在涂层催化剂上甲烷蒸汽重整的本征动力学研究  

Intrinsic Kinetics of Methane-Steam Reforming on Catalyst Coating

作　　者：漆波[1] 李隆键[1] 王锋[1] 崔文智[1] 彭川[1] 

机构地区：[1]重庆大学动力工程学院,重庆400030

出　　处：《西安交通大学学报》2009年第5期109-113,共5页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(50276073);重庆市自然科学基金资助项目(CSTC2006BB6221)

摘　　要：采用冷喷涂技术在不锈钢薄板上制备了涂层催化剂，研究了在涂层催化剂上甲烷蒸汽重整的本征动力学．涂层催化剂为Ni／产Al2O3，在消除内外扩散影响的条件下，在859．7～1018．7K范围内进行甲烷水蒸气重整的实验，并利用最小二乘法，由实验数据确定双速率动力学模型参数．一氧化碳生成速率指前因子为1．08×10^8mol／（h·g·kPa^2.06），活化能为178．98kJ／mol）二氧化碳生成速率指前因子为1．73×10^4mol／（h·g·kPa^2.06），活化能为139．00kJ／mol．F统计检验的结果表明，所得本征动力学模型的复相关指数大于0．9，且F统计量大于置信域为99％的临界F统计量的10倍以上，适用于涂层催化剂．Cold-spray technology was used to prepare catalyst coating on a stainless steel plate, and the analysis on intrinsic kinetics of methane-steam reforming on coating catalyst Ni/r-Al2O3 was performed. The experiment of methane-steam reforming in a plate micro-channel reactor was conducted at the temperature from 859. 7 K to 1 018. 7 K when the effect of internal and external diffusion on reaction was eliminated. From the experimental data, the parameters for the double rate kinetics model were determined by using least squares method to conduct linear regression.The pre-exponential factor and the apparent activation energy of carbon monoxide formation was 1.08 × 108 mol/（h · g · kPa^0. 89） and 178.98 kJ/mol, respectively, and the pre-exponential factor and the apparent activation energy of carbon dioxide formation was 1.73 ）〈 104 mol/（h · g · kPa^2.06） and 139. 00 kJ/mol. The F statistic results show that the correlation index of the intrinsic kinetics model was greater than 0.9 and the F was 10 times greater than the critical one with the confidence domain of 99%.

关 键 词：微通道反应器 甲烷蒸汽重整 本征动力学 冷喷涂 催化剂涂层 

分 类 号：TQ013.2[化学工程]