Adsorption equilibrium and kinetics of methyl acetate/methanol and methyl acetate/water mixtures on zeolite 5A.
Adsorption equilibrium and kinetics of methyl acetate/methanol and methyl acetate/water mixtures on zeolite 5A.
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DOI：
10.1016/j.cej.2013.01.042
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发表时间：
2013-03
影响因子：
15.1
通讯作者：
Abraham Casas;M. Ramos;Á. Pérez
中科院分区：
文献类型：
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作者：
Abraham Casas;M. Ramos;Á. Pérez
通过甘油三酯的化学酯化生产生物柴油需要过量的醋酸甲酯，一旦反应完成，就必须回收并中和催化剂。因此，需要对乙酸甲酯进行净化步骤，以去除甲醇和水等污染物。本研究选择在5A沸石上吸附纯化乙酸甲酯。为了获得平衡和动力学数据，在间歇系统中进行了乙酸甲酯/甲醇和乙酸甲酯/水的吸附。在这两种情况下，平衡行为都符合Langmuir等温线。选择303.15K的吸附温度可以在不影响吸附动力学的情况下提高吸附量。突破曲线表明吸附在乙酸甲酯提纯中的可行性。
Biodiesel production through chemical interesterification of triglycerides requires an excess of methyl acetate that must be recovered once finished the reaction and neutralized the catalyst. Therefore, a purification step of the methyl acetate is needed to remove contaminants such as methanol and water. In this work, the methyl acetate purification by the adsorption on zeolite 5A was selected. In order to obtain the equilibrium and kinetic data, the adsorption of methyl acetate/methanol and methyl acetate/water solutions was carried out in a batch system. In both cases, the equilibrium behavior was shown to fit a Langmuir isotherm. Adsorption temperature of 303.15K was chosen in order to increase the adsorption capacity with a negligible reduction on adsorption kinetics. Breakthrough curves showed the feasibility of the adsorption in the methyl acetate purification.