Conversion of hydrogen/carbon dioxide into formic acid and methanol over Cu/CuCr2O4 catalyst
學年 106
學期 1
出版（發表）日期 2017-09-14
作品名稱 Conversion of hydrogen/carbon dioxide into formic acid and methanol over Cu/CuCr2O4 catalyst
作品名稱（其他語言）
著者 Chao-Lung Chiang, Kuen-Song Lin, Hui-Wen Chuang, Chun-Ming Wu
單位
出版者
著錄名稱、卷期、頁數 International Journal of Hydrogen Energy 42(37),p. 23647-23663
摘要 Cu/CuCr2O4 catalysts were prepared by impregnation method at various calcination temperatures (300, 400, and 500 °C) and then reduced in H2 stream. The aggregated particles and decreasing surface area/pore volumes of the deactivated catalysts during HCOOH and CH3OH formations were also observed. Particularly, the EXAFS data showed that first shells of Cu atoms transforms from Cu–O to Cu–Cu after catalytic reactions, their bond distances and coordination numbers are quite different, respectively. It revealed that metallic Cu atoms are one of the important active species over catalyst surface at different reaction temperatures having many unoccupied binding sites for HCOOH and CH3OH formations. Additionally, the optimal calcination temperature for Cu/CuCr2O4 catalysts was demonstrated at 400 °C that attributed to its strongest acidity and basicity. The catalytic reactions in the duration of HCOOH and CH3OH preparation were proposed that were composed of HCOOH formation, CH3OH formation, and CH3OH decomposition happening at CuCr2O4, Cu, and CuO active sites, respectively. The highest CO2 conversion (14.6%), HCOOH selectivity/yield (87.8/12.8%), and TON/TOF values (4.19/0.84) were obtained at 140 °C and 30 bar in 5 h, respectively. Optimal rate constant (2.57 × 10−2 min−1) and activation energy (16.24 kJ mol−1) of HCOOH formation were evaluated by pseudo first-order model and Arrhenius equation, respectively.
關鍵字 Carbon dioxide, Hydrogenation, Formic acid, Copper-chromium catalyst, EXAFS XANES
語言 en
ISSN
期刊性質 國外
收錄於 SCI Scopus
產學合作
通訊作者 Kuen-Song Lin
審稿制度 是
國別 NLD
公開徵稿
出版型式 ,電子版
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/127396 )

SDGS 氣候行動,可負擔的潔淨能源,產業創新與基礎設施