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- Publication Frequency: Monthly
- Started: 1976
- ISSN 2097-2547
- CN 51-1807/TQ
- Superintended by: China Haohua Chemical Group Co., Ltd.
- Sponsored by: Southwest Institute of Chemical Co., Ltd.
- Editor-in-Chief : SUN Bing
- Vice Editor-in-Chief：ZHANG Junjie
- Editor & Publisher: Editorial Office of Low-Carbon Chemistry and Chemical Engineering
- Tel: +86-28-85964717/85963476
- E-mail: dthxyhg@sinochem.com
- Address: No.393, Jindu Section, Airport Road, Shuangliu, Chengdu, China
- Domestic Distribution Code: 62-269
- Abroad Distribution Code: BM2893
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2026年第51卷第5期
- 摘要：In order to address the global climate change challenge and achieve the “carbon neutrality” goal, carbon capture, utilization and storage (CCUS) technology has become a key approach to mitigate greenhouse gas emissions. Among them, capturing and converting CO2 into cyclic carbonates has significant economic and environmental advantages and is considered one of the most promising carbon capture and utilization technologies for industrial application. The mechanism of CO2 cycloaddition reaction with epoxides was reviewed, and the limitations of traditional catalytic systems, such as poor recyclability and lack of nucleophilic groups were pointed out. The synthesis methods of ionic liquid/metal-organic framework (IL/MOF) composite materials were emphasized, including in-situ encapsulation, pre-modification, and post-modification. The catalytic performances of IL/MOF composite materials were analyzed and the current challenges of poor stability, easy loss of active components and so on were pointed out. Future research should focus on constructing micro-mesoporous MOF carriers to fully utilize the structural advantages of multi-level pores for the purpose of further improving the catalytic performances of IL/MOF composite materials, and developing green, low-energy and efficient IL/MOF composite materials suitable for the chemical conversion of low-concentration CO2 mixed gases to meet the needs of practical industrial applications.关键词：CO2 capture;metal-organic framework;ionic liquid;composite materials;cycloaddition reaction;cyclic carbonates178|367|0更新时间：2026-05-22
- 摘要：With the continuous reduction of fossil fuel reserves, continuous rise of oil prices and increasingly serious environmental problems, people have conducted in-depth research on alternative energy sources. Cu-based catalysts are one of the most important catalysts for the direct conversion of syngas to higher alcohols (C2~C6 alcohols, abbreviated as “C2+ alcohols”). However, there is a problem of high proportion of methanol and low proportions of ethanol and C2+ alcohols. A series of CuZn catalysts with varying n(Al):n(Ga) (CuZnAlGa) were synthesized by complete liquid-phase method. Properties such as phase compositions, textural properties and reducibilities were characterized by XRD, N2 adsorption/desorption, H2-TPR, etc. The syngas hydrogenation to C2+ alcohols was carried out in a slurry bed reactor, and catalytic performances of CuZnAlGa were analyzed. The results show that the catalyst with n(Al):n(Ga) = 1:2 has the highest oxygen vacancy content and shows the best catalytic performance. After reacting for 168 h under the reaction conditions of 553 K, 4.0 MPa and n(H2):n(CO) = 2:1, the CO conversion rate reaches 11.54%, and the proportions (mole fractions) of ethanol and C2+ alcohols in the total alcohol are 71.25% and 86.88%, respectively.关键词：Al3+ and Ga3+ co-doping;CuZn catalysts;complete liquid-phase method;ethanol;higher alcohols125|90|0更新时间：2026-05-22
