Article
Green & Sustainable Science & Technology
Shivali Arora, Vijayalakshmi Gosu, U. K. Arun Kumar, Verraboina Subbaramaiah
Summary: The present study investigated the catalytic activity of heterogeneous catalyst for transesterification of glycerol into glycerol carbonate. The study found that lithium impregnated on MCM-41 framework showed better catalytic activity, leading to an increase in the average pore diameter. The optimal conditions for glycerol carbonate yield were determined as 5% Li impregnation, calcination at 450°C, reaction temperature of 90°C for 3 hours, achieving a 93.14% yield.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Chemical
Zhenhao Shen, Chongwei Ma, Darui Wang, Junlin He, Hongmin Sun, Zhirong Zhu, Weimin Yang
Summary: ZSM-5@MCM-41 core-shell composite materials prepared via a multi-cycle-sol-gel coating strategy show enhanced shape selectivity for p-DEB in benzene alkylation with ethylene. However, the coating of mesoporous MCM-41 shell accelerates catalyst deactivation, requiring optimization of reaction conditions in a fixed bed reactor.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Polymer Science
Houda Douba, Smain Sabour, Lakhdar Benatallah, Meriem Fizir, Ourida Mohammedi
Summary: In this study, titanium-containing MCM-41 was synthesized and used as a catalyst for the oxidation of secondary alcohol. Characterization techniques such as FT-IR, BET, XRD, SEM-EDX, and Raman spectroscopy were used to analyze the catalysts and the results showed successful insertion of Ti into the MCM-41 framework. The catalytic performance of Ti-MCM-41 and Ti/Al-MCM-41 was evaluated, with Ti directly inserted into mesoporous silica gel showing better performance and Ti/Al-MCM-41 prepared by impregnation exhibiting high catalytic activity and regeneration ability.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2023)
Article
Chemistry, Physical
Chuanyu Yang, Zhongwen Dong, Weifeng Chu, Yanan Wang, Dongpu Zhao, Fucun Chen, Wenjie Xin, Xiangxue Zhu, Shenglin Liu, Longya Xu
Summary: A series of beta zeolite catalysts were prepared with controllable particle sizes and similar Si/Al ratios by introducing imidazole (IMD) into the synthesis system, showing high activity and conversion rates in the liquid-phase transalkylation of DEB with Bz. The moderate and strong Bronsted acid sites of beta-IMD0.5 were identified as the active sites for the reaction, with external acid sites playing a significant role in the reaction due to their short diffusion path and fine accessibility.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Fengwei Huang, Huimin Hao, Wenlong Sheng, Xiaoyun Dong, Xianjun Lang
Summary: Ti-incorporated mesoporous materials, such as Ti-MCM-41, have been used to anchor visible light-capturing dyes like ARS for selective photocatalytic oxidation of organic sulfides. This study demonstrated that electron transfer mediated by TMA improved the stability of ARS and resulted in highly selective formation of sulfoxide products. The use of trifluoroethanol solvent facilitated the stability of TMA and enhanced the selectivity of the target products.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Polymer Science
Yuanyuan Qin, Xiu Wang, Minxin Shi, Yuhua Huang, Xiaogang Liu, Xiancai Li
Summary: In this study, La-IIP was prepared using APTES as the functional monomer, reamed MCM-41 as the carrier, and epichlorohydrin as the crosslinking agent. The adsorption behavior and mechanism of La-IIP were investigated, showing strong selectivity for La(III) with stability and reusability. Overall, La-IIP demonstrated excellent adsorption capacity and potential for practical applications.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2022)
Article
Chemistry, Physical
Agnieszka Wroblewska, Marcin Kujbida, Grzegorz Lewandowski, Adrianna Kaminska, Zvi C. Koren, Beata Michalkiewicz
Summary: This study achieved high selectivity epoxidation of 1,5,9-cyclododecatriene under the catalysis of Ti-MCM-41 by adjusting reaction conditions, obtaining high reaction conversion rate and selectivity.
Article
Chemistry, Inorganic & Nuclear
Muthumanickam Shenbagapushpam, Thennila Muthukumar, Sathiya Mahakrishnan, Selvakumar Kodirajan
Summary: An efficient, mild, and reusable catalytic hydroacylation and hydroamination reactions were developed using heterogeneous Ti(IV) anchored MCM-41 catalyst from various aryl, heteroaryl, aliphatic aldehydes as well as aryl and aliphatic amines with dialkyl azodicarboxylate. The catalyst showed excellent yields, a wide substrate scope, and para-selectivity with unprotected amines.
