Pt和CeO<sub>2</sub>助剂协同改性Ni/SBA-15催化剂用于正十二烷水蒸气重整制氢研究

摘要采用乙二醇辅助浸渍法制备了负载型Ni/SBA-15催化剂，并通过正十二烷水蒸气重整反应考察了催化剂的制氢活性及稳定性。探究了助催化剂Pt和CeO₂及反应条件对Ni/SBA-15催化剂催化正十二烷水蒸气重整制氢的活性及稳定性的影响。通过氮气吸附脱附等温测试、H₂-程序升温还原、透射电子显微镜、扫描电子显微镜等手段对催化剂的结构及性质进行了表征。结果表明：助催化剂CeO₂和Pt具有分散活性组分Ni的作用，Pt使催化剂的还原温度向低温区移动，因而CeO₂和Pt均具有提高催化剂活性及稳定性的作用。当两者同时进行改性时，正十二烷的转化率可达到100%，产氢速率达到5 200 μmol/min，且120 min内不失活。

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	刘军瑜
	肖周荣
	张香文

关键词：水蒸气重整；氧化铈； SBA-15；正十二烷；积炭

Abstract： Ni supported on SBA-15 was prepared via ethylene-glycol-assisted impregnation method and the performance of the as-prepared catalyst was tested by n-dodecane steam reforming. Pt and CeO₂ used as promoter and reaction condition affected the performance of Ni/SBA-15 in n-dodecane steam for hydrogen production. Various techniques including nitrogen adsorption-desorption, H₂-TPR, TEM, XRD, and TG/DTG were employed to characterize the fresh and spent catalysts. Results show that the Pt and CeO₂ used as promoter could enhance the dispersion of Ni. Pt promoted Ni/SBA-15 could reduce the reduction temperature, thus increase the activity and stability for n-dodecane steam reforming. Pt and CeO₂ co-promoted Ni/SBA-15 showed the complete conversion of n-dodecane and was stable for hydrogen production (5 200 μmol/min).

Keywords： steam reforming； ceria； SBA-15； n-dodecane； carbon deposition

Received 2018-09-04;

Corresponding Authors: 刘军瑜,E-mail:2694197969@qq.com。 Email: 2694197969@qq.com

About author: 刘军瑜(1969-)男,工程师,研究方向为燃料及其应用。

引用本文:

刘军瑜, 肖周荣, 张香文.Pt和CeO₂助剂协同改性Ni/SBA-15催化剂用于正十二烷水蒸气重整制氢研究[J]. 化学工业与工程, 2019,36(5): 1-10

Liu Junyu, Xiao Zhourong, Zhang Xiangwen.Pt and Ceria Promoted Ni/SBA-15 for n-Dodecane Steam Reforming for Hydrogen Production[J]. Chemcial Industry and Engineering, 2019,36(5): 1-10

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