- 摘要：Chemical looping-steam methane reforming (CL-SMR) enables efficient methane conversion to clean energy, with LaNiO3 emerging as a promising oxygen carrier due to its exceptional oxygen storage capacity and catalytic activity. However, the micro mechanism of CH4 conversion on LaNiO3 surface remains unclear, which limits the directional optimization design of LaNiO3 oxygen carrier. To clarify the reaction mechanism of CL-SMR on LaNiO3(110) surface, based on density functional theory (DFT), adsorption models of various intermediates (CHx, x = 0~4) on LaNiO3(110) surface during CH4 decomposition were first constructed to clarify the stable adsorption configuration. Then the micro reaction path network was analyzed from four core processes: CH4 sequential dehydrogenation, CO/CO2 formation, H2/H2O generation and oxygen diffusion. The results show that during the CH4 sequential dehydrogenation process on LaNiO3(110) surface, there are strong interactions between the intermediates and the oxygen carrier surface, and the adsorption configurations are stable. The process is thermodynamically favorable and the reaction paths are stable and feasible. Among them, the energy barrier required for the CH dehydrogenation is significantly higher than other steps, identified as the rate-determining step. Generated CO readily oxidizes further to CO2, while H prefer forming H2O. What’s more, the oxygen vacancies formed after the consumption of surface oxygen by the reaction can be supplemented by the bulk lattice oxygen diffusion. LaNiO3 oxygen carrier can efficiently catalyze CH4 conversion to CO2 and H2O, but its catalytic performance needs to be further improved by lowering the energy barrier of rate-determining step. This relevant research results clarify the reaction mechanism of CH4 on LaNiO3(110) surface, in order to provide a theoretical reference for designing high-performance LaNiO3 oxygen carriers for CL-SMR.关键词：chemical looping reforming;density functional theory;LaNiO3 oxygen carrier;CH4105|0|0更新时间：2026-05-22
- 摘要：Methanol is an important basic chemical feedstock and energy carrier. Utilizing CO2 catalytic hydrogenation to methanol can alleviate energy shortages to a certain extent while also aligning with the demands of green economic development. CuZnGa catalysts were synthesized using three different methods (co-precipitation, hydrothermal and sol-gel methods). Their catalytic performances were systematically compared in CO2 hydrogenation to methanol reaction. Characterization techniques including XRD, TEM, N2 adsorption/desorption, XPS, CO2-TPD, and H2-TPR were used to analyze their physicochemical properties. The results show that among three catalysts, the catalyst prepared by co-precipitation exhibits largest specific surface area (49.0 m2/g) and highest relative oxygen vacancy (19.8%), providing abundant active sites for CO2 activation and conversion. Under reaction conditions of 260 ℃, 4 MPa and 7500 mL/(g·h) for 10 h, it achieves CO2 conversion rate of 15.8% and methanol selectivity of 56.4%, outperforming other catalysts.关键词：CuZnGa catalysts;CO2 hydrogenation;methanol;co-precipitation method;oxygen vacancy;specific surface area35|0|0更新时间：2026-05-22
- 摘要：The selective hydrogenation of biomass-derived furfural to furfuryl alcohol is one of the important approaches for the conversion and utilization of biomass resources. Although Cu/SiO2 catalysts are widely employed in industry for hydrogenation, their catalytic activity in furfural hydrogenation remains insufficient. A series of Cu/SiO2 catalysts were prepared by co-precipitation method and then subjected to aging treatment at room temperature, 60 ℃, 80 ℃, 100 ℃ and 120 ℃, respectively. The effects of aging temperatures on catalytic performances of Cu/SiO2 catalysts for furfural hydrogenation to furfuryl alcohol were investigated, and the variations of catalyst structures before and after reaction were analyzed. The results show that under the optimal reaction conditions of 20 mL furfural, 0.2 g catalyst, reaction temperature of 180 ℃, reaction pressure of 3.5 MPa and reaction time of 2 h, the catalyst aged at 60 ℃ (Cu/SiO2(60)) exhibits excellent catalytic performance, achieving furfural conversion rate of 99.0% and furfuryl alcohol selectivity of 96.2%. The appropriate aging temperature (60 ℃) can promote the in-situ reduction of Cu2+ species to active Cu0 and Cu+ species during reaction process effectively, which can enhance the dispersion of Cu species and reduce their particle sizes, thereby significantly improving the catalytic performance of catalyst.关键词：Cu/SiO2 catalysts;aging temperatures;furfural hydrogenation;in-situ reduction141|203|0更新时间：2026-05-22
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Catalytic performances of MTiO3-type composite catalysts for urea alcoholysis to propylene carbonate