Article
Chemistry, Multidisciplinary
Fei Gao, Cailin Ji, Shougui Wang, Weiwen Wang, Jipeng Dong, Changqing Guo, Yuwen Gao, Guanghui Chen
Summary: A new adsorbent based on sterically hindered amine (AMPD) was prepared for efficient CO2 capture. The modified mesoporous silicon MCM-41 showed improved CO2 capture performance, including adsorption capacity, selectivity and cycling stability. The isosteric heat of CO2 adsorption on the MCM-41@AMPD-7 material was also evaluated.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Xu Zhang, Tao Du
Summary: In this study, different types of MCM-41 synthesized from rice husk ash were tested as polyethyleneimine (PEI) supports for CO2 capture. The effects of various factors on the adsorption performance were examined. Results showed that PM41 had superior adsorption capacity and rate compared to M41, and PM41Ax further enhanced the adsorption performance. Additionally, the presence of water vapor increased the adsorption capacity.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Construction & Building Technology
Hao Zhang, Haitao Zhao, Song Mu, Jingshun Cai, Yu Xiang, Jiawei Wang, Jinxiang Hong
Summary: The addition of carboxylic acid ammonium salt improves the durability of concrete by changing the pore structure and surface properties, enhancing water resistance ability. This provides important guidance for improving the application performance of hydrophobic agents in practice.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Pharmacology & Pharmacy
Tatiana A. Fedotcheva, Olga P. Sheichenko, Nadezhda I. Fedotcheva
Summary: Agrimoniin, a polyphenol with antioxidant and anticancer activities, has been found to influence mitochondrial functions through various pathways, including apoptosis activation and mitochondrial function stimulation.
Article
Engineering, Chemical
Shivali Arora, Vijayalakshmi Gosu, Verraboina Subbaramaiah, Tian C. Zhang
Summary: The rice husk-derived MCM-41 catalyst incorporated with 5 wt.% cobalt showed a higher GLc yield of 60.2% due to its optimal basicity. By adjusting conditions, a high GLy conversion rate of 98.7% and GLc yield of 94.1% were achieved in the batch reactor with the transesterification reaction taking place at 90 degrees C for 2 hours.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
David W. Flaherty, Ohsung Kwon, E. Zeynep Ayla, David S. Potts
Summary: Liquid-like fluids condensed within micropores of titanosilicates stabilize transition states and enhance alkene epoxidation, leading to increased turnover rates and product selectivities. The condensed fluids within Ti-BEA zeolite pores are significantly more abundant in materials with higher silanol densities. These effects demonstrate the importance of solvent condensation in micro porous catalysts, even in the absence of a bulk liquid phase.
Article
Chemistry, Physical
Mingwei Zhang, Linlin Liu, Li Wang, Xiangwen Zhang, Guozhu Li
Summary: This study investigates the mechanism of hydrocracking of long-chain paraffins catalyzed by Pt/ZSM-23. By adjusting the distribution and accessibility of acid sites, the selectivity, pathway, and mechanism of the reaction are revealed. The applicability of the pore-mouth mechanism is confirmed through experiments, and the shape selectivity of the MTT skeletal structure is studied using a combined experimental-theoretical approach.
