Synthesis of TAME, ETBE, and MTBE Using Heteropolyacid Catalyst

헤테로폴리산 촉매를 이용한 TAME, ETBE 및 MTBE 합성반응의 연구

  • Park, Jin-Hwa (Dept. of Chemical Engineering, College of Eng., Chonnam National University) ;
  • Yi, Yong-Woo (Institute for Laser Engineering, Kyung Hee University)
  • 박진화 (전남대학교 공과대학 화학공학과) ;
  • 이용우 (경희대학교 레이저공학연구소)
  • Received : 1996.11.04
  • Accepted : 1997.06.04
  • Published : 1997.08.10

Abstract

Synthetic reaction of TAME, ETBE, and MTBE compounds used largely for gasoline octane number enhancer to prevent air pollution was investigated using heteropolyacid catalyst in a fixed bed flow reactor. In the synthetic reaction of TAME, ETBE and MTBE, after hetero atom being replaced with poly atom, the activity of the catalyst, $H_4SiW_{12}O_{40}$ with coordinated bond with W and an hetero atom of Si was the highest among the catalysts tested. Also the activity depended upon the metals replaced which are related to the catalyst acidity. $FeHPW_{12}O_{40}$ and $K_3PM_{o12}O_{40}$ catalysts showed high activity in TAME synthesis, while they were not effective in ETBE and MTBE synthesis. In this study catalysts showing high activity were selected and mixed with equal weight combination of $H_4SiW_{12}O_{40}$ and $Sr_2SiW_{12}O_{40}$ ;$H_4SiW_{12}O_{40}$ and $NaH_2PW_{12}O_{40}$ ; $Fe_{1.5}PW_{12}O_{40}$ and $Mg_2SiW_{12}O_{40}$ ; $Mg_2SiW_{12}O_{40}$ and $Ba_2SiW_{12}O_{40}$. The mixed heteropolyacid catalysts showed higher TBA conversion rate and better selectivity of ETBE and MTBE than the single catalysts.

Keywords

Acknowledgement

Supported by : 포항공대

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