化工学报 ›› 2019, Vol. 70 ›› Issue (5): 1795-1803.DOI: 10.11949/j.issn.0438-1157.20181525

• 催化、动力学与反应器 • 上一篇    下一篇

NTP再生La改性多级孔HZSM-5及催化提质生物油的试验研究

朱勇晨(),李小华(),张小雷,胡超,董文斌,程静峰,邵珊珊   

  1. 江苏大学汽车与交通工程学院,江苏 镇江 212013
  • 收稿日期:2018-12-28 修回日期:2019-02-20 出版日期:2019-05-05 发布日期:2019-05-05
  • 通讯作者: 李小华
  • 作者简介:<named-content content-type="corresp-name">朱勇晨</named-content>(1994—),男,硕士研究生,<email>1092280926@qq.com</email>|李小华(1971—),男,博士,教授,<email>lixiaohua@ujs.edu.cn</email>
  • 基金资助:
    国家自然科学基金项目(51706090);江苏省高等学校自然科学研究重大项目(17KJA470002)

Study on regeneration of La modified multistage pore HZSM-5 by NTP and catalytic upgrading of bio-oil

Yongchen ZHU(),Xiaohua LI(),Xiaolei ZHANG,Chao HU,Wenbin DONG,Jingfeng CHENG,Shanshan SHAO   

  1. Department of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
  • Received:2018-12-28 Revised:2019-02-20 Online:2019-05-05 Published:2019-05-05
  • Contact: Xiaohua LI

摘要:

以氧气为气源,利用低温等离子体(NTP)喷射系统,在不同温度下对结焦失活的La改性多级孔HZSM-5分子筛进行再生,采用TG、XRD、Py-IR及N2吸附-脱附等测试技术对再生前后催化剂的理化性质进行表征,并利用再生催化剂进行在线催化提质生物油试验。结果表明,再生温度为250℃时,失活La改性多级孔HZSM-5分子筛再生效果最好,去除了97.4%的积炭,其表面结晶度、酸性、比表面积和孔容恢复程度最高。再生温度上升至300℃时,O3分解较多,此时O3分解已经成为积炭氧化分解的限制因素,排气中CO2和CO浓度峰值减小,失活催化剂再生效果有所下降。再生温度为250℃时,再生催化剂催化性能恢复最好,制得的生物油高位热值最大(36.48 MJ/kg),烃类含量最高(40.51%),其理化性质与新鲜催化剂制得的生物油理化性质最接近。

关键词: NTP, La改性多级孔HZSM-5, 再生温度, 生物油

Abstract:

Regeneration experiments of La modified multistage pore HZSM-5 zeolite were carried out at different regeneration temperatures by non-thermal plasma (NTP) spray system with oxygen as gas source. The physicochemical properties of La modified multistage pore HZSM-5 zeolite before and after regeneration were characterized by TG, XRD, Py-IR and N2 adsorption-desorption. The experiments of on-line catalytic upgrading of bio-oil were carried out over regenerated catalyst. The results showed that when regeneration temperature was 250℃, the deactivated La modified multistage pore HZSM-5 zeolite had the best regeneration effect, 97.4% of coke was removed, and the surface crystallinity, acidity, specific surface area and pore volume recovery were the best. When regeneration temperature rose to 300℃, the decomposition amount of O3 was more. At this time, the decomposition of O3 had become the limiting factor for oxidative decomposition of coke. The peaks of CO2 and CO concentration decreased, and the regeneration effect of deactivated catalyst declined. When regeneration temperature was 250℃, the catalytic performance recovery of regenerated catalyst was the best. The bio-oil produced by regenerated catalyst had the highest heating value (36.48 MJ/kg) and the highest hydrocarbon content (40.51%), and its physical and chemical properties were closest to that of bio-oil produced by fresh catalyst.

Key words: NTP, La modified multistage pore HZSM-5, regeneration temperature, bio-oil

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