Article
Engineering, Chemical
Qi Yang, Weikang Dai, Maoshuai Li, Jie Wei, Yi Feng, Cheng Yang, Wanxin Yang, Ying Zheng, Jie Ding, Mei-Yan Wang, Xinbin Ma
Summary: This study develops heterogeneous Cu catalysts for the selective synthesis of ethylene glycol via batch liquid-phase hydrogenation of glycolaldehyde. SiO2 supported Cu, fabricated by ammonia evaporation, enables to catalyze the C=O bond hydrogenation with retaining the C-O bond intact, yielding higher selective hydrogenation activity with ethylene glycol selectivity up to 99.8%. A synergistic effect between Cu+ and Cu0 facilitates the selective adsorption/activation of glycolaldehyde on Cu+ sites and the dissociation of H2 on Cu0 sites, bringing a remarkable improvement in the selective hydrogenation performance.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Qiao Zhao, Xiaoxue Han, Haoting Liang, Yue Wang, Jing Lv, Mei-Yan Wang, Shouying Huang, Xinbin Ma
Summary: Both appropriate support and promoter decoration are important for improving the performance of Fe-based catalysts in Fischer-Tropsch Synthesis (FTS). This study utilized KOH chemical activation to modify N-doped carbon nanosheets supported Fe catalysts, achieving simultaneous support modification and promoter introduction. The effects of KOH activation on pore structure, N configuration, and residual K were investigated. The results showed that KOH activation enriched micro-porosity, improved Fe dispersion, and regulated N configuration. The combination of pyrrolic N sites and suitable K residuals contributed to electron donation, promoting Fe carburi-zation and increasing C2-C4= productivity. This finding provides an activation method for preparing N-doped carbon supported metal catalysts.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Xiao Wang, Lin Guo, Jing Lv, Maoshuai Li, Shouying Huang, Yue Wang, Xinbin Ma
Summary: China's increasing bioethanol production capacity makes the conversion of ethanol-to-jet fuel (ETJ) promising. This study used process simulation to model two novel ETJ processes combining corn cob gasification, syngas-to-ethanol, and ethanol-to-jet fuel. Life cycle assessment (LCA) was performed to evaluate energy consumption and greenhouse gas emissions of ETJs in China. The results showed that the ETJ pathway with corn cob gasification plus fermentation had the lowest energy consumption and GHG emissions, with 370.05 KJ/MJ jet fuel and 31.66 gCO2eq/MJ jet fuel, respectively. Given the scarcity of life cycle assessments for ETJs in China, this study can assist policymakers in determining the path for China's sustainable aviation fuel (SAF) development.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Physical
Xiaoxue Han, Jing Lv, Shouying Huang, Qiao Zhao, Yue Wang, Zhenhua Li, Xinbin Ma
Summary: The conversion of syngas to liquid fuels and chemicals using Fischer-Tropsch synthesis is a promising alternative route. In this study, carbon-encapsulated nanoparticles were synthesized to control particle size and improve catalytic activity. The catalytic performance of these nanoparticles (Fe@C) was found to be superior to conventional carbon-supported nanoparticles (Fe/C). By tuning the particle size, a peak in iron time yield was obtained, suggesting that particle size plays a significant role in catalytic performance. This study provides insights into the size effect on Fe-based catalytic Fischer-Tropsch synthesis.
Article
Multidisciplinary Sciences
Dawei Yao, Yue Wang, Ying Li, Antai Li, Ziheng Zhen, Jing Lv, Fanfei Sun, Ruoou Yang, Jun Luo, Zheng Jiang, Yong Wang, Xinbin Ma
Summary: The authors present a facile method for scalable synthesis of stable supported Cu cluster catalysts by atomic diffusion of Cu from supported Cu nanoparticles to CeO2 at a low temperature. The resulting Cu clusters exhibit high yield of intermediate product in consecutive hydrogenation reactions due to their balanced adsorption and dissociation abilities. This scalable synthesis strategy brings stable Cu cluster catalysts closer to practical semi-hydrogenation applications.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Xiaoxue Han, Qiao Zhao, Huiyong Gong, Chongyang Wei, Jing Lv, Yue Wang, Mei-yan Wang, Shouying Huang, Xinbin Ma
Summary: In this study, Fe-oxide interfaces were constructed to investigate their effect on phase transformation and Fischer-Tropsch synthesis (FTS) performance. By correlating performance to the composition of iron species, the crucial role of Fe2.2C in high CO conversion and C5+ productivity has been confirmed. Furthermore, a heterogeneous spatial distribution of iron carbides and oxides induced by Fe-oxide interfaces was observed. This study provides insights for iron carbides formation and stability by modulating interfaces, which guides the further development of Fe-based FTS catalysts.
Article
Chemistry, Physical
Hai Liu, Boyang Li, Zhihui Liu, Zhanpeng Liang, Hongyuan Chuai, Hui Wang, Shi Nee Lou, Yaqiong Su, Sheng Zhang, Xinbin Ma
Summary: Guided by density functional theory (DFT) calculations, CeO2-SnO2 heterostructures with high stability and efficiency were synthesized by a facile electrospinning method. The proposed dynamic CeO2-mediated Sn0/Sn delta+ redox cycle mechanism improved formate selectivity during CO2 conversion. This work may provide a general strategy to design stable and efficient catalysts for practical CO2 electrolyzers.
Article
Chemistry, Physical
Ying Zheng, Qiang Wang, Qi Yang, Sikai Wang, Max Joshua Hulsey, Shipeng Ding, Shinya Furukawa, Maoshuai Li, Ning Yan, Xinbin Ma
Summary: This study tunes the local coordination environment of Rh single atoms on CeO2 through calcination, creating a highly active hydroformylation catalyst. Rh single atoms on CeO2 calcined at a high temperature exhibit more oxygen vacancies, leading to the formation of a large amount of low-coordination Rh active species that are more active for hydroformylation. The best Rh/CeO2 catalyst achieved a TOF of approximately 5000 h(-1) and 100% aldehyde selectivity in propylene hydroformylation.
