The Influence of Temperature and Pressure Variation on the Reactivity of Multimetallic-Zeolite Hybrid Catalyst for Methanol Synthesis from Carbon Dioxide

• Main Authors: Hadi, A. (Author), Syed-Hassan, S.S.A (Author), Zahiruddin Ramli, M. (Author)
• Format: Article
• Language: English
• Published: IOP Publishing Ltd, 2020
• Online Access: View Fulltext in Publisher; View in Scopus

 The potential of Cu/Zn/Al/Zr - ZSM-5 zeolite hybrid catalyst, prepared by using the newly-improvised technique, namely ultrasonic spray precipitation (USP) is being explored in converting CO2 into methanol. In this study, the effect of reaction temperature (400-560K) and pressure (20-50 bar) towards catalytic activity were investigated. This technique had influenced the formation of ultrafine particles (75 nm) with relatively high BET surface area (167 m2 g-1) and both Cu surface area (12.5 m2 g -1) as well as Cu dispersion (8.88 %). TPD profile of H2 and CO2 revealed that this catalyst possess a multiple adsorption states at low (353-383 K) and high (653-858 K) temperature region. Reactivity - wise, an increment of pressure had improved the CO2 conversion and methanol selectivity with maximum value of 35.5 % and 28 %, respectively. In contrast, the exothermic nature of CO2 hydrogenation reaction had retarding both CO2 conversion and methanol selectivity at temperature higher than 523 K with the highest value for both were 36.3 % and 20.7 %, respectively. © Published under licence by IOP Publishing Ltd.