Name
Lattice oxygen-induced oxidative steam reforming of methanol: A new pathway for low-temperature hydrogen generation
Date & Time
Wednesday, October 2, 2024, 9:40 AM - 10:00 AM
Description

Oxidative steam reforming of methanol is an attractive route for auto-thermal methanol conversion with hydrogen production, but requires oxygen as feedstock for guaranteeing relatively high hydrogen quality. Here, a new pathway, lattice oxygen-induced oxidative steam reforming of methanol, is proposed, which enables low-temperature methanol activation and inherent air separation in a redox looping manner. Specifically, ASPEN Plus software was adopted to verify the feasibility of auto-thermal conversion of methanol via Cu↔Cu2O looping and provided a comprehensive understanding of the associated process via operating parameter optimization. Meanwhile, a series of CuOx/Ca2Fe2O5 (0≤x≤1) catalytic oxygen carriers (COCs) are prepared, which goes through the reduction → catalytic methanol conversion →re-oxidation. Results indicate that 40% Cu-loaded CuOx-Ca2Fe2O5 shows the highest catalytic activity of the synthesized COCs, and the presence of Ca2Fe2O5 tunes the redox activity and mobility of the lattice oxygen, obtaining a H2 production rate of 37.6 μmol·H2∙g−1·COC·s−1 at 240°C. The evolution pathway of methanol is investigated using CH3OH-pulse and in situ DRIFTS, which follows the sequence: CH3OH full oxidation →formaldehyde intermediate → methyl-formate intermediate as the amount of lattice oxygen decreases. This study applies the concept of chemical looping into auto-thermal conversion of methanol, which provide new implications for the development of low-temperature hydrogen production from methanol.

Location Name
Max Bell 252
Full Address
Banff Centre for Arts and Creativity
107 Tunnel Mountain Dr
Banff AB T1L 1H5
Canada
Abstract
1101
Session Type
Oral Presentation
Abstract ID
1101