Review
Energy & Fuels
Jing Gong, Shixin Hou, Yue Wang, Xinbin Ma
Summary: The dehydrogenation of cyclohexanol to cyclohexanone is an important step in the production of nylon fibers, and copper-based catalysts have shown exceptional low-temperature catalytic performance in this process. This paper reviews the research advances in active species, reaction mechanisms, factors affecting product selectivity, and deactivation behaviors of copper-based catalysts. It also provides a brief introduction to new processes and catalysts that break thermodynamic equilibrium via reaction coupling. These reviews can guide further investigations into catalysts and processes for cyclohexanol dehydrogenation.
TRANSACTIONS OF TIANJIN UNIVERSITY
(2023)
Article
Energy & Fuels
Shengkun Liu, Qiao Zhao, Xiaoxue Han, Chongyang Wei, Haoting Liang, Yidan Wang, Shouying Huang, Xinbin Ma
Summary: This study investigates the effect of the iron-zinc proximity of Fe-Zn bimetallic catalysts on CO2 hydrogenation performance. It is found that a smaller Fe-Zn distance inhibits the reduction and carburization of the Fe species and facilitates the oxidation of carbides.
TRANSACTIONS OF TIANJIN UNIVERSITY
(2023)
Article
Engineering, Environmental
Guangyuan Luo, Zhuoshi Li, Qingyun Liu, Shaoxia Guo, Xiaofeng Pei, Jing Lv, Shouying Huang, Yue Wang, Xinbin Ma
Summary: In this study, a series of Co-0-Co2C catalysts were prepared for higher alcohol synthesis (HAS). The composition of carbon-silica composites significantly affected the dispersion, phase evolution, and catalytic performance of the catalysts. The optimal catalyst exhibited enhanced selectivity and space time yield of higher alcohols, as well as superior stability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Multidisciplinary
Tianxiang Yan, Xiaoyi Chen, Lata Kumari, Jianlong Lin, Minglu Li, Qun Fan, Haoyuan Chi, Thomas J. Meyer, Sheng Zhang, Xinbin Ma
Summary: This article reviews the recent progress in electroreduction of CO2 for multicarbon synthesis, identifies the current hurdles to be resolved, and provides guidelines for future research.
Article
Chemistry, Physical
Xiaofei Wang, Shixiang Feng, Yue Wang, Yujun Zhao, Shouying Huang, Shengping Wang, Xinbin Ma
Summary: In this study, Mn-doped Cu/Al2O3 catalysts were synthesized for the liquid-phase hydrodeoxygenation (HDO) of lignin-derived anisole. Mn doping enhanced the selective deoxygenation of anisole to arenes and inhibited saturated hydrogenation on Cu/Al2O3. The modification of Cu particles with MnOx along with enhanced generation of oxygen vacancies (Ov) led to a controllable adsorption geometry of anisole, resulting in increased arenes selectivity.
GREEN ENERGY & ENVIRONMENT
(2023)
Article
Chemistry, Physical
Hai Liu, Boyang Li, Zhihui Liu, Zhanpeng Liang, Hongyuan Chuai, Hui Wang, Shi Nee Lou, Yaqiong Su, Sheng Zhang, Xinbin Ma
Summary: In this study, CeO2-SnO2 heterostructures were synthesized and exhibited a maximum formate partial current density of about 500 mA·cm-2, with an 87.1% faradaic efficiency and long-term stability in a flow cell. A dynamic CeO2-mediated Sn0/Snδ+ redox cycle mechanism was proposed based on experimental analysis. This work provides a general strategy for designing stable and efficient catalysts for practical CO2 electrolyzers.
Article
Chemistry, Physical
Hai Liu, Boyang Li, Zhihui Liu, Zhanpeng Liang, Hongyuan Chuai, Hui Wang, Shi Nee Lou, Yaqiong Su, Sheng Zhang, Xinbin Ma
Summary: Guided by density functional theory (DFT) calculations, we synthesized CeO2-SnO2 heterostructures by a facile electrospinning method, which exhibited high formate partial current density and long-term stability in a flow cell. By proposing a dynamic CeO2-mediated Sn0/Sn delta+ redox cycle mechanism, we provided a general strategy to design stable and efficient catalysts for practical CO2 electrolyzers.