Abstract: Zeolite membrane pilot plant for dehydration was designed and developed,and subsequently deployed for vapor permeation tests of ethanol/water mixture through industrial zeolite NaA membranes fabricated by microwave heating technology,which was patented by our research group.In addition,a water permeation flux equation of zeolite NaA membranes was achieved,as well as the relationship between water flux and water concentration of feed solution or Reynolds number.After the simulation of distillation-zeolite membrane integrated process,the optimum coupling point between distillation and zeolite membrane technology was put forward,and also the influence of membrane price and life span on the total cost was explored,these can serve as important references for the industrial application of zeolite NaA membranes.Based on the results of pilot-plant tests,the construction of a zeolite membrane device for ethanol dehydration(30000 tons/year) was successfully completed,aiming at the project of hydrogenation of acetic acid to ethanol(Jiangsu Sopo Co.,Ltd.).The single set of zeolite membrane device is the largest one in China.To date,this device has been continuously operated for more than 1000h,exhibiting a good performance.

Key words: zeolite membrane, vapor permeation, ethanol dehydration, permeation flux, Reynolds number

摘要： 设计并搭建了分子筛膜脱水中试装置，对本课题组微波加热技术合成的工业级NaA型分子筛膜进行乙醇/水体系蒸汽渗透的性能研究，得到了NaA型分子筛膜的水渗透通量方程，水透量与原料液含水量、雷诺数之间的关系及变化规律。对精馏与膜分离耦合工艺进行流程模拟，提出了精馏与膜分离的最佳耦合点，并且给出了分子筛膜的价格和寿命对总费用的影响，为NaA型分子筛膜工业应用提供重要参考依据。根据中试结果，在江苏索普集团醋酸加氢制乙醇项目中建设完成了3万吨/年的分子筛膜乙醇脱水装置，是目前国内单套最大的分子筛膜脱水装置。目前，装置已连续运行超过1000h，运行结果良好。

关键词: 分子筛膜, 蒸汽渗透, 乙醇脱水, 透量, 雷诺数