A promising low pressure methanol synthesis route from CO2 hydrogenation over Pd@Zn core-shell catalysts

Fenglin Liao, Xin Ping Wu, Jianwei Zheng, Molly Meng Jung Li, Anna Kroner, Ziyan Zeng, Xinlin Hong, Youzhu Yuan, Xue Qing Gong, Shik Chi Edman Tsang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

44 Citations (Scopus)

Abstract

At present, there is no low pressure methanol synthesis from CO2/H2 with high yield despite the presence of an upstream process of aqueous phase reforming (APR) of biomass derivatives on an industrial scale for CO2/H2 production at ca. 2 MPa. This is due to the intrinsic thermodynamics of the system which leads to particularly high CO levels at low pressure through reversed water gas shift reaction (RWGS) for most studied catalysts. Here we report a new Pd@Zn core-shell catalyst that offers a significantly higher kinetic barrier to CO/H2O formation in CO2 hydrogenation to reduce the CO levels but facilitates CH3OH formation at or below 2 MPa with CH3OH selectivity maintained at ca. 70% compared to ca. 10% over industrial Cu catalysts. The corresponding methanol yield at 2 MPa reaches 6.1 gmethanol gactive metal-1 h-1, which is comparable to the best reported value among a wide variety of catalysts under 5 MPa. It is thus believed that this active Pd based catalyst opens up a promising possibility for low pressure and temperature methanol production using a renewable biomass resource for fossil-fuel-starved countries.

Original languageEnglish
Pages (from-to)270-280
Number of pages11
JournalGreen Chemistry
Volume19
Issue number1
DOIs
Publication statusPublished - 7 Jan 2017
Externally publishedYes

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution

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