- 作者: 蘇天寶 ; 雷敏宏
- 作者服務機構: 台灣大學化學工程系
- 中文摘要: Steam-reforming reactions of methanol over NiO/Al/sub 2/O/sub 3/ and CuO/ZnO have been investigated. Over the nickel catalyst, the reaction rate is of zero kinetic order with respect to either methanol or steam, and the activation energy is 12.4kJmol /sup -1/, whereas with copper catalyst, the rate is expressed according to the literature as kP/sub a//(1+K/sub a/P/sub a/+K/sub b/P/sub b/) in which "a" and "b" are methanol and steam, respectively. The rate-controlling step of the reaction is assigned to the dissociation of O-H bond with dehydrogenation of C-H bond proceed rapidly to form carbon oxides. With copper catalyst the intrinsic participation of a water molecule during the dehydrogenation of C-H bond leads to the formation of carbon dioxide. With nickel catalyst, the dehydrogenation proceed more rapidly than the migration of a water molecule from an alumina site to a nickel site and causes almost exclusively the formation of carbon monoxide and hydrogen at a lower reaction temperature.
- 英文摘要: --
- 中文關鍵字: Steam Reforming; Methanol; Nickel; Copper; Catalyst; Steam Reforming Reaction; Steam; Dehydrogenation
- 英文關鍵字: 蒸汽改進;甲醇;鎳;銅;觸媒;蒸氣;脫氫作用