|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|6456035||1419841||2017||11 صفحه PDF||سفارش دهید||دانلود رایگان|
- Novel CNFs based Cu/ZrO2 catalyst with variant zirconia concentration was investigated for CO2 hydrogenation to methanol.
- ZrO2 promotion increased number of basic sites, consequently CO2 conversion was improved.
- The 15Â wt% was found an optimum zirconia concentrations for the title reaction.
- Efficient CO2 conversion at relatively low reaction temperature.
This article describes the synthesis of methanol by the direct hydrogenation of CO2 over Cu/ZrO2 catalyst at different ZrO2 concentrations (5, 10, 15, 20 and 25Â wt.%) in a three-phase phase reactor. The techniques of N2 adsorption/desorption, x-ray diffraction, x-ray photoelectron spectroscopy, transmission electron microscopy, temperature-programmed desorption by CO2, N2O chemisorption and inductively coupled plasma optical emission spectrometry were employed for catalyst characterization. At a reaction temperature of 180Â Â°C, pressure of 3.0 MP and 0.020Â g/mL of the catalyst, the conversion of CO2 and the yield of methanol were 10% and 25Â g/kg.h, respectively. Surface area of the metallic copper was increased from 8.1 to 9.5Â m2/g with the presence of ZrO2 from 5 to 15Â wt.%. The methanol turnover frequency exhibited a linear relationship with ZrO2 concentration. Methanol synthesis rate was progressively increased with increasing fraction of dispersed copper. A comparative study with the literature revealed better activity of this novel catalyst at relatively low reaction conditions.
Journal: Journal of CO2 Utilization - Volume 21, October 2017, Pages 145-155