期刊論文
| 學年 | 107 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2018-08-29 |
| 作品名稱 | Improvement of Dimethyl Carbonate Formation via Methanol Carbonation over Vanadium-doped Cu–Ni/AC Catalyst |
| 作品名稱（其他語言） | |
| 著者 | Chiang Chao–Lung; Lin Kuen–Song; Yu Ssu–Han |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Journal of the Taiwan Institute of Chemical Engineers 98, p.132-149 |
| 摘要 | In present study, Cu–Ni/AC and V-doped Cu–Ni/AC were prepared using an impregnation and co-impregnation methods respectively for dimethyl carbonation (DMC) formation from CH3OH carbonation at various temperatures (110, 170, and 220°C) and CO2/N2 volumetric flow ratios (1/4, 1/7, and 1/9). Effects of vanadium addition on Cu–Ni/AC intrinsic properties and catalytic performances were investigated. Decrease of Cu–Ni/AC surface acidity with vanadium addition was found with NH3–temperature programmed desorption (NH3–TPD) at 25–450°C. Furthermore, the valence shifts of metallic atoms in catalysts were found by X–ray absorption near–edge structure/extended X–ray absorption fine structure (XANES/EXAFS). Optimal reaction conditions (170°C and CO2/N2 = 1/7) with the highest CH3OH conversion (8.1%), DMC selectivity (93.2%), and DMC yield (7.5%) were confirmed in a fixed-bed column reactor. Linear regressions of the pseudo-first-order, pseudo-second-order, and third-order models referred that the largest CH3OH consumption rate constant (15.56 × 10−3 1/min, 9.29 L/mol-min), turnover number (TON = 17.89), and turnover frequency (TOF = 3.73 × 10−2 1/min) of DMC formation were acquired with V-doped Cu–Ni/AC at optimal reaction conditions. A reaction mechanism over Cu–Ni/AC or V-doped Cu–Ni/AC active sites was proposed. |
| 關鍵字 | V-doped Cu-Ni/AC; Methanol carbonation; Dimethyl carbonate; XANES/EXAFS |
| 語言 | en |
| ISSN | 1876-1070; 1876-1089 |
| 期刊性質 | 國內 |
| 收錄於 | SCI SSCI Scopus |
| 產學合作 | |
| 通訊作者 | Kuen-Song Lin |
| 審稿制度 | 是 |
| 國別 | TWN |
| 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/987654321/127695 ) |