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Au-NiO/TiO₂催化剂催化甲醇自热重整制氢

Au-NiO/TiO₂ Catalyst for Methanol Autothermal Reforming to Produce Hydrogen

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【Author】 Cui Bingbing~(1,2),Xu Xin~1,Luo Guohua~1,Tong Zemin~1,Chen De~3 (1.Chemical Engineering Department,Beijing Institute of Petrochemical Technology,Beijing 102617,China;2.Chemical Engineering Department,Beijing University of Chemical Technology,Beijing 10029,China;3.Department of Chemical Engineering,Norwegian University of Science and Technology,Trondheim 7491,Norway)

【机构】北京石油化工学院材料与化工学院；挪威科技大学化学工程系北京102617；北京化工大学化学工程学院；北京100029；北京102617；特隆赫姆7491；

【摘要】采用沉积-沉淀法制备了甲醇自热重整制氢Au-N iO/T iO2催化剂,并用X射线衍射、透射电子显微镜、能量色散X射线能谱对Au-N iO/T iO2催化剂进行了表征。表征结果显示,N iO可以改善载体T iO2粒子的分散度,使Au颗粒的粒径减小,Au颗粒的粒径主要分布在2~3nm;Au的负载量(质量分数)为1.63%左右。同时考察了反应温度和n(O2)∶n(CH3OH)对Au-N iO/T iO2催化剂催化甲醇自热重整制氢反应活性的影响。实验结果表明,当汽化温度为90℃、反应温度为200℃、n(O2)∶n(CH3OH)为0.30时,Au-N iO/T iO2催化剂的活性最佳,甲醇转化率和CO2选择性较高,CO含量较低。更多还原

【Abstract】 Production of hydrogen via methanol autothermal reforming on Au-NiO/TiO₂ catalyst,prepared by deposition-precipitation,was studied.The catalyst was characterized by means of XRD,TEM and energy dispersion X-ray spectrum（EDS）.NiO in the catalyst could improve dispersion of TiO₂ particles and decrease particle size of Au.Au particles were highly dispersed on support.Their mean particle size was 2-3nm.Loading amount（mass fraction）of Au was 1.63%.Effects of reaction temperatures and n（O₂） ∶n（CH₃OH）ratio on autothermal reforming of methanol were investigated.The catalyst exhibited high methanol conversion,high carbon dioxide selectivity and low content of carbon monoxide in outlet at boiloff temperature of 90℃ and reaction temperature 200℃.When（n（O₂）） ∶n（CH₃OH）in feedstock was 0.30,Au-NiO/TiO₂ catalyst showed good activity.更多还原