Highly Selective Transformation of CO2 + H2 into Para-Xylene via a Bifunctional Catalyst Composed of Cr2O3 and Twin-Structured ZSM-5 Zeolite

The abundant C1 source CO2 can be utilized to produce value-added chemicals through hydrogenation technology. A bifunctional catalyst consisting of reducible metal oxide Cr2O3 and acidic zeolite ZSM-5 was designed for the direct conversion + H2 into valuable aromatics, especially para-xylene (PX), via methanol-mediated pathway. twin structure (ZSM-5T), with sinusoidal channels that are predominantly exposed external surface, enhances possibility transformation methanol PX due favorable diffusion dynamic in channels. Via Cr2O3&ZSM-5T, a selectivity 28.7% space-time yield (STY) 2.5 gCH2 h−1 kgcat−1 achieved at rate 16.5%. Furthermore, we rationally modify ZSM-5T Cu species doping amorphous SiO2 shell coating (Cu-ZSM-5T@SiO2). After combining catalytic component, (18.4%) (33.8%) increased some extent, which systematically increases STY 3.0 kgcat−1. physicochemical property corresponding structure-function relationship enhancing productivity discovered. Our work provides novel design idea boost synthesis performance from hydrogenation.