石油炼制与化工 ›› 2016, Vol. 47 ›› Issue (9): 34-40.

• 基础研究 • 上一篇    下一篇

基于结构导向集总的液体石蜡蒸汽裂解制α-烯烃分子尺度动力学模型

石利斌,沈本贤,孙辉,皮志鹏   

  1. 华东理工大学石油加工研究所
  • 收稿日期:2016-04-13 修回日期:2016-04-14 出版日期:2016-09-12 发布日期:2016-08-22
  • 通讯作者: 孙辉 E-mail:sunhui@ecust.edu.cn
  • 作者简介:2016-05-12
  • 基金资助:

    国家自然科学基金资助项目

KINETIC MODEL FOR STEAM CRACKING OF LIQUID PARAFFIN BASED ON STRUCTURE ORIENTED LUMPING METHOD

  • Received:2016-04-13 Revised:2016-04-14 Online:2016-09-12 Published:2016-08-22
  • Contact: SUN Hui E-mail:sunhui@ecust.edu.cn

摘要:

基于结构导向集总的方法建立了液体石蜡蒸汽裂解制α-烯烃的分子尺度动力学模型,构建了一个新的结构向量DB,用于精确描述烯烃分子。建立了108个分子和546个反应组成的反应网络,能够实现对液体石蜡蒸汽裂解过程单程转化率和α-烯烃产品收率的准确预测。采用该模型预测得到的液体石蜡蒸汽裂解制α-烯烃的优化工艺条件为:裂解温度660 ℃,停留时间3.5 s,水蜡摩尔比0.1。在优化工艺条件下,t通过模型预测单程转化率、α-烯烃收率和裂解气收率的相对误差分别为2.36%,1.29%,6.47%。

关键词: 液体石蜡, 蒸汽裂解, α-烯烃, 结构导向集总

Abstract:

A kinetic model of liquid paraffin steam cracking process based on structure oriented lumping is established. A new structure vectors DB is built to indicate olefin exactly. The reaction network is composed of 108 molecules and 546 reactions. The structure oriented lumping model can forecast the conversion and α-olefin yield successfully. The optimum cracking conditions of a kind of liquid paraffin are obtained by the structure oriented lumping model. The optimum conditions are 660℃, 3.5s and steam to paraffin ratio of 0.1. Under the optimal conditions, the relative errors of conversion, α-olefin yield and cracking gas yield of calculated value and experiment value are 2.36%, 1.29% and 6.47%, respectively.

Key words: liquid paraffin, steam cracking, α-olefin, structure oriented lumping