Affiliation:
1. Faculty of Chemical Engineering Kunming University of Science and Technology Kunming 650500 China
2. Zhejiang Institute of Tianjin University Shaoxing 312300 China
3. School of Chemical Engineering and Technology State Key Laboratory of Chemical Engineering Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin 300072 China
4. School of Resources and Environment Engineering East China University of Science and Technology Shanghai 200237 China
Abstract
AbstractUnder the background of “carbon peak and carbon neutrality”, the hydrogenation of carbon dioxide (CO2) to methanol (CH3OH) represents a crucial pathway for promoting green and sustainable development. In2O3 has gained attention as a promising material for CH3OH production from CO2 due to its controllable properties including morphologies, particle sizes and oxygen vacancies, along with its excellent selectivity in CO2 hydrogenation reactions. Herein, by employing various precursors, three distinct indium trioxide (In2O3) catalysts with varied morphologies and predominantly exposed crystal facets were synthesized. It is found that the In2O3 catalyst prepared using ammonia monohydrate (NH3⋅H2O) as a precipitator exhibits a primarily exposed (211) crystal facet. This catalyst demonstrates a CO2 conversion rate of 4.7 %, a selectivity of 55 %towards CH3OH, and a space velocity of 8000 ml gcat.−1 h−1, under reaction conditions of 280 °C and 3 MPa. The (211) crystal face of In2O3 is conducive to the generation of oxygen vacancies which shows exceptional active capabilities for CO2, and thus showing outstanding advantages in the selectivity towards CH3OH. The results underscore the importance of crystal facet engineering in tailoring the properties of catalysts for efficient CO2 hydrogenation to CH3OH.
Funder
Applied Basic Research Key Project of Yunnan