Alkylbenzene synthesis from benzene and syngas over a ZnCrOx/beta bifunctional catalyst

Liu, Jianchao; Xu, Hong; Dong, Jinxiang; Zhou, Ligong; Li, Xuekuan; Ge, Hui

doi:10.1039/d2re00026a

Cited by 4 publications

(1 citation statement)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, it is of commercial and scientific interest to convert excessive benzene to valuable toluene or xylene through an alkylation reaction. Current approaches mainly focus on using methanol, − syngas, − methane, , or CO 2 − as the methylation reagents to react with benzene. Among these, CO 2 -coupled benzene alkylation is considered as a doubly beneficial route, which can not only increase the production of the high value-added toluene and xylene but also utilize CO 2 to alleviate the greenhouse effect …”

Section: Introductionmentioning

confidence: 99%

Integration of Nano-Sized HZSM-5 with ZnZrO_x as a Bifunctional Catalyst to Boost Benzene Alkylation with Carbon Dioxide and Hydrogen

Yin,

Fu,

et al. 2023

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Benzene alkylation with CO2/H2 is a doubly beneficial option to upgrade benzene toward valuable products, in which benzene can be converted into valuable toluene and xylene, while CO2 can be utilized as an alkylation reagent to mitigate the greenhouse effect. It is quite challenging to ascertain the critical rule of zeolite regulation for the synergistic effect in oxide-zeolite composite (OXZEO) catalysts, a series of bifunctional catalysts were investigated in this work, consisting of ZnZrO x solid solution and nano-sized HZSM-5 with uniform size distribution and distinct acid properties. Key parameters affecting the catalyst performance were analyzed and optimized in this tandem reaction, namely, the mass ratio of two components, the SiO2/Al2O3 ratio of HZSM-5, and the proximity between ZnZrO x and HZSM-5. Due to the increased active site accessibility originating from nano-sized HZSM-5, the combined selectivity of toluene and xylene reaches 94.6% at 31.3% benzene conversion, respectively. Moreover, low ethylbenzene selectivity (<1%) has been achieved. It is worth noting that the long-term stability test indicates a faster deactivation in the nano-sized HZSM-5 system as compared with the micro-sized counterpart. Based on EDS mappings, it is found that nano-sized HZSM-5 experiences a more severe metal migration issue, resulting in lower catalyst stability. The reaction mechanism with formate-methoxy intermediates and the synergistic effect of CO2 hydrogenation-alkylation were further confirmed by in situ diffuse reflectance infrared Fourier transformations spectroscopy and gas chromatography–mass spectrometry. By correlating zeolite size and acidity with catalytic performances, these findings could facilitate the further rational design of OXZEO catalysts toward CO2 catalytic conversions.

show abstract

Section: Introductionmentioning

confidence: 99%

Integration of Nano-Sized HZSM-5 with ZnZrO_x as a Bifunctional Catalyst to Boost Benzene Alkylation with Carbon Dioxide and Hydrogen

Yin,

Fu,

et al. 2023

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

Direct CO2 Methylation to Value-Added Aromatics Through Tandem Catalysis

Yang,

Li,

Qin

et al. 2024

Catal Surv Asia

View full text Add to dashboard Cite

Experimental and kinetic studies of the advantages of coke accumulation over Beta and Mordenite catalysts according to the pore mouth catalysis hypothesis

Al-Shathr

Al-Zaidi

Shehab³

et al. 2023

Catalysis Communications

View full text Add to dashboard Cite

Alkylbenzene synthesis from benzene and syngas over a ZnCrOx/beta bifunctional catalyst

Abstract: The synthesis of alkylbenzenes produced from syngas and benzene over a ZnCrOx/Beta bifunctional catalyst has been studied. Our characterization results showed that in the mixed catalyst the Beta-zeolite crystallites were...

Cited by 4 publications

References 48 publications

Integration of Nano-Sized HZSM-5 with ZnZrO_x as a Bifunctional Catalyst to Boost Benzene Alkylation with Carbon Dioxide and Hydrogen

Integration of Nano-Sized HZSM-5 with ZnZrO_x as a Bifunctional Catalyst to Boost Benzene Alkylation with Carbon Dioxide and Hydrogen

Direct CO2 Methylation to Value-Added Aromatics Through Tandem Catalysis

Experimental and kinetic studies of the advantages of coke accumulation over Beta and Mordenite catalysts according to the pore mouth catalysis hypothesis

Contact Info

Product

Resources

About

Alkylbenzene synthesis from benzene and syngas over a ZnCrOx/beta bifunctional catalyst

Abstract: The synthesis of alkylbenzenes produced from syngas and benzene over a ZnCrOx/Beta bifunctional catalyst has been studied. Our characterization results showed that in the mixed catalyst the Beta-zeolite crystallites were...

Cited by 4 publications

References 48 publications

Integration of Nano-Sized HZSM-5 with ZnZrOx as a Bifunctional Catalyst to Boost Benzene Alkylation with Carbon Dioxide and Hydrogen

Integration of Nano-Sized HZSM-5 with ZnZrOx as a Bifunctional Catalyst to Boost Benzene Alkylation with Carbon Dioxide and Hydrogen

Direct CO2 Methylation to Value-Added Aromatics Through Tandem Catalysis

Experimental and kinetic studies of the advantages of coke accumulation over Beta and Mordenite catalysts according to the pore mouth catalysis hypothesis

Contact Info

Product

Resources

About

Integration of Nano-Sized HZSM-5 with ZnZrO_x as a Bifunctional Catalyst to Boost Benzene Alkylation with Carbon Dioxide and Hydrogen

Integration of Nano-Sized HZSM-5 with ZnZrO_x as a Bifunctional Catalyst to Boost Benzene Alkylation with Carbon Dioxide and Hydrogen