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Indirect route and thermodynamics for glycerol carbonate synthesis from glycerol and carbon dioxide
Author(s): ZHAO Yi, HAO Rong-jie, ZHU Xiao-yu, SHEN Yan-mei
Pages: 24-
28
Year: 2013
Issue:
2
Journal: Natural Gas Chemical Industry
Keyword: glycerol; 3-chloro-1; 2-propanediol; glycidol; carbon dioxide; glycerol carbonate; glycerol; thermodynamics;
Abstract: 提出了以丙三醇制备3-氯-1,2-丙二醇(3-CPD)或缩水甘油,再与CO2反应合成丙三醇碳酸酯的间接路线.采用基团贡献法估算了部分物质的热力学函数及等压摩尔热容.利用这些估算结果和文献数据,计算了上述丙三醇衍生物与CO2合成丙三醇碳酸酯反应的焓变、吉布斯自由能变、平衡常数及常温下各反应自发进行所需的压强.结果表明,3-CPD与CO2合成过程常温下很难实现,在298.15 K~538.15 K范围,低温时其平衡常数甚至比丙三醇与CO2直接合成丙三醇碳酸酯反应的平衡常数低得多,高温时则有相同的数量级(10-9),而经缩水甘油的合成路线在热力学上具有独特优势.
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