Article
Engineering, Chemical
Siyuan Zhao, Ke Ma, Kailong He, Xiaoxun Ma, Chengyi Dai
Summary: In this study, a three-bed series connection reactor was used to achieve one-step high selectivity of ethylbenzene production from syngas and benzene. The microporous shape-selective effect of SAPO-34 inhibited the generation of toluene/xylene, while the Bronsted acid site density of ZSM-5 influenced the selectivity of ethylbenzene.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Applied
Zhiguo Yan, Dan Chen, Ling Huang, Jieqing Liu, Heqing Fu, Yang Xiao, Shaoping Li
Summary: This study investigates the diffusion behavior of key components in the alkylation reaction of benzene and methanol catalyzed by H-ZSM-5 zeolite. The presence of CH3O- intermediates in CH3-ZSM-5 zeolite enhances the diffusion of p-xylene.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Energy & Fuels
Ajuan Zhou, Jiaxing Zhang, Hong Yang, Shujie Shang, Anfeng Zhang, Chunshan Song, Xinwen Guo
Summary: This study explores the rational design of Pt/ZSM-5 bifunctional catalysts for alkylating benzene with ethane. It reveals that the Si/Al ratio of ZSM-5 regulates the dispersion and particle size of Pt, and the interaction between H+ of ZSM-5 and Pt plays a crucial role in controlling the product distribution in the reaction.
Article
Nanoscience & Nanotechnology
Zhongwen Dong, Chuanyu Yang, Dongpu Zhao, Yanan Wang, Weifeng Chu, Zhaochi Feng, Xiangxue Zhu, Wenjie Xin, Yongchen Shang, Shenglin Liu, Longya Xu
Summary: A new interzeolite transformation method has been developed for the quick synthesis of nanoaggregate catalyst CDM-5, where the formation process of ordered aluminosilicate aggregate species was revealed through UV-Raman spectra and HRTEM, SEM images.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Fatemeh Nasr Azadani, Shohreh Fatemi, Narges Salehi Ardali
Summary: A kinetic model was proposed for the benzene alkylation with ethane reaction over PtH-ZSM-5 catalyst, which accurately predicted experimental data and optimized reaction conditions to improve ethylbenzene yield.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2022)
Article
Chemistry, Physical
Jiaxing Zhang, Ajuan Zhou, Kaivalya Gawande, Guanxing Li, Shujie Shang, Chengyi Dai, Wei Fan, Yu Han, Chunshan Song, Limin Ren, Anfeng Zhang, Xinwen Guo
Summary: ZSM-5 nanosheets show promise as catalysts for diffusion-controlled catalytic reactions. In the alkylation of benzene with methanol, nanosheets with a thickness of 30 nm exhibit higher benzene conversion, xylene selectivity, and methyl selectivity, as well as a longer lifetime and lower ethylbenzene selectivity compared to nanosheets with a thickness of 300 nm. This is attributed to the shorter straight channel length, larger specific surface area, and increased mesopore volume of the nanosheets, which enhance the diffusion of reactants and products and decrease coke formation.
Article
Chemistry, Physical
Zhengpai Zhang, Tieqiang Zeng, Chunling Wei, Lei Song, Changxi Miao
Summary: This study prepared a series of Fe-K-Mg catalysts promoted with different CeO2 contents and characterized their physical properties, surface, and bulk structures using various techniques. The results showed that the bulk density and crush strength of the catalyst were closely related to the pore structure and grain size of the catalyst. The addition of Ce enhanced the catalytic activity of ethylbenzene dehydrogenation, but decreased the selectivity of styrene. The Fe-K-Mg catalyst containing 12% CeO2 exhibited the highest single-pass yield of styrene, reaching 70.9%.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Physical
Tengfei Han, Hong Xu, Jianchao Liu, Ligong Zhou, Xuekuan Li, Jinxiang Dong, Hui Ge
Summary: A Cu-ZnO-Al2O3/ZSM-5 bifunctional catalyst has been developed for the one-pass conversion of benzene and syngas to alkylbenzenes with high efficiency. The well-regulated acidity of ZSM-5 in the catalyst substantially contributed to its performance by suppressing the methanol-to-olefins (MTO) reaction. Matching the mass ratio of active components in the catalyst and the reaction temperature can effectively reduce the formation of unwanted by-products and ensure high tandem reaction performance.
