Catalytic performance of Rh/CeO2 in the gasification of cellulose to synthesis gas at low temperature

M. Asadullah, K. Fujimoto, K. Tomishige

Research output: Contribution to journalArticle

77 Citations (Scopus)

Abstract

The gasification of cellulose has been investigated on Rh catalysts supported on CeO2, ZrO2, Al2O3, TiO2, MgO, and SiO2 at very low temperatures (723-823 K) in a laboratory-scale fluidizedbed reactor using air as a gasifying agent. Of the catalysts, only Rh/CeO2 showed the excellent catalytic performance in the cellulose gasification at above 823 K, resulting in 100% carbon conversion to gas. The details of reaction conditions that affected the performance of the catalyst have been optimized. The best results have been found at above 823 K using the total flow rate of 170 cm3 min-1 of inlet gases. The total carbon conversion was achieved when 50 mg of cellulose was used in a batch. The Rh loading of 1.2 × 10-4 mol (g of catalyst)-1 on CeO2 and W/F of 1.8 gh mol-1 were optima for the total conversion of carbon to gases. Fresh and used catalysts were characterized by a Brunauer-Emmett-Teller (BET) analysis and transmission electron microscopy (TEM). The BET surface area has been decreased from 59 to 24 m2/g during the first batch reaction; however, this value decreased to 21 m2/g during the next 20 batches. No Rh particle was observed in the TEM image of the fresh catalyst; however, in the used catalyst, it was observed, and the particle size was 1.5-2.2 nm on CEO2.

Original languageEnglish
Pages (from-to)5894-5900
Number of pages7
JournalIndustrial and Engineering Chemistry Research
Volume40
Issue number25
Publication statusPublished - 2001 Dec 12
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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