is expected to become a new generation medium for CO2 capture. To explore the indicators and energy consumption of CO2 removal process using ZIF-8/DMAC porous slurry, a full-process model of slurry treating 300000 m3/h shift gas (H2/CO2) was established by Aspen Plus, based on the gas-slurry phase equilibrium experiments. The operating conditions and energy consumption per unit feed gas were analyzed and compared with the traditional propylene carbonate (PC) CO2 capture process. The mean relative error between the simulation and the experiment solubility is less than 5.00%, indicating that the model results show good agreement with experimental data. For shift gas with 40% (mole fraction) CO2, under the conditions of absorption pressure of 1.8 MPa, absorption temperature of 30 ℃, gas-liquid volume ratio of 80, and desorption pressure of 0.01 MPa, the H2 recovery ratio of the ZIF-8/DMAC porous slurry process is 98.73% and the CO2 capture ratio is 99.11%, and the CO2 concentration in the purified gas is as low as 0.60%, and the energy consumption is 0.026 (kW·h)/m3. Compared with the PC process under the same CO2 capture task, the ZIF-8/DMAC slurry process reduces solvent circulation by 50.10% and energy consumption by 38.10%, showing a clear energy-saving advantage.关键词：porous slurry;CO2 capture;phase equilibrium;process simulation;process comparison1|0|0更新时间：2026-04-23 -
摘要：The removal of COS from blast furnace gas is essential for the steel industry to meet ultra-low emission requirements. At present, COS hydrolysis catalysts that have been developed are prone to oxygen poisoning and deactivation, have a short service life, and thus cannot meet the requirements of industrial applications. Ti-Al-based (TiO2-Al2O3) COS hydrolysis catalysts were prepared by a dry mixing method and extruded at forming pressures of 10 MPa, 19 MPa and 43 MPa, respectively. Under the conditions of 60 ℃, COS mass concentration of 300 mg/m3, O2 volume fraction of 12% and space velocity of 1000 h-1, the catalytic performances of the catalysts were tested. In addition, N2 adsorption/desorption, MIP, SEM and XPS were employed to investigate the mechanism by which forming pressure affects catalytic performance. The results show that during catalytic hydrolysis, COS diffuses from the external surface of the catalyst through pores to the internal surface, where it is adsorbed and undergoes a hydrolysis reaction with —OH or H2O to produce H2S and CO2. These products then diffuse outward through the pores to the external surface of the catalyst. As the forming pressure increases, the catalyst particles become gradually densified. Microscopically, part of the 100 nm to 1000 nm macropores are compressed and collapsed, forming ultramacropores of 10 μm to 360 μm at the macroscopic scale, which significantly hinders COS adsorption and H2S diffusion. Increased H2S adsorption further leads to oxidation and sulfur deposition on the catalyst surface. The presence of oxygen vacancies can promote oxygen migration, which to some extent enhances COS adsorption and facilitates the diffusion of H2S, thereby partially suppressing sulfur deposition. This study provides a reference for the industrial application of related laboratory research results.关键词：forming pressure;blast furnace gas;Ti-Al-based catalysts;COS;catalytic hydrolysis33|66|0更新时间：2026-04-23 -
摘要：With the large-scale emission of acidic gases such as CO2, SO2 and H2S, significant negative impacts on the environment have been caused, thereby making the development of efficient and environmentally friendly gas absorbents a research hotspot. Lactic acid (LAC) was used as a hydrogen-bond donor and 2-ethylhexylethylenediamine (EtHexen) as a hydrogen-bond acceptor to prepare a deep eutectic solvent (DES) via a mixed-heating method, and the absorption performance of the LAC-EtHexen DES for SO2/CO2/H2S mixed-gas was investigated. First, FT-IR and 1H NMR analyses were employed to verify whether the DES was successfully prepared. Then, molecular dynamics (MD) simulations using GROMACS were performed to study the absorption of SO2/CO2/H2S mixed-gas by the DES, followed by analyses of gas absorption rates, interaction energies and number-density distributions. The results show that the absorption rates of the DES for the gases are 95% (SO2), 63% (CO2) and 50% (H2S). MD simulations further reveal that there exists a strong interaction energy between the DES and SO2 (-2700.60 kJ/mol), which is significantly stronger than that with CO2 (-1051.53 kJ/mol) and H2S (-618.53 kJ/mol). This strong interaction causes absorbed SO2 molecules to mainly aggregate within the liquid phase of the DES, whereas CO2 and H2S are mainly distributed at the gas-liquid interface. This work provides a reference for studying the gas absorption and separation behavior of this type of DES.关键词：deep eutectic solvent;gas absorption;molecular dynamics50|0|0更新时间：2026-04-23 -
摘要：To improve the ethane recovery rate, cold energy utilization rate and exergy efficiency in light hydrocarbon recovery processes, and to enhance the comprehensive utilization efficiency of LNG cold energy, an integrated process of light hydrocarbon recovery and air separation driven by LNG cold energy was proposed. Using ethane recovery rate, system power consumption, cold energy utilization rate, exergy efficiency and net present value as evaluation indicators, the effects of key parameters on system performance were investigated, along with multi-objective optimization, exergy analysis, and comprehensive economic (net present value) evaluation. The results show that the demethanizer inlet pressure and temperature, the inlet temperature of distillation column 1 and the air mass flow rate have significant impacts on system performance. After multi-objective optimization, the process achieves an ethane recovery rate of 94.79%, a system power consumption of 4.27 × 104 kW, a cold energy utilization rate of 88.20%, an exergy efficiency of 84.66% and a net present value of 294.8 × 108 CNY. Exergy analysis of equipment indicates that the combined exergy losses of compressors, distillation columns and heat exchangers account for more than 85% of the total losses, representing key links for improving system energy efficiency. The proposed process demonstrates significant advantages in cold energy cascade utilization, ethane recovery and exergy efficiency, while exhibiting both technical feasibility and economic competitiveness, thus can provide a new approach for coupling LNG cold energy with chemical separation processes.关键词：LNG cold energy-driven;light hydrocarbon recovery;cold energy utilization rate;multi-objective optimization;exergy analysis;net present value85|246|0更新时间：2026-04-23
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