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Optimization of Catalytic Distillation for the Synthesis of Dimethyl Carbonate by Response Surface Methodology
Author(s) -
Feng Yuchen,
Guo Bao,
Tang Shixiong,
Liu Yida,
Liu Jidong,
Lv Jianhua
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202004087
Subject(s) - space velocity , catalysis , dimethyl carbonate , methanol , reactive distillation , central composite design , transesterification , response surface methodology , fractional distillation , factorial experiment , chemistry , desorption , adsorption , inorganic chemistry , materials science , chemical engineering , nuclear chemistry , distillation , chromatography , organic chemistry , selectivity , mathematics , statistics , engineering
Dimethyl carbonate (DMC) was synthesized from methanol and ethylene carbonate (EC) in a reactive distillation column by transesterification using different composite oxide catalysts. The catalysts were characterized by XRD, N 2 adsorption‐ desorption, CO 2 ‐TPD, and NH 3 ‐TPD. The results show that the Zr−Al catalyst has the most strong base sites and weak acid sites compared with other catalysts. The synergistic effect of acid‐base sites makes it show excellent catalytic performance for DMC synthesis. The operation parameters including reflux ratio, feed molar ratio, liquid hourly space velocity (LHSV) and catalyst dosage were optimized by factorial design based on response surface methodology (RSM). The best optimization conditions was: reflux ratio=5.23 : 1, feed molar ratio=6.05 : 1, LHSV=0.48 h −1 , catalyst dosage=119.04 ml, the relative error between measured value and predicted value is small, which indicated that the reliability of the optimized process is high.