Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 46, Issue 74, Pages 36721-36730Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2021.09.002
Keywords
Methanol; Olefin; Zeolite; Carbon dioxide; Hydrogenation
Categories
Ask authors/readers for more resources
The development of methodologies for CO2 utilization is in high demand globally. Tandem catalysts of ZnZrOx and solid acid catalysts were proposed for one-pass synthesis of lower olefins. The pore sizes and channel dimensionality of zeolites influenced the selectivity of products, with zeolites with small pores showing potential for producing light olefins.
The development of methodologies for CO2 utilization is in high demand worldwide. Here, we propose bifunctional tandem catalysts of ZnZrOx (for CO2-to-methanol hydrogenation) and a series of solid acid catalysts (for subsequent methanol conversion to light olefins). As solid acid catalysts, we used zeolites and silicoaluminophosphates with different topologies, MOR, FER, MFI, *BEA, CHA, and ERI, confirmed by X-ray diffraction, electron microscopy, and nitrogen adsorption-desorption. They also showed the corresponding acid properties examined by ammonia adsorption. The tandem catalysts realized a one-pass synthesis of lower olefins, while no hydrocarbons were obtained using ZnZrOx only. According to the reaction test and ammonia adsorption, there seems to be no correlation between product yields and acid strength. The pore sizes and channel dimensionality of zeolites influence the selectivity of products; zeolites with small pores, such as MOR, SAPO34 and ERI, are promising, while zeolites with larger pores, such as MFI, produce heavier hydrocarbons. The results provide new insight into the design of innovative catalysts for CO2 utilization. (c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available