ZnCaAl Composite Oxide Catalyzes Cycloaddition of CO2 with Propylene Oxide to Produce Propylene Carbonate

IF 2.5 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2026-06-26 DOI:10.1007/s10562-026-05459-5

Shuyi Li, Shuangming Li, Haiyang Yu, Yinong Li, Sansan Yu

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Abstract

A series of ZnCaAl composite oxide catalysts were synthesized via a rapid and straightforward spray-drying method. The crystalline structure, morphology, specific surface area, and surface basicity of the catalysts were systematically characterized by XRD, SEM, BET, and CO₂-TPD. Results demonstrate that spray-drying significantly enhanced both textural and catalytic properties. For the catalyst with a Zn/Ca molar ratio of 4.0, the specific surface area increased from 35 m²/g to 93 m²/g compared to its non-spray-dried counterpart, accompanied by a pronounced increase in propylene carbonate selectivity. The resulting spherical morphology and high surface area jointly promoted active-site exposure, facilitating propylene oxide ring-opening and CO₂ adsorption, thereby driving the cycloaddition reaction forward. Under the optimized conditions (150 °C, 2.5 MPa, 8 h, with 1.5 mL of triethylamine as co-catalyst), the sample with a Zn/Ca molar ratio of 4.0 exhibited the best catalytic performance among the tested catalysts with varying molar ratios, achieving 95.89% conversion of propylene oxide and 81.38% selectivity of propylene carbonate.

Graphical Abstract

Abstract Image

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氧化锌铝复合氧化物催化CO2与环氧丙烷环加成制碳酸丙烯酯

采用喷雾干燥法合成了一系列锌钙复合氧化物催化剂。采用XRD、SEM、BET和CO2-TPD对催化剂的晶体结构、形貌、比表面积和表面碱度进行了系统表征。结果表明，喷雾干燥显著提高了其织构和催化性能。对于Zn/Ca摩尔比为4.0的催化剂，与未喷雾干燥的催化剂相比，比表面积从35 m2/g增加到93 m2/g，同时碳酸丙烯酯的选择性显著提高。由此产生的球形形貌和高比表面积共同促进活性位点暴露，促进环氧丙烷开环和CO2吸附，从而推动环加成反应向前发展。在优化条件下（150°C, 2.5 MPa, 8 h， 1.5 mL三乙胺作为助催化剂），锌/钙摩尔比为4.0的样品在不同摩尔比的催化剂中表现出最好的催化性能，环氧丙烷的转化率为95.89%，碳酸丙烯酯的选择性为81.38%。图形抽象

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.