Zhu Qiangqiang, Yin Lilin, Han Xianyao, Wang Bin
National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
Department of Hydrogenation Catalyst, Sinopec Research Institute of Petroleum Processing, Beijing 100083, PR China.
ACS Omega. 2025 Feb 17;10(7):7069-7076. doi: 10.1021/acsomega.4c10129. eCollection 2025 Feb 25.
A novel ScO-SiO catalyst was explored and evaluated for the upgrade of ethanol and acetaldehyde to butadiene. Notably, the ScO-SiO catalyst with a Sc/Si molar ratio of 0.06 demonstrated exceptional performance, exhibiting the highest selectivity of 81.7% for butadiene alongside a selectivity of 10.2% for butanol. When the Sc/Si ratio was increased to 0.3, the butanol selectivity increased to 30.0%. To elucidate the underlying factors governing these results, detailed characterizations of the catalysts structure and acidic-basic properties were conducted for the ScO-SiO materials. The analyses revealed that the higher percentage of strong acidic sites in total acidic sites was conducive to higher butadiene yield, while the increased density of strong basic sites correlated with higher butanol selectivity.
研究并评估了一种新型的ScO-SiO催化剂用于将乙醇和乙醛升级转化为丁二烯。值得注意的是，Sc/Si摩尔比为0.06的ScO-SiO催化剂表现出卓越的性能，对丁二烯的选择性最高可达81.7%，同时对丁醇的选择性为10.2%。当Sc/Si比增加到0.3时，丁醇选择性提高到30.0%。为了阐明影响这些结果的潜在因素，对ScO-SiO材料进行了催化剂结构和酸碱性质的详细表征。分析表明，总酸位点中强酸性位点的比例较高有利于提高丁二烯产率，而强碱性位点密度的增加与丁醇选择性的提高相关。
