Enhancement of CO2 Adsorption and Separation for Non-porous Zn/Co Azolate Frameworks via Ethanol-induced Structural Transformation
學年 107
學期 2
出版（發表）日期 2019-05-01
作品名稱 Enhancement of CO2 Adsorption and Separation for Non-porous Zn/Co Azolate Frameworks via Ethanol-induced Structural Transformation
作品名稱（其他語言）
著者 Chao–Lung Chiang, Kuen–Song Lin, Sat Septian Dwitya
單位
出版者
著錄名稱、卷期、頁數 Journal of the Taiwan Institute of Chemical Engineers, 98, 99-112
摘要 Non-porous zinc/cobalt azolate frameworks with diamond-type crystal structure (MAF–31/ZIF–D–CoM) have been synthesized in large scale with an acid-catalyzed process. Afterward, an ethanol exposure process was applied for 1, 7, and 14 days to transform MAF–31/ZIF–D–CoM into porous T–MAF–4/T–ZIF–67. Two porous zinc/cobalt azolate frameworks standards (MAF–4/ZIF–67) with sodalite-type crystal structures were prepared with a solvent-free method for comparison with T–MAF–4/T–ZIF–67. Effects of ethanol vapor exposure on structual transformation of MAF–31/ZIF–D–CoM were characterized throughly. Obvious structural transfomations between non-porous and porous zinc/cobalt azolate frameworks were found with X–ray diffraction (XRD), Field–emission scanning electron microscope (FE–SEM), and X–ray absorption near-edge structure/extended X–ray absorption fine structure (XANES/EXAFS) spectra. After the 14-day ethanol vapor exposure, the CO2 adsorption uptakes of MAF–31 and ZIF–D–CoM in low/high pressures were enhanced from 5.18 × 10−5/0.68 and 1.20 × 10−4/0.18 to 1.76 × 10−3/8.27 and 1.99 × 10−3/11.2 mmol/g, respectively. The CO2 selectivities of MAF–31/ZIF–D–CoM were also improved from 0.29/2.34 to 6.33/16.47. In addition, CO2 adsorption over zinc/cobalt azolate frameworks obeyed both Langmuir/Freundlich adsorption isotherm models with good agreements.
關鍵字 Carbon dioxide, Adsorption/separation, Zinc/cobalt azolate frameworks, Structural transformation, XANES/EXAFS
語言 en
ISSN
期刊性質 國外
收錄於 SCI SSCI 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
SDGS 氣候行動,產業創新與基礎設施