文献类型：期刊文献

英文题名：Cs-Promoted Co Particles on Yttria-Stabilized Zirconia as Coke-Tolerance Methane Dry Reforming Catalyst under Elevated Pressure

作者：Zhang, Penghao[1];Yao, Juntao[1];Zhu, Yi-an[1];Liu, Zhicheng[2];Zhu, Kake[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai 200237, Peoples R China;[2]Shanghai Res Inst Petrochem Technol, Shanghai 201208, Peoples R China

年份：2025

卷号：11

期号：1

外文期刊名：CHEMNANOMAT

收录：;EI(收录号：20244517321570);WOS:【SCI-EXPANDED(收录号:WOS:001357332200001)】；

基金：Authors are grateful for financial support from the National Natural Science Foundation of China (No. 22178111) and the SINOPEC joint research project with Shanghai Research Institute of Petrochemical Technology (Grant No. 222215).

语种：英文

外文关键词：Methane dry reforming; Co catalyst; Coke resistance; Cesium; Kinetics

摘要：Methane reforming with CO2 (dry reforming) co-converts the two green-house gases into synthesis gas and offers a promising way to integrate CO2 utilization into the current chemical infrastructure. One major obstacle for its industrial deployment is coke deposition on catalyst surface, in particular, under industrially relevant, pressurized operation conditions. Most catalytic investigations are conducted at atmospheric pressure, but the elevation in pressure poses a grand challenge for catalyst design. In this study, we demonstrate that Cs can promote carbon-tolerance of Co catalyst supported on Yttria-stabilized Zirconia under 20 bar, 850 degrees C with stochiometric feed flow for up to 100 h, which is often regarded as accelerated deactivation testing condition. Lowered amount and mostly CO2 gasifiable residue carbons are determined in Cs-promoted spent Co-catalyst, with respect to pristine Co catalyst. Kinetic studies reveal that Cs slows down coke deposition, while the essential reaction mechanism on pristine Co catalyst remains unaltered. Cs+ moieties absorb CO2 to afford Cs2CO3 that can release O* on adjacent Co surface to facilitate surface C* oxidation and simultaneously suppress carbon nucleation. The disclosure of the promoting effect of Cs on Co catalyst may have implications to other reforming catalyst and process design.