通过离子交换法以分子筛为原料进行稀土元素Ce的改性，并负载贵金属Pd制备出整体式催化剂材料，利用对比实验考察了改性分子筛的孔结构、储氧量、低温碳氢吸附活性、台架储氧能力和催化活性。采用低温氮吸附(BET)、程序升温还原(TPR)、台架性能测试(AFR)和台架储氧能力(OSC)进行了表征。结果表明，改性分子筛在比表面积、孔容上有所下降，但是提高了催化剂低温碳氢的吸附活性、台架储氧能力、储氧量和催化活性。
Molecular sieve was modified by ion exchange process with Ce and monolithic catalyst loading Pd was prepared with the sieve. Investigations of pore structure, oxygen storage capacity, low temperature hydrocarbon adsorption activity, bench oxygen storage capacity and catalytic activity of modified molecular sieve were carried out. The experimental results of BET, TPR, AFR and OSC indicated that the surface area and pore volume were decreased but the low temperature HC adsorption, oxygen storage capacity and catalytic activity were improved.
参考文献
| [1] | 周扬胜.欧盟的机动车环保法规[J].世界环境,2002(01):25-28. |
| [2] | 周淑慧,高峰.国内外天然气汽车和加气站的发展现状及在我国的发展前景（二）[J].中国能源,2002(12):27-30. |
| [3] | 刘泽仁,罗钰.四川天然气汽车产业发展战略研究[J].西华大学学报（哲学社会科学版）,2008(03):60-64. |
| [4] | Sakai T B;Choi C;Osuga R et al.Purification chara- cteristics of catalytic converters for natural gas fueled automotive engine:SAE Paper,920596[R].,1991-02-04. |
| [5] | Yasutake Nagai;Takamasa Nonaka;Akihiko Suda et al.Structure analysis of Ce2-ZrO2 mixed oxids as oxygen storage promoters in automotive catalysts[J].R&D Review of Toyota CRDL,2002,37(04):20-27. |
| [6] | Li X H;Sun K P;Xu X L et al.Low-temperature catalytic combustion of methane over Pd/CeO2 prepared by deposition-precipitation method[J].CATALYSIS COMMUNICATIONS,2005,67(06):800. |
| [7] | Thomas J M;Thomas W J.Introduction to the principles of heterogeneous catalysis[M].London,UK:Academic Press,1967 |
| [8] | L.Yang;O.Kresnawahjuesa;R.J.Gorte .A calorimetric study of oxygen-storage in Pd/ceria and Pd/ceria-zirconia catalysts[J].Catalysis Letters,2001(1/2):33-37. |
| [9] | 朱保伟,陈宏德,田群,周克斌.铈锆固溶物载Pd催化剂的构造特征及其活性[J].环境化学,2004(03):241-246. |
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