Ni@ZrO2 yolk-shell catalyst for CO2 methane reforming: Effect of Ni@SiO2 size as the hard-template

Zi-Yian Lim; Junling Tu; Yongjun Xu; Baiman Chen

doi:10.1016/j.jcis.2021.01.100

Ni@ZrO₂ yolk-shell catalyst for CO₂ methane reforming: Effect of Ni@SiO₂ size as the hard-template

J Colloid Interface Sci. 2021 May 15:590:641-651. doi: 10.1016/j.jcis.2021.01.100. Epub 2021 Feb 2.

Authors

Zi-Yian Lim¹, Junling Tu², Yongjun Xu³, Baiman Chen⁴

Affiliations

¹ Guangdong Provincial Key Laboratory of Distributed Energy Systems, School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan 523808, China.
² Guangdong Provincial Key Laboratory of Distributed Energy Systems, School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan 523808, China; Engineering Research Center of None-food Biomass Efficient Pyrolysis and Utilization Technology of Guangdong Higher Education Institutes, Dongguan University of Technology, Dongguan 523808, China.
³ Engineering Research Center of None-food Biomass Efficient Pyrolysis and Utilization Technology of Guangdong Higher Education Institutes, Dongguan University of Technology, Dongguan 523808, China.
⁴ Guangdong Provincial Key Laboratory of Distributed Energy Systems, School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan 523808, China. Electronic address: chenbm@dgut.edu.cn.

PMID: 33582366
DOI: 10.1016/j.jcis.2021.01.100

Abstract

This paper reports the usage ratio of TEOS and Zr(OBu)₄ on the formation of Ni@ZrO₂ yolk-shell for dry reforming of methane. From XPS analysis, the ZrO₂ hollow shell texture is demonstrated to be [TEOS]/[Zr(OBu)₄] dependent due to different sizes of SiO₂ produced. It found that an adequate ratio of [TEOS]/[Zr(OBu)₄] improves the catalytic conversion of dry reforming of methane. It (Ni@ZrO₂-SiZr-7.7) shows 90% conversion for CH₄ and 93% for CO₂ at a WHSV of 72,000 mLg_cat^-1h^-1 for 50 h at 800 °C with TOF_CH4 of 8.7 s^-1. It proposed that the changes in surface Si/Zr and gradual interconnecting pores contributed to its activity and stability. These finding's potential to be utilized in other high-temperature reactions.

Keywords: Dry reforming; Interconnecting pores; Size-dependent; Surface Si/Zr; Yolk-shell.