Selective acetylation of glycerol over CeO2–M and SO4 2 /CeO2–M (M = ZrO2 and Al2O3) catalysts for synthesis of bioadditives
Selective acetylation of glycerol over CeO2–M and SO4 2 /CeO2–M (M = ZrO2 and Al2O3) catalysts for synthesis of bioadditives
Padigapati S. Reddy(Indian Institute of Chemical Technology); Putla Sudarsanam(Indian Institute of Chemical Technology); Gangadhara Raju(Indian Institute of Chemical Technology); Benjaram M. Reddy(Indian Institute of Chemical Technology)
18권 2호, 648~654쪽
초록
The feasibility of acetylation of glycerol with acetic acid was investigated employing CeO2–ZrO2, CeO2–Al2O3, SO42 /CeO2–ZrO2, and SO42 /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 SO42 /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 SO42 /CeO2–ZrO2 catalyst to optimize the reaction conditions. Catalyst reusability was also carried out to understand its stability.
Abstract
The feasibility of acetylation of glycerol with acetic acid was investigated employing CeO2–ZrO2, CeO2–Al2O3, SO42 /CeO2–ZrO2, and SO42 /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 SO42 /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 SO42 /CeO2–ZrO2 catalyst to optimize the reaction conditions. Catalyst reusability was also carried out to understand its stability.
- 발행기관:
- 한국공업화학회
- 분류:
- 화학공학