文献类型：期刊文献

中文题名：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

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

作者：刘军涛[1];倪腾亚[1];刘纪昌[1];沈本贤[1]

机构：[1]华东理工大学化学工程联合国家重点实验室,上海200237

年份：2014

卷号：45

期号：8

起止页码：71

中文期刊名：石油炼制与化工

外文期刊名：Petroleum Processing and Petrochemicals

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD_E2013_2014】；

基金：国家自然科学基金资助项目(No.21306051)

语种：中文

中文关键词：石脑油;正构烷烃;5A分子筛;模拟移动床

外文关键词：naphtha; normal paraffins; 5A molecular sieve; simulated moving-bed

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2.0MPa、操作温度170℃、石脑油质量空速0.024h-1、切换时间900s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,在优化条件下,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。
Based on molecule-scale management, using 5A molecule sieve as adsorbent, a liquidphase simulated moving bed （SMB） technology was used to separate normal paraffins from naphtha. The rules of separation process and effects 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 optimal 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 units and by 10. 2 percentage points, respectively.