Article
Chemistry, Physical
A. F. A. Rahman, A. A. Jalil, M. Y. S. Hamid, Ijaz Hussain, N. S. Hassan, Asif Hussain Khoja
Summary: This study investigates the effect of transition metals (Co, Mn and Ti) on the fibrous silica ZSM-5 zeolite (HFZ) catalyst for benzene methylation. The results show that Mn/HFZ catalyst exhibits the best performance by effectively suppressing the formation of ethylbenzene and producing high yield of toluene. The catalyst also remains active for a longer period and does not generate graphitic carbon, indicating that the enhanced methanol and benzene adsorption on the catalyst surface may contribute to its excellent catalytic performance.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Physical
Yu Chen, Guobiao Su, Xu Cheng, Tingting Du, Yu Han, Wenjiang Qiang, Bingxin Huang
Summary: Sodium-ion batteries have great potential in grid energy storage due to abundant sodium resources. The electrochemical performances are mainly determined by cathode materials, with P2-Na2/3Ni1/3Mn2/3O2 showing high capacity and stability when using Na2CO3 as Na source. Doping with Li and Mg can significantly improve cycle stability, but initial discharge capacity is reduced.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Pengfei Nie, Xuguang Liu, Pingping Zhang, Xun Yuan, Xia Li, Sen Lin, Zhengmao Yin, Zhiyi Wang
Summary: The promoted synthesis of hollow nano-sized ZSM-5 zeolite with special additives showed enhanced catalytic performance and stability in the alkylation of benzene with ethanol, making it a promising strategy for sustainable production of ethylbenzene/diethylbenzene.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Tatinaidu Kella, Debaprasad Shee
Summary: This study demonstrates the conversion of n-butanol to aromatics in one step using Ga modified HZSM5 catalysts under varying process parameters. Ga species on the catalyst act as Lewis acid sites, enhancing the dehydrogenation reaction and suppressing hydride transfer reaction. The selectivity to different aromatics is affected by process parameters. Characterization of spent catalysts confirms the deposition of polynuclear aromatics. The maximum total aromatics selectivity achieved is 76.0%.
REACTION CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Le Yin, Tingjun Fu, Bowen Li, Ruiwen Cao, Caiyan Li, Zhong Li
Summary: This study investigates the synergistic effect of oxide-zeolite composite (OXZEO) catalysts in benzene alkylation with CO2/H-2. By analyzing and optimizing key parameters, high conversion of benzene and high selectivity of toluene and xylene are achieved. The mechanism of CO2 hydrogenation-alkylation is confirmed, and it is found that nano-sized HZSM-5 has better catalyst stability compared to micro-sized HZSM-5 due to a less severe metal migration issue.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Shu Ren, Fan Yang, Chao Tian, Yinghong Yue, Wei Zou, Weiming Hua, Zi Gao
Summary: In this study, two H-ZSM-5 samples with different framework aluminum distributions were prepared using different organic structure-directing agents (OSDAs). The results showed that the choice of OSDA affected the aluminum distribution and consequently the catalytic activity. H-ZSM-5 synthesized from TPAOH showed higher activity. This study provides an efficient way to regulate the distribution of acid sites, thereby enhancing the catalytic performance of H-ZSM-5 zeolite in the targeted reaction.
Article
Nanoscience & Nanotechnology
Paratee Komen, Lappawat Ngamwongwan, Sirichok Jungthawan, Anchalee Junkaew, Suwit Suthirakun
Summary: This study investigates the role of sulfur doping on Li/Na intercalation in Ti3C2O2 MXene using first-principles calculations and kinetic Monte Carlo simulations. The results show that S-O doping can enhance electronic conductivity, improve stability and transport kinetics of ion intercalation in MXenes, providing a fundamental understanding for developing MXene-based electrode materials for Li- and Na-ion batteries.
ACS APPLIED MATERIALS & INTERFACES
(2021)
