DESIGN OF BIFUNCTIONAL CATALYST FOR LOW-TEMPERATURE HYDROGEN PRODUCTION

低温制氢双功能催化剂的设计

• 批准号: 07650942
• 负责人: IGARASHI Akira
• 金额: $ 1.41万
• 依托单位: KOGAKUIN UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650942/
• 关键词: Hydrogen Production; Steam Reforming; Zirconia Support; Rhodium; 水素構造; 低温水蒸気改質; ジルコニア; ゾル-ゲル; アルコキシド

In order to obtain a catalyst with high reactivity for hydrogen production by steam reforming, studies on the catalyst preparation and the reaction mechanism were carried out.First, ZrO_2 and ZrO_2-Y_2O_3 with a high specific surface area were produced by the sol-gel method. Rhodium particle sizes of Rh/ZrO_2-Y_2O_3 catalysts prepared by the impreganation method decreased linearly with increasing specific surface areas of ZrO_2-Y_2O_3 supports. Rh/ZrO_2-Y_2O_3 catalysts showed superior performance for the steam reforming of n-butane and the catalyic activity related to rhodium particle size.Further, in situ DRIFT and TPD experiments were made to investigate the reaction mechanism of low-temperature steam reforming over Rh/ZrO_2 catalyst. It was found that the reaction intermediate was formate species. Formate species over Rh/ZrO_2 catalyst was consumed with reaction at low temperature. It was also found the basic surface hydroxyl groups had high reactivity. The superior performance of Rh/ZrO_2 catalyst obtained by using the flow experiment seemed to be responsible for the acid-base property of this catalyst.

为了获得高活性的水蒸气重整制氢催化剂，对催化剂的制备和反应机理进行了研究：首先，采用溶胶-凝胶法制备了高比表面积的ZrO_2和ZrO_2-Y_2O_3催化剂;浸渍法制备的Rh/ZrO_2-Y_2O_3催化剂中，Rh的粒径随载体比表面积的增加而线性减小。Rh/ZrO_2-Y_2O_3催化剂对正丁烷水蒸气重整反应具有上级性能，且催化剂活性与Rh颗粒大小有关，并通过原位DRIFT和TPD实验研究了Rh/ZrO_2催化剂上低温水蒸气重整反应机理。发现反应中间体为甲酸盐物种。Rh/ZrO_2催化剂上的甲酸盐物种在低温下随反应而消耗。碱性表面羟基具有较高的反应活性。流动实验表明，Rh/ZrO_2催化剂具有良好的上级性能，这可能是该催化剂具有酸碱性的原因。

项目成果

IGARASHI Akira: Recent Development of Steam Reforming Process. Kagakukougaku no Shinpo 29, Shokubai Kougaku.Makishoten, 201 (1995)

IGARASHI Akira：蒸汽重整工艺的最新进展。

五十嵐 哲: "化学工学の進歩29 触媒工学" 槙書店, 201 (1995)

五十岚聪：“化学工程进展 29 催化剂工程” Maki Shoten, 201 (1995)

五十嵐 哲: "化学工学の進歩29 触媒工学" 槇書店, 201 (1995)

五十岚聪：“化学工程进展 29 催化剂工程” Maki Shoten, 201 (1995)

飯田 肇: "Rh/ZrO_2触媒上での低温水蒸気改質の反応機構" 触媒. 37(6). 490-493 (1995)

Hajime Iida：“Rh/ZrO_2 催化剂上的低温蒸汽重整反应机理”，催化 37(6)。

五十嵐 哲: "化学工学の進歩29 触媒工学" 槙書店, 201頁 (1995)

Satoshi Igarashi：《化学工程进展 29 催化剂工程》Maki Shoten，201 页（1995 年）