ZnO-ZnCr2O4 composite prepared by a glycine nitrate process method and applied for hydrogen production by steam reforming of methanol

Chung Lun Yu, Subramanian Sakthinathan, Guan Ting Lai, Chia Cheng Lin, Te Wei Chiu, Ming Che Liu

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

To address climate change, the energy crisis, and global warming, hydrogen (H2) can be used as a potential energy carrier because it is clean, non-toxic and efficient. Today, the mainstream industrial method of H2 generation is steam reforming of methanol (SRM). In this process, a zinc-based commercial catalyst is usually used. In this work, a ZnO-ZnCr2O4 catalyst was successfully synthesised by the glycine nitrate process (GNP) and developed for use in H2 production by SRM. The specific surface area, porous structure and reaction sites of the zinc-based catalyst were effectively increased by the preparation method. The as-combusted ZnO-ZnCr2O4 composite catalyst had a highly porous structure due to the gas released during the GNP reaction process. Moreover, according to the ZnO distribution and different G/N ratios, the specific surface area (SBET) of the as-combusted ZnO-ZnCr2O4 catalyst varied from 29 m2 g−1 to 46 m2 g−1. The ZnO-ZnCr2O4 composite catalyst (G/N 1.7) exhibited the highest hydrogen production, 4814 ml STP min−1 g-cat−1, at a reaction temperature of 450 °C without activation treatment. After activation, the ZnO-ZnCr2O4 composite catalyst achieved hydrogen production of 6299 ml STP min−1 g-cat−1 at a reaction temperature of 500 °C. The hydrogen production performance of the ZnO-ZnCr2O4 composite powder was improved by the uniform addition of ZnO to ZnCr2O4. Based on the performance, this ZnO-ZnCr2O4 composite catalyst has great potential to have industrial and economic impact due to its high efficiency in hydrogen production.

Original languageEnglish
Pages (from-to)22097-22107
Number of pages11
JournalRSC Advances
Volume12
Issue number34
DOIs
Publication statusPublished - Aug 2022

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering

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