化工进展 ›› 2025, Vol. 44 ›› Issue (3): 1228-1242.DOI: 10.16085/j.issn.1000-6613.2024-0450

• 化工过程与装备 • 上一篇    下一篇

顺序式模拟移动床分离煤基混合醇的Aspen色谱动态模拟

曹俊雅1(), 宋恕哲1, 贺鹏2(), 王利国2,3, 赵雪锋2, 曹妍2, 李会泉2,4   

  1. 1.中国矿业大学(北京)化学与环境工程学院,北京 100083
    2.中国科学院绿色过程与工程重点实验室,战略金属资源绿色循环利用国家工程研究中心,中国科学院过程工程研究所,北京 100190
    3.中国科学院大学中丹学院,北京 100049
    4.中国科学院大学化工学院,北京 100049
  • 收稿日期:2024-03-19 修回日期:2024-05-17 出版日期:2025-03-25 发布日期:2025-04-16
  • 通讯作者: 贺鹏
  • 作者简介:曹俊雅(1981—),女,副教授,博士生导师,研究方向为环境化工。E-mail:caojy@cumtb.edu.cn
  • 基金资助:
    国家重点研发计划(2022YFC3902204);内蒙古自治区科技重大专项(2021ZD0020)

Dynamic simulation using Aspen chromatography for sequential simulated moving bed separation of coal-based mixed alcohols

CAO Junya1(), SONG Shuzhe1, HE Peng2(), WANG Liguo2,3, ZHAO Xuefeng2, CAO Yan2, LI Huiquan2,4   

  1. 1.School of Chemical & Environmental Engineering, China University of Mining and Technology, Beijing 100083, China
    2.CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
    3.Sino-Danish College University of Chinese Academy of Sciences, Beijing 100049, China
    4.School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2024-03-19 Revised:2024-05-17 Online:2025-03-25 Published:2025-04-16
  • Contact: HE Peng

摘要:

我国煤制乙二醇产能快速扩大,过程副产混合醇高值利用是重大需求。本文针对煤制乙二醇副产混合醇分离纯化难题,提出顺序式模拟移动床(SSMB)高效分离工艺。以IPE-18为吸附剂,乙醇/水(体积比1∶9)为洗脱剂,采用Aspen chromatography软件构建了6柱SSMB模型,开展了乙二醇和1,2-丁二醇连续色谱分离动态模拟研究。以三角形理论最佳操作点为初始参数,通过单因素考察优化方法,探索了洗脱液流量和子步骤切换时间对产品纯度及产能的影响规律,获得了最优操作参数和柱内浓度分布动态变化机制。结果显示,在最优参数下,乙二醇纯度和产能分别达到98.29%和0.4303kg/d;1,2-丁二醇纯度和产能分别达到98.11%和0.0972kg/d,实现了二者的高效分离。最后,针对整体工艺开展了技术经济性分析,6柱SSMB的产品单位处理量为1.07kg/d,溶剂消耗为4.04。本文结果将对SSMB分离煤基混合醇工业化放大提供有效支撑。

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

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.

Key words: dynamic simulation, chromatography, separation, sequential simulated moving bed, ethylene glycol, 1,2-butanediol

中图分类号: 

京ICP备12046843号-2;京公网安备 11010102001994号
版权所有 © 《化工进展》编辑部
地址:北京市东城区青年湖南街13号 邮编:100011
电子信箱:hgjz@cip.com.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn