Issue 17, 2024

Hydrogen production via methanol steam reforming using sepiolite-derived Cu-based spherical micro-mesoporous catalysts

Abstract

The development of efficient catalysts is the key challenge in methanol steam reforming (MSR), which is one of the potential technologies for hydrogen production. In this study, a spherical micro-mesoporous support (SMMS) was successfully synthesized using a sepiolite-derived silica source, and subsequently SMMS-supported Cu catalysts with different Cu contents (denoted as xCu/SMMS) and M (M = Fe, Mn or La) promoters (denoted as xCuyM/SMMS) were prepared via an impregnation method. Various characterizations demonstrated that the SMMS with a uniform micro–mesoporous structure and large specific surface area promoted the dispersion of active metals, and an appropriate content of Cu and M promoters could provide adequate reactive metallic sites and abundant oxygen vacancies (VO) and improve the interactions between the M promoters and Cu. Amongst the as-prepared catalysts, 8Cu2Mn/SMMS exhibited unique Cu–MnOx interface sites, which could inhibit the excessive oxidation of metallic Cu to supply sufficient active Cu+ sites and VO for MSR. Moreover, under the synergistic effect of VO, Cu0/Cu+ and Cu–MnOx interface sites, it presented the highest methanol conversion (96.66%) and hydrogen yield (94.49%). Furthermore, it exhibited stability up to 35 h of MSR. Additionally, the characterizations of spent catalysts demonstrated that 8Cu2Mn/SMMS possessed excellent oxidation resistance and anti-sinter capability.

Graphical abstract: Hydrogen production via methanol steam reforming using sepiolite-derived Cu-based spherical micro-mesoporous catalysts

Supplementary files

Article information

Article type
Paper
Submitted
22 Apr 2024
Accepted
12 Jul 2024
First published
31 Jul 2024

Sustainable Energy Fuels, 2024,8, 3944-3963

Hydrogen production via methanol steam reforming using sepiolite-derived Cu-based spherical micro-mesoporous catalysts

M. Chen, J. Yao, Y. Wang, D. Liang, L. Shen, C. Chen, C. Li, H. Xin, G. Yuan and J. Wang, Sustainable Energy Fuels, 2024, 8, 3944 DOI: 10.1039/D4SE00526K

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