TY - JOUR
T1 - Acidity modification of ZSM-5 for enhanced production of light olefins from CO2
AU - Dokania, Abhay
AU - Chowdhury, Abhishek Dutta
AU - Ramirez, Adrian
AU - Telalovic, Selvedin
AU - Abou-Hamad, Edy
AU - Gevers, Lieven
AU - Ruiz-Martinez, Javier
AU - Gascon, Jorge
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: Funding for this work was provided by King Abdullah University of Science and Technology (KAUST). We would like to thank Dr. Jullian Vittenet for carrying out ICP measurements for all the samples.
PY - 2019/11/29
Y1 - 2019/11/29
N2 - Utilization of multi-functional catalysis is fast becoming the method of choice to boost the production of valuable chemicals from CO2. Here, we present a possible route to increase selectivity to light olefins by modifying the acidity of the zeolitic component of a multi-functional catalyst. This is carried out via incorporation of Ca on the zeolite ZSM-5 by incipient wetness impregnation. This incorporation, while straightforward, leads to reduced Brønsted acidity and the formation of multiple Lewis acidic species inside the zeolite. NMR investigations point towards incorporation of CO/ketene into the zeolite leading to the creation of surface acetate species, which augments the production of light olefins. Additionally, the suppression of oligomerization due to the reduction of Brønsted acid sites also produces more light olefins at the expense of longer chain hydrocarbons.
AB - Utilization of multi-functional catalysis is fast becoming the method of choice to boost the production of valuable chemicals from CO2. Here, we present a possible route to increase selectivity to light olefins by modifying the acidity of the zeolitic component of a multi-functional catalyst. This is carried out via incorporation of Ca on the zeolite ZSM-5 by incipient wetness impregnation. This incorporation, while straightforward, leads to reduced Brønsted acidity and the formation of multiple Lewis acidic species inside the zeolite. NMR investigations point towards incorporation of CO/ketene into the zeolite leading to the creation of surface acetate species, which augments the production of light olefins. Additionally, the suppression of oligomerization due to the reduction of Brønsted acid sites also produces more light olefins at the expense of longer chain hydrocarbons.
UR - http://hdl.handle.net/10754/660042
UR - https://linkinghub.elsevier.com/retrieve/pii/S0021951719305627
UR - http://www.scopus.com/inward/record.url?scp=85075746497&partnerID=8YFLogxK
U2 - 10.1016/j.jcat.2019.11.015
DO - 10.1016/j.jcat.2019.11.015
M3 - Article
SN - 0021-9517
VL - 381
SP - 347
EP - 354
JO - Journal of Catalysis
JF - Journal of Catalysis
ER -