Article
Chemistry, Physical
Elrasheed Elhaj, Huajun Wang, Enaam A. Al-Harthi, Waseem A. Wani, Sahar Sallam, Nasser Zouli, Mohd Imran
Summary: In this study, one-pot glycidol synthesis was achieved by trans-esterification between glycerol and dimethyl carbonate using commercially available sodium methoxide as a catalyst. A high glycerol conversion rate of 99% and a remarkable glycidol yield of 75% were obtained under specific reaction conditions. Sodium methoxide could be recycled and reused with minimal decrease in glycerol conversion. The water content in glycerol did not affect the catalyst's efficiency. A plausible mechanism for the trans-esterification was proposed.
Article
Engineering, Chemical
Jianyu Zhu, Danyang Chen, Ziqing Wang, Qin Wu, Zhili Yin, Zhong Wei
Summary: The transformation of glycerol into high value-added fine chemicals has attracted increasing attention in the biodiesel industry. Researchers successfully prepared a highly active mesoporous CaO-SBA-15 solid base catalyst for glycerol carbonate synthesis and systematically investigated its physicochemical properties and structure-activity relationships. The strong interaction between CaO and SBA-15 was found to be responsible for the excellent catalytic performance, providing more reactive sites for the reaction.
CHEMICAL ENGINEERING SCIENCE
(2022)
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, Environmental
Jialin Yu, Ke Wang, Shibo Shao, Wei Li, Shangfeng Du, Xianfeng Chen, Cong Chao, Xianfeng Fan
Summary: This paper systematically studied the influence of ionic radius, valence state, surface concentration, and basicity of dopants on the catalytic performance of La2O3 in transesterification of glycerol and dimethyl carbonate. It was found that the ionic radius and valence state of the dopants are the determining factors, while the basic site density is not crucial. Among alkali and alkaline earth metals, 25 mol% Na/La2O3 catalyst achieved the highest glycerol conversion (85%) and glycerol carbonate yield (60%). A plausible mechanism of glycerol and dimethyl carbonate transesterification on Na/La2O3 catalyst has been proposed. This research could help understand the promotional role of alkali metals and alkaline earth metals and guide future design of metal oxide catalysts.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Chunrui Han, Rui Wang, Chang Shu, Xingang Li, Hong Li, Xin Gao
Summary: This article introduces a method of using reactive distillation to recover EG and byproduct 1,2-BC, and investigates the kinetic parameters of different reaction systems. The results show that the reaction rate of EG with DMC is faster, and BC is more stable than EC. The article also compares the experimental data with the predicted results from the reaction kinetic model.
REACTION CHEMISTRY & ENGINEERING
(2022)
Article
Thermodynamics
Jingjun Liu, Dandan Pan, Qing Zhang, Yulei Guan, Bolun Yang
Summary: The equilibrium data for glycerol transesterification were measured and correlated using the NRTL model, which successfully reproduced the phase equilibrium trends of the studied systems.
FLUID PHASE EQUILIBRIA
(2022)
Article
Engineering, Environmental
Huajun Wang, Tingting Liu, Chenyang Jiang, Yidan Wang, Jingjing Ma
Summary: This study prepared a series of deep-eutectic solvents (DESs) and used them as catalysts for the synthesis of glycidol and glycerol carbonate. The results showed that the KOH:MEA(1:2) DES exhibited higher catalytic activity, and the kinetics model accurately predicted the component concentration of the reaction.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Chunyu Meng, Kunmei Su, Zhenhuan Li, Maliang Zhang
Summary: FDCA and DMFDCA are important biomass-based chemical feedstocks, with the synthesis of DMFDCA from FDCA presenting a significant challenge in avoiding side reactions. Through the use of specific catalysts, DMFDCA was successfully synthesized with an optimized yield of 76.38% and selectivity of 80.19%, providing a promising solution for the preparation of furan-based polyester monomers.
MOLECULAR CATALYSIS
(2021)
Article
Energy & Fuels
Gitanjali Pradhan, Yogesh Chandra Sharma
Summary: Glycerol carbonate is a trending value added chemical in various industries, with researchers focusing on its synthesis from glycerol as a by-product of biodiesel. The use of a highly efficient heterogeneous Mg/ZnO base catalyst for the transesterification of glycerol with dimethyl carbonate was successful in producing glycerol carbonate with high conversion rates.
Article
Chemistry, Multidisciplinary
Jitpisut Poolwong, Silvano Del Gobbo, Valerio D'Elia
Summary: Catalytic transesterification of glycerol with dimethyl carbonate using perovskites and perovskite-based mixed metal oxides (PBMMOs) was explored in this study. PBMMOs prepared via non-hydrolytic sol gel method exhibited higher surface areas and stronger basic sites compared to those produced by calcination. The most basic PBMMOs (SrTiO3-200, YNbO4-200, BaCeO3-200) showed the highest catalytic activity, with SrTiO3-200 achieving quantitative conversion of glycerol to glycerol carbonate under optimized conditions.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Physical
Piyusa P. Pattanaik, P. Mahesh Kumar, N. Raju, N. Lingaiah
Summary: The transesterification of glycerol with dimethyl carbonate to produce glycerol carbonate was studied over Fe-La mixed oxide catalysts. Catalysts with different Fe/La molar ratios were synthesized and characterized, showing that a 1:1 ratio and calcination at 550 degrees C resulted in superior activity with 71% yield of glycerol carbonate. The formation of LaFeO3 perovskite structure was found to be responsible for the high activity of the catalyst, which also exhibited unprecedented stability over 100 hours of time on stream analysis.
Article
Energy & Fuels
Wenqiang Liu, Yajuan Wang, Juan Zhang, Qingwen Shan
Summary: In this study, large particle spherical poly-ionic liquid-solid base catalyst (PILs-FL) was successfully synthesized by suspension polymerization and characterized. The optimal reaction conditions for vinyl carbonate and methanol reaction to form dimethyl carbonate (DMC) were determined. The PILs-FL catalyst exhibited high catalytic activity and stability under the optimized conditions.
Article
Chemistry, Physical
Dengfeng Wang, Dong Bai, Jie Xiong, Zheng Chen, Xueying Zhao, Hongwei Wu, Jianfeng Shan, Shuwei Wei, Xuelan Zhang
Summary: A series of Al2O3-ZrO2-nF solid solution catalysts with adjustable acidic-basic properties were fabricated by co-precipitation method. The catalyst with F/Al=1.0 exhibited appropriate acidic-basic property and achieved quantitative and selective transformation of glycerol to glycerol carbonate with a yield of 91.2%. The uniform solid solution structure ensured excellent stability of the catalyst.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Multidisciplinary
Gