Zr0.5Ti0.5O2的添加对超临界裂解RP-3催化剂性能的影响

引用本文: 焦毅, 秦莉晓, 李雄健, 王佳, 王健礼, 朱权, 李象远, 陈耀强. Zr_0.5Ti_0.5O₂的添加对超临界裂解RP-3催化剂性能的影响[J]. 物理化学学报, 2013, 29(10): 2255-2262. doi: 10.3866/PKU.WHXB201308271 shu

Citation: JIAO Yi, QIN Li-Xiao, LI Xiong-Jian, WANG Jia, WANG Jian-Li, ZHU Quan, LI Xiang-Yuan, CHEN Yao-Qiang. Influence of Adding Zr_0.5Ti_0.5O₂ on the Performance of Supercritical Cracking Catalyst for RP-3[J]. Acta Physico-Chimica Sinica, 2013, 29(10): 2255-2262. doi: 10.3866/PKU.WHXB201308271 shu

Zr_0.5Ti_0.5O₂的添加对超临界裂解RP-3催化剂性能的影响

焦毅 ^1, ,
秦莉晓 ^2, ,
李雄健 ^2, ,
王佳 ^2, ,
王健礼 ^1, ,
朱权 ^2, ,
李象远 ^2, ,
陈耀强 ^1,

基金项目:
国家自然科学基金(91016002) (91016002)

四川大学优秀青年学者科研基金(2013SCU04A05) (2013SCU04A05)

国家高技术研究发展计划项目(863)(2006AA01A119) (863)(2006AA01A119)

高超声速冲压发动机技术重点实验室开放基金(20120103013)资助 (20120103013)

摘要:

采用共沉淀法制备了Zr_0.5Ti_0.5O₂载体材料,将其掺杂在CeO₂-Al₂O₃ (CA)基催化剂中, 并对其催化活性进行了超临界裂解测试, 采用全自动吸附仪、X射线衍射(XRD)、透射电镜(TEM)、程序升温脱附(TPD)等方法对催化剂进行了表征. 实验结果表明, 催化剂能够明显降低裂解反应的温度, 600 ℃ CA基催化剂产气率是热裂解的2.8倍, 掺杂Zr_0.5Ti_0.5O₂载体材料的CA基催化剂是热裂解的4.0倍, 650 ℃时, 掺杂Zr_0.5Ti_0.5O₂载体材料的CA基催化剂热沉提高了0.55 MJ·kg^-1. BET结果表明, 掺杂Zr_0.5Ti_0.5O₂载体后催化剂出现双孔结构, 部分小孔的出现使得乙烯的选择性提高; NH₃-TPD结果表明, 掺杂Zr_0.5Ti_0.5O₂载体材料后, 催化剂强酸位的酸量增加了4.0倍,催化剂表现出更强的表面酸性和更集中的强酸酸中心密度, 有利于裂解多产烯烃.

关键词:

English

Influence of Adding Zr_0.5Ti_0.5O₂ on the Performance of Supercritical Cracking Catalyst for RP-3

1.
1 Key Laboratory of Green Chemistry and Technology of the Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China;
2 College of Chemical Engineering, Sichuan University, Chengdu 610064, P. R. China
Received Date: 18 June 2013
Available Online: 26 September 2013
Fund Project:
国家自然科学基金(91016002)

四川大学优秀青年学者科研基金(2013SCU04A05)

国家高技术研究发展计划项目(863)(2006AA01A119)

高超声速冲压发动机技术重点实验室开放基金(20120103013)资助

Abstract:

Zr_0.5Ti_0.5O₂ was prepared by co-precipitation and tested for its catalytic performance under supercritical conditions when mixed with a CeO₂-Al₂O₃ (CA) base catalyst. The catalysts were characterized with an automatic adsorption instrument (BET method), X-ray diffraction (XRD), transmission electron microscopy (TEM), and temperature programmed desorption (TPD). It was found that Zr_0.5Ti_0.5O₂ significantly lowered the temperature of the cracking reaction, and increased the thermal cracking gas rate by a factor of 2.8 times as large as that at 600 ℃ for the CAbase catalyst. The gas rate was increased by a factor of 4.0 times when it was doped into the CAbase catalyst, and the heat sink increased by 0.55 MJ·kg^-1 over that of thermal cracking at 650 ℃. BET results show that the Zr_0.5Ti_0.5O₂-doped CAbase catalyst has a double-pore structure that enhances ethylene selectivity. NH3-TPD result indicates that the acidity of the catalyst increased by 4.0 times, indicating improved surface acidity conducive to alkene generation.

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

Zr_0.5Ti_0.5O₂的添加对超临界裂解RP-3催化剂性能的影响

English

Influence of Adding Zr_0.5Ti_0.5O₂ on the Performance of Supercritical Cracking Catalyst for RP-3

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