Abstract
ABSTRACT
CO
2
hydrogenation to gasoline offers a promising route for addressing energy challenges and enabling the effective utilization of carbon resources. However, the efficient conversion of CO
2
to gasoline remains a significant challenge due to insufficient hydrogen activation capacity on existing metal oxide/zeolite tandem catalysts, as well as low selectivity of gasoline among the reaction products. In this work, we develop a tandem catalytic system comprising GaZrO
x
and Ga‐substituted ZSM‐5 (Ga‐ZSM‐5) that achieves high CO
2
conversion and high gasoline yield in CO
2
hydrogenation. The optimized tandem catalyst, GZO‐700/Ga‐Z5(50), achieves a CO
2
conversion of 17.2% with a C
5+
selectivity of 83.2% at 320°C and 3 MPa, while maintaining low selectivities for CH
4
(x
component is optimized to exhibit appropriate Ga‐H coverage and O‐vacancy concentration, which synergistically promotes H
2
dissociation, H
2
migration, and CO
2
activation, leading to enhanced CO
2
conversion and gasoline production. Furthermore, the incorporation of Ga into the ZSM‐5 framework in place of Al effectively reduces the acid strength and Brønsted/Lewis acid ratio while increasing the acid density, thereby significantly boosting the formation of C
5+
hydrocarbons. The decrease in the acid strength of the catalyst also suppresses carbon deposition and, thus results in more than a twofold increase in the catalyst lifetime.