%P 145-155
%T Carbon nanofiber-based copper/zirconia catalyst for hydrogenation of CO2 to methanol
%A I.U. Din
%A M.S. Shaharun
%A A. Naeem
%A S. Tasleem
%A M.R. Johan
%I Elsevier Ltd
%V 21
%D 2017
%R 10.1016/j.jcou.2017.07.010
%O cited By 48
%L scholars8355
%J Journal of CO2 Utilization
%K Carbon; Carbon dioxide; Catalyst activity; Catalysts; Chemisorption; Copper; High resolution transmission electron microscopy; Hydrogenation; Inductively coupled plasma; Optical emission spectroscopy; Synthesis gas manufacture; Temperature programmed desorption; Transmission electron microscopy; X ray diffraction; X ray photoelectron spectroscopy, Catalyst characterization; Inductively coupled plasma-optical emission spectrometry; Linear relationships; Methanol synthesis; Promoter effect; Reaction conditions; Reaction temperature; Slurry reactor, Methanol
%X 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 25 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 180 °C, pressure of 3.0 MP and 0.020 g/mL of the catalyst, the conversion of CO2 and the yield of methanol were 10 and 25 g/kg.h, respectively. Surface area of the metallic copper was increased from 8.1 to 9.5 m2/g with the presence of ZrO2 from 5 to 15 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.