LixK2-xTi2O5在净化柴油机尾气中炭黑颗粒的应用

石油炼制与化工 ›› 2012, Vol. 43 ›› Issue (1): 58-61.

LixK2-xTi2O5在净化柴油机尾气中炭黑颗粒的应用

殷光松,段林海,孟秀红,宋丽娟

辽宁石油化工大学辽宁省石油化工催化科学及技术重点实验室，辽宁抚顺 113001

收稿日期:2011-06-13 修回日期:2011-08-11 出版日期:2012-01-12 发布日期:2011-12-28
通讯作者: 段林海 E-mail:lhduan@126.com
基金资助:
辽宁省教育厅资助创新团队项目

APPLICATION OF LixK2-xTi2O5 IN THE PURIFICATION OF SOOT FROM DIESEL EXHAUST

Received:2011-06-13 Revised:2011-08-11 Online:2012-01-12 Published:2011-12-28

摘要/Abstract

摘要： 以TiO2、KNO3和LiOH·H2O为原料，采用固相法制备出 n(Li)/n(K)不同的LixK2-xTi2O5(x = 0.125，0.15，0.20)催化剂。利用XRD对催化剂结构进行了表征，并通过程序升温反应研究了其在不同条件下氧化炭黑颗粒的催化活性。结果表明：少量Li+掺杂的LixK2-xTi2O5结构与K2Ti2O5基本一致；Li0.15K1.85Ti2O5在上述LixK2-xTi2O5系列中催化活性最高，炭黑起燃温度210 ℃，峰值温度290 ℃，比传统贵金属(如Pt-ZSM5)、过渡金属(如Co,Ba,K/ZrO2)等催化剂性能有明显提高；催化剂和炭黑在紧密接触方式下比松散接触方式下的催化活性高。

Abstract: LixK2-xTi2O5(x=0.125, 0.15, 0.2) samples were synthesized by solid-phase method using TiO2, KNO3 and LiOH·H2O as raw materials. The prepared catalysts were characterized by XRD, and their catalytic activities of soot oxidation were evaluated using TPR system under various conditions. Results showed that the structure of LixK2-xTi2O5 doped with a little Li+ was basically the same as K2Ti2O5; Li0.15K1.85Ti2O5 exhibited the highest catalytic activity among the three LixK2-xTi2O5 samples, its ignition temperature of soot was 210 ℃ and the peak temperature was 290 ℃. Furthermore, its catalytic activity of soot oxidation was significantly higher than some conventional noble metal catalyst (such as Pt-ZSM5), transition metal catalyst (such as Co,Ba,K/ZrO2) and others. Besides, its catalytic activity is higher under catalyst and soot in packed condition than in loose condition.

殷光松段林海孟秀红宋丽娟. LixK2-xTi2O5在净化柴油机尾气中炭黑颗粒的应用[J]. 石油炼制与化工, 2012, 43(1): 58-61.