화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.18, No.2, 648-654, March, 2012
DOI10.1016/j.jiec.2011.11.063  Export Citation
Selective acetylation of glycerol over CeO2-M and SO4^(2-)/CeO2-M (M = ZrO2 and Al2O3) catalysts for synthesis of bioadditives
Padigapati S. Reddy, Putla Sudarsanam, Gangadhara Raju, and Benjaram M. Reddy†
  • Inorganic and Physical Chemistry Division, Indian Institute of Chemical Technology, Uppal Road, Hyderabad 500 607, India
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The feasibility of acetylation of glycerol with acetic acid was investigated employing CeO2-ZrO2, CeO2-Al2O3, SO4^(2-)/CeO2-ZrO2, and SO4^(2-)/CeO2-Al2O3 solid acid catalysts to synthesize monoacetin, diacetin and triacetin having interesting applications as bioadditives for petroleum fuels. Intensive physicochemical and surface characterization of the prepared catalysts were performed using XRD, BET surface area, ammonia-TPD and Raman spectroscopy techniques. Characterization results revealed that impregnated sulfate ions strongly influence the physicochemical characteristics of the investigated mixed oxide catalysts. Among various catalysts investigated, the SO4^(2-)/CeO2-ZrO2 combination catalyst exhibited superior catalytic activity under mild conditions. The effect of various parameters such as reaction temperature, molar ratio of acetic acid to glycerol, catalyst wt% and time-on-stream were studied over the SO4 ^(2-)/CeO2-ZrO2 catalyst to optimize the reaction conditions. Catalyst reusability was also carried out to understand its stability.
Keywords:Glycerol;Acetylation;Triacetin;CeO2-ZrO2 mixed oxide;Sulfate ion promoted catalyst
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