摘要：Propylene carbonate (PC) is widely used in battery and chemical industry. Urea alcoholysis to PC has a broad industrial application prospect with the features of cheap and easy-to-obtain raw materials, mild reaction conditions, etc. However, the commonly used metal oxide catalysts suffer from serious loss of active components and poor reproducibility, which severely limit the industrial development of urea alcoholysis method, so it is urgent to develop catalysts with both high activity and stability. MTiO3-type composite catalysts were prepared, and the effects of preparation conditions on the structures and catalytic performances for urea alcoholysis to PC of catalysts were studied by various characterization methods, such as TGA-DSC, XRD, SEM, etc., and the reaction conditions were optimized. The results show that MgTiO3-750 calcined at 750 ℃ shows the best catalytic activity. Under the conditions of reaction temperature of 170 ℃, reaction time of 3 h, n(1,2-propanediol):n(urea) = 1.5:1.0 and catalyst’s mass fraction of 1%, the PC yield reaches 91.2%. The PC yield maintains from 80.0% to 90.0% catalyzed by MgTiO3-750 reused five times under the same conditions. The composite catalyst MgTiO3 + ZnO was further constructed. It is found that through the synergistic effect of medium-strong base sites in MgTiO3 + ZnO, the PC yield increases to 95.7% under the same reaction conditions. What’s more, the PC yield still exceeds 91.0% catalyzed by MgTiO3 + ZnO reused multiple times. The catalytic activity can be restored by supplementing ZnO for regeneration treatment.关键词：sol-gel method;MTiO3-type composite catalysts;urea alcoholysis;propylene carbonate79|50|0更新时间：2026-05-22 - 摘要：Hydrogenation of dimethyl oxalate to ethylene glycol is a representative technological pathway for the efficient and clean utilization of coal, which has garnered widespread attention under the background of “carbon neutrality”. Although the route has been industrialized, current industrial setups still face the issue of catalyst deactivation. To investigate the mechanism of catalyst deactivation, Cu/SiO2 catalyst was selected as the model catalyst. Through stability evaluation tests, combined with characterization methods such as XRD, TEM, N2 adsorption/desorption, TGA and XPS, changes in the catalytic performances and structures of calcined, reduced and deactivated Cu/SiO2 catalysts were analyzed. The results indicate that the main causes of Cu/SiO2 catalyst deactivation are the agglomeration of Cu particles, carbon deposition, and changes of valence state of active component Cu. Among them, the agglomeration of Cu particles can reduce the numbers of active sites exposed on the catalyst surface, leading to a decline in catalytic activity. Carbon deposition, generated through a series of side reactions of intermediate products, can cover partial active sites on the catalyst, also resulting in decreasing of catalytic activity. Changes of valence state of Cu during the reaction can disrupt the synergistic effect between Cu+ and Cu0 in the catalytic hydrogenation process, leading to catalyst deactivation.关键词：dimethyl oxalate;hydrogenation;ethylene glycol;Cu/SiO2 catalyst;deactivation188|0|0更新时间：2026-05-22
- 摘要：Developing novel ethanol-to-butadiene catalysts is essential for enabling alternatives to the traditional butadiene production route. A series of Ag-ZrO2-SiO2 catalysts were prepared using co-precipitation method, in which the Zr precursor concentration was controlled. The catalysts were characterized by XRD, SEM, N2 adsorption/desorption, ICP-OES and Py-IR. Their catalytic performances in ethanol-to-butadiene were evaluated in a fixed-bed reactor to investigate the influence of acidity regulation on catalytic performance. The results show that controlling the Zr precursor concentration optimizes both the amount and strength distribution of Lewis acid sites, which promotes the main C—C coupling reaction of acetaldehyde while suppressing the side reaction of ethanol dehydration to ethylene. Under reaction conditions of 420 ℃ and weight hourly space velocity of 0.3 h-1, the AZS-2 catalyst (prepared by ZrO(NO3)2 solution with mass fraction of 10%) exhibits the best catalytic performance, achieving an ethanol conversion rate of 80.0% and a butadiene selectivity of 47.3%. Its ethylene selectivity is notably lower than that of other catalysts.关键词：Ag-ZrO2-SiO2 catalysts;co-precipitation method;ethanol-to-butadiene;Lewis acid regulation79|116|0更新时间：2026-05-22
- 摘要：The existing slow-release urea commonly faces issues such as high production costs and environmental pollution caused by degradation products, which limit their application in agricultural production. Consequently, developing efficient and cost-effective slow-release urea with environmentally friendly characteristics is the direction for the development of slow-release fertilizers. Biomass-based slow-release urea (B-SRU) was prepared by physical mixing, using four biomasses with different growth forms as raw materials. The differences in slow-release performance of different B-SRU were systematically compared and analyzed. The results show that the slow-release performance of different B-SRU exhibits significant variations in response to preparation temperatures due to the differences in structures and compositions of biomass raw materials. With the increase of preparation temperatures, the slow-release performance of herbaceous B-SRU gradually improves and the urea release rate can be reduced by 33.01%. The slow-release performance of woody B-SRU shows a gradually decreasing trend, and the slow-release performances of vine and hemp B-SRU show “V” and inverted “V” patterns in change, respectively. SEM and FTIR characterization results confirm that the binding mechanism between biomass and urea is mainly a dual action of physical dense wrapping and hydrogen bonding network. The release kinetics analysis shows that the release of urea from B-SRU is mainly dominated by classical Fick diffusion, and the urea molecules mainly migrate by diffusion through the physical pores of the biomass matrix.关键词：biomass;slow-release urea;slow-release performance;release kinetics164|130|0更新时间：2026-05-22
- 摘要：In the process of municipal wastewater treatment, a large amount of residual sludge is generated, characterized by high moisture content, high ash content, and low calorific value, which severely restricts the efficiency of sludge incineration for volume reduction and energy recovery. Deep dewatering commonly requires the addition of chemical conditioners and biomass skeletal agents. However, their effects on the subsequent combustion behavior of dewatered sludge remain insufficiently understood. Taking FeCl3 and CaO as typical chemical conditioning agents and rice straw, corn stalk and bamboo as biomass skeleton builders, the dewatered sludge was obtained after conditioning. The combustion characteristics of the dewatered sludge were investigated using thermogravimetric analysis. The results show that after conditioning with FeCl3, the ignition temperature and apparent activation energy of the sludge decreases, while the combustion characteristic parameters increase, significantly enhancing the combustion reactivity of dewatered sludge. In contrast, after conditioning with CaO, the ignition temperature and apparent activation energy of the sludge increase, while the combustion weight loss rate and combustion characteristic parameters decreases, which is unfavorable for combustion. When conditioned with biomas, the total mass loss and maximum mass loss rate increase markedly. However, ignition temperature increases with increasing biomass addition amount, and apparent activation energy rises from 26.60 kJ/mol for raw sludge to 29.87~41.16 kJ/mol, indicating an overall shift of combustion behavior toward biomass-dominated characteristics. Compared to adding biomass alone, FeCl3-biomass synergistic conditioning maintains a high total mass loss while exhibiting a lower apparent activation energy, whereas CaO-biomass synergistic conditioning increases apparent activation energy. These results demonstrate that FeCl3-biomass coupling exhibits a more pronounced synergistic promotion effect on combustion reactivity.关键词：dewatered sludge;synergistic conditioning;combustion characteristics;combustion kinetics;biomass skeleton22|0|0更新时间：2026-05-22
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