化工进展

• 资源与环境化工 • 上一篇    下一篇

HY和USY分子筛对模拟油品中碱性氮化物的吸附行为

徐晓宇1,孙悦1,沈健1,翟玉龙2   

  1. 1辽宁石油化工大学石油化工学院,辽宁 抚顺 113001;2神华宁夏煤业集团,宁夏 银川 750411
  • 出版日期:2014-04-05 发布日期:2014-04-05

Adsorption behavior of basic nitrides in model oil on HY and USY moleclar sieves

XU Xiaoyu1,SUN Yue1,SHEN Jian1,ZHAI Yulong2   

  1. 1School of Petrochemical Technology,Liaoning University of Petroleum & Chemical Technology,Fushun 113001,Liaoning,China;2Shenhua Ningxia Coal Industiy Group,Yinchuan 750411,Ningxia,China
  • Online:2014-04-05 Published:2014-04-05

摘要: 以HY、USY分子筛作为吸附剂,喹啉的十二烷溶液为模拟油,在间歇式微型反应釜中,进行了静态吸附脱除碱性氮化物的实验研究。考察了两种分子筛的吸附温度、剂油质量比对脱氮率的影响,并对其吸附热力学、吸附动力学进行了研究。结果表明,HY和USY分子筛最佳吸附温度分别为100 ℃和140 ℃,最佳剂油质量比为1∶30;通过吸附热力学的研究,得出两种分子筛的等温吸附曲线为H型化学吸附曲线,Langmuir等温方程拟合相关系数大于0.999,新建立的等温化学吸附方程可以很好地拟合等温吸附曲线;吸附焓变?H>0,自由能变?G0,实验条件下碱性氮化物在两种分子筛上的吸附是吸热的、自发的化学吸附过程;采用3种动力学模型对两种分子筛的吸附行为进行拟合,得出准二级动力学模型是描述两种分子筛吸附过程的最佳动力学方程,相关系数大于0.999。

关键词: HY分子筛, USY分子筛, 碱性氮化物, 等温吸附曲线

Abstract: The adsorption tests of quinoline in dodecane solution on HY and USY moleclar sieves were conducted in a batch micro-reactor. The influences of adsorption temperature and iuuratio of adsorbent to oil on denitrification were investigated. Morever,experimental study of adsorption thermodynamics and kinetics was performed. The best adsorption temperature was 100 ℃ and 140 ℃ for HY and USY moleclar sieves respectively,and the best ratio of adsorbent was 1∶30 for these two molecular sieves. Adsorption thermodynamics showed that two isotherms absorption curves of molecular sieves were H chemisorption curves. The correlation coefficients of Langmuir equation were more than 0.999. The newly established chemisorption equation could simulate isotherms absorption curves well. Adsorption enthalpy ?H>0,free energy ?G0,which showed that it was an endothermic and spontaneous chemisorption of basic nitrides on these two types of molecular sieves. Three kinetic models were used to fit adsorption behavior,and the best kinetic equation to describe the adsorption process was pseudo-second order model with correlation coefficient more than 0.999.

Key words: HY moleclar sieves, USY moleclar sieves, basic nitrides, isotherms absorption curve

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