Liquefaction and Gasification of Cellulose with Na2CO 3 and Ni in Subcritical Water at 350 °C

Z. Fang, T. Minowa, R. L. Smith, T. Ogi, J. A. Koziński

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131 Citations (Scopus)

Abstract

Cellulose decomposition without catalyst, liquefaction with Na 2CO3, and gasification with Ni were studied in an autoclave and in a 50-nL microreactor (diamond anvil cell; DAC) coupled with optical and infrared microcopy in subcritical water up to 350 °C. Solid residue was the main product for noncatalytic decomposition of cellulose, which took place mostly under heterogeneous conditions at slow heating rates (0.18 °C/s). Homogeneous conditions could be achieved at a high heating rate of 2.2 °C/s, and solid residue was still the main product, but with different structure and reaction pathways. When Na2CO3 and Ni were used, however, oil and gas were the main products, with little residue being formed. In both catalytic cases, liquefaction and gasification seemed to occur in the aqueous phase after cellulose dissolution. Different reaction mechanisms for homogeneous and heterogeneous environments are proposed. It is expected that by using a high heating rate (e.g., 2.2 °C/s), a homogeneous phase can be achieved and more oil and gas can be produced to avoid solid residue formation.

Original languageEnglish
Pages (from-to)2454-2463
Number of pages10
JournalIndustrial and Engineering Chemistry Research
Volume43
Issue number10
Publication statusPublished - 2004 May 12

ASJC Scopus subject areas

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

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