Preparation and characterization of H3PW12O40/ZrO2 catalyst for carbonation of methanol into dimethyl carbonate
學年 106
學期 2
出版（發表）日期 2018-03-15
作品名稱 Preparation and characterization of H3PW12O40/ZrO2 catalyst for carbonation of methanol into dimethyl carbonate
作品名稱（其他語言）
著者 Chao Lung Chiang, Kuen Song Lin, Ssu-Han Yu
單位
出版者
著錄名稱、卷期、頁數 Research on Chemical Intermediates, 44, p.3797-3811
摘要 A H3PW12O40/ZrO2 catalyst for effective dimethyl carbonate (DMC) formation via methanol carbonation was prepared using the sol–gel method. X-ray photoelectron spectra showed that reactive and dominant (63%) W(VI) species, in WO3 or H2WO4, enhanced the catalytic performances of the supported ZrO2. The mesoporous structure of H3PW12O40/ZrO2 was identified by nitrogen adsorption–desorption isotherms. In particular, partial sintering of catalyst particles in the duration of methanol carbonation caused a decrease in the Brunauer–Emmett–Teller surface area of the catalyst from 39 to 19 m2/g. The strong acidity of H3PW12O40/ZrO2 was confirmed by the desorption peak observed at 415 °C in NH3 temperature-programmed desorption curve. At various reaction temperatures (T = 110, 170, and 220 °C) and CO2/N2 volumetric flow rate ratios (CO2/N2 = 1/4, 1/7, and 1/9), the calculated catalytic performances showed that the optimal methanol conversion, DMC selectivity, and DMC yield were 4.45, 89.93, and 4.00%, respectively, when T = 170 °C and CO2/N2 = 1/7. Furthermore, linear regression of the pseudo-first-order model and Arrhenius equation deduced the optimal rate constant (4.24 × 10−3 min−1) and activation energy (Ea = 15.54 kJ/mol) at 170 °C with CO2/N2 = 1/7 which were favorable for DMC formation.
關鍵字 Carbon dioxide, Methanol Carbonation, Dimethyl carbonate, H3PW12O40/ZrO2 catalyst, Greenhouse effect gas
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 DEU
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/987654321/127397 )