基于分子管理的模拟移动床吸附分离石脑油中的正构烷烃

石油炼制与化工 ›› 2014, Vol. 45 ›› Issue (8): 71-76.

基于分子管理的模拟移动床吸附分离石脑油中的正构烷烃

刘军涛,倪腾亚,刘纪昌,沈本贤

华东理工大学化学工程联合国家重点实验室

收稿日期:2014-01-20 修回日期:2014-03-20 出版日期:2014-08-12 发布日期:2014-07-22
通讯作者: 刘纪昌 E-mail:liujc@ecust.edu.cn
基金资助:
国家自然科学基金资助项目

ADSORPTION SEPARATION OF NORMAL PARAFFINS FROM NAPHTHA BY SIMULATED MOVING BED BASED ON MOLECULE-SCALE MANAGEMENT

Jun-Tao JunLIU, ,Liu Ji-chang,Benxian Shen

Received:2014-01-20 Revised:2014-03-20 Online:2014-08-12 Published:2014-07-22
Contact: Liu Ji-chang E-mail:liujc@ecust.edu.cn

摘要/Abstract

摘要： 基于分子管理的理念，以5A分子筛为吸附剂，分离石脑油中的正构烷烃和非正构烃。考察了模拟移动床（SMB）中分子筛对正构烷烃的吸附分离规律以及循环比、分配比、脱附剂比等因素对分离效果的影响。在操作压力2.0 MPa、操作温度170 ℃、石脑油质量空速0.024 h-1、切换时间900 s的条件下，优化的模拟移动床操作条件为：循环比2.25、分配比3.00、脱附剂比4。对于正构烷烃质量分数为31.95%的石脑油，经SMB液相吸附分离后，脱附油中正构烷烃质量分数达到87.76%，吸余油中非正构烃质量分数达到97.83%。与石脑油原料相比，以脱附油作为裂解原料时的乙烯收率提高13.1百分点；吸余油研究法辛烷值提高19.2个单位，芳烃潜含量提高10.2百分点。

Abstract: Based on molecule-scale management, using 5A molecule sieve as adsorbent, a liquid-phase simulated moving bed (SMB) technology was used to separate normal paraffins from naphtha. The rules of separation process and effect of circulation ratio, distribution ratio and desorbent/naphtha flow ratio on the separation performance of SMB were investigated. Under 2.0 MPa, 170 ℃, LHSV of 0.024 h-1 and switching time of 900 s， the optimized operating conditions are：desorbent/naphtha ratio of 4, circulation ratio of 2.25 and distribution ratio of 3.00. For the feed naphtha with the normal paraffin content of 31.95%, the content of normal paraffins in desorption oil reaches 87.76%, and the content of non-normal paraffins in the raffinate is 97.83%. Compared with the naphtha feed, the ethylene yield increases by 13.1 percentage points using the desorption oil as a steam cracking feed; RON and the potential aromatics content of the raffinate increases by 19.2% and by 10.2 percentage points, respectively.

刘军涛倪腾亚刘纪昌沈本贤. 基于分子管理的模拟移动床吸附分离石脑油中的正构烷烃[J]. 石油炼制与化工, 2014, 45(8): 71-76.

Jun-Tao JunLIU Liu Ji-chang Benxian Shen. ADSORPTION SEPARATION OF NORMAL PARAFFINS FROM NAPHTHA BY SIMULATED MOVING BED BASED ON MOLECULE-SCALE MANAGEMENT[J]. Petroleum Processing and Petrochemicals, 2014, 45(8): 71-76.

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