化工进展2025，Vol.44Issue(3)：1228-1242,15.DOI:10.16085/j.issn.1000-6613.2024-0450
顺序式模拟移动床分离煤基混合醇的Aspen色谱动态模拟
Dynamic simulation using Aspen chromatography for sequential simulated moving bed separation of coal-based mixed alcohols
摘要
Abstract
The production capacity of coal to ethylene glycol in China is rapidly expanding,and the high-value utilization of by-product mixed alcohols has become a major demand.In the paper,a sequential simulated moving bed(SSMB)high-efficiency separation process was proposed for the separation and purification of mixed alcohols.In the process,the IPE-18 was selected as the adsorbent and the ethanol/water(volume ratio 1:9)was used as the eluent.A 6-column SSMB model was constructed using Aspen chromatography software.A dynamic simulation study on the continuous chromatographic separation of ethylene glycol and 1,2-butanediol was conducted.Using the optimal operating point of"triangle theory" as the initial parameter,the influence of eluent flow rate and sub-step switching time on the product purity and production capacity were explored through a single factor optimization method,and hence the optimal operating parameters and the mechanisms of dynamic change of concentration distribution in columns were obtained.The results showed that under the optimal parameters,the purity and capacity of ethylene glycol reached 98.29％and 0.4303kg/d,respectively.The purity and capacity of 1,2-butanediol could reach 98.11％and 0.0972kg/d,respectively.Consequently,the efficient separation of ethylene glycol and 1,2-butanediol was achieved.Finally,an economic analysis was carried out for the overall process,and the product unit capacity of the 6-column SSMB was 1.07kg/d with the solvent consumption of 4.04.The results of this article would provide effective support for the industrial scale up of sequential simulated moving bed separation of coal-based mixed alcohols.关键词
动态仿真/色谱/分离/顺序式模拟移动床/乙二醇/1,2-丁二醇Key words
dynamic simulation/chromatography/separation/sequential simulated moving bed/ethylene glycol/1,2-butanediol分类
化学化工引用本文复制引用
曹俊雅,宋恕哲,贺鹏,王利国,赵雪锋,曹妍,李会泉..顺序式模拟移动床分离煤基混合醇的Aspen色谱动态模拟[J].化工进展,2025,44(3):1228-1242,15.基金项目
国家重点研发计划(2022YFC3902204) （2022YFC3902204）
内蒙古自治区科技重大专项(2021ZD0020). （2021ZD0020）
