Insights into Ni and (Ce)SBA-15-CTA interaction and syngas formation rate

Insights into Ni and (Ce)SBA-15-CTA interaction and syngas formation rate

Molecular Catalysis

10.1016/j.mcat.2021.111850

http://dx.doi.org/10.1016/j.mcat.2021.111850

Luming Li, Dapeng Liu, Zhanglong Guo, Shibo Xi, Wei Chu, Yan Liu

03 September 2021

Li, L., Liu, D., Guo, Z., Xi, S., Chu, W., & Liu, Y. (2021). Insights into Ni and (Ce)SBA-15-CTA interaction and syngas formation rate. Molecular Catalysis, 514, 111850. https://doi.org/10.1016/j.mcat.2021.111850

Our SBA-15-CTA mesoporous materials developed in citric acid (CTA), instead of traditional HCl intermediate, was used to support CeO2 doped nickel catalysts in methane dry reforming reaction. Results revealed that SBA-15-CTA had a high capacity for hosting CeO2 (up to 30 wt.%), which had strong interaction with Ni species, leading to a high reduction temperature of NiO at 442 oC. XANES analysis verified that Ni species were much more stable over Ce doped SBA-15-CTA than un-doped ones, which helped the Ni species maintain their metallic state. As demonstrated through TPSR analysis, CH4 and CO2 was converted to syngas at a high rate at a low initiation temperature over Ce doped Ni/SBA-15-CTA catalysts. Despite both catalysts having similar performance, Ni/30CeO2-SBA-15-CTA yielded a much lower coke deposition rate (4.9% vs 22.4% on Ni/10CeO2-SBA-15-CTA). A desirable endurance to metal sintering and carbon elimination rate was achieved over 5Ni/15CeO2-SBA-15-CTA catalyst, owing to the high concentration of oxygen vacancy coupled with the high amount of Ce3+.

Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)

This research is supported by core funding from: A*STAR Institute of Chemical Engineering and Science (ICES)
Grant Reference no. :

https://oar.a-star.edu.sg/communities-collections/articles/20698

2468-8231

Institute of Chemical and Engineering Sciences