Sulfate-Promoted Higher Alcohol Synthesis from CO 2 Hydrogenation

作者：Yanqiu Wang, Xinxin Zhang, Xinlin Hong, Guoliang Liu · 发表于：ACS Sustainable Chemistry & Engineering · 年份：2022 · DOI：10.1021/acssuschemeng.2c02743 · 被引用次数：38 · 研究领域：Carbon dioxide utilization in catalysis、Asymmetric Hydrogenation and Catalysis、Catalysis for Biomass Conversion

Sulfur is usually regarded as a catalyst poison for many industrial reactions. Since an increasing number of studies have also reported that sulfate can serve as a promoter for certain reactions, the effects of sulfate on catalysts should be critically treated. Herein, we report a promotion effect of sulfate species on higher alcohol synthesis (HAS) from CO 2 hydrogenation over a typical KCuFe-based catalyst. It is found that sulfate modification can regulate the hydrogenation capacity and balance of CO dissociated and nondissociated activation, thus optimizing the reaction network of CO 2 hydrogenation to higher alcohols. After optimization, the 0.6S-KCFZ catalyst with a moderate S doping (0.6 wt %) displays the HA selectivity of 22.9% and HA STY of 50.7 mg g cat –1 h –1 under the reaction conditions of 320 °C, 5 MPa, and 3 L g cat –1 h –1 . Furthermore, based on the reaction coupling strategy, we combined 0.6S-KCFZ with CuZnAlZr (CO 2 reduction to C1 species) to construct a multifunctional catalyst, which showed a superior HAS catalytic performance (173.9 mg g cat –1 h –1 at GHSV of 12 L g cat –1 h –1 ). This work provides a distinctive example for the insight of sulfate modification on HAS from CO 2 hydrogenation.