Direct Conversion of Blast Furnace Gas to Dimethyl Ether over Cu-ZnO-Ga2O3/.GAMMA.-Al2O3 Hybrid Catalyst: Optimum Mass Ratio of the Catalyst.

• Machida Satoshi

  Graduate School, Tohoku University

• Akiyama Tomohiro

  Institute for Advanced Materials Processing, Tohoku University

• Muramatsu Atsushi

  Institute for Advanced Materials Processing, Tohoku University

• Yagi Jun-ichiro

  Institute for Advanced Materials Processing, Tohoku University

Abstract

The objective of this study is to develop a catalyst in a packed-bed reactor for direct synthesis of dimethyl ether ((CH₃)₂O, DME) from blast furnace offgas (CO-CO₂-H₂-N₂, BFG). Physically-admixed (hybrid) catalysts of Cu-ZnO-Ga₂O₃ for CH₃OH synthesis and γ-Al₂O₃ for its dehydration were experimentally studied, in which the influence of mixing ratio of the two catalysts on both yield and selectivity of DME was mainly examined for the same catalyst mass. The results showed that the developed hybrid catalyst is very effective in producing DME directly from BFG without equilibrium limit of methanol. Interestingly, the yield of DME had a significant dependence of mixing ratio, and the hybrid catalyst with only 5 mass% γ-Al₂O₃ showed the highest yield with 99.3 % selectivity of DME+methanol. This implies that methanol formation governs the rate of this series reaction (BFG→CH₃OH→DME) due to fast dehydration of methanol to DME.

Journal

• ISIJ International

  ISIJ International 37 (5), 531-535, 1997

  The Iron and Steel Institute of Japan

Keywords

• ironmaking
• blast furnace
• dimethyl ether
• methanol
• catalyst
• γ-Al₂O₃
• dehydration

Details

• CRID: 1390282681429546496
• NII Article ID: 10002455848
• NII Book ID: AA10680712
• DOI: 10.2355/isijinternational.37.531
• ISSN: 13475460
• ISSN: 09151559
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational1989/37/5/37_5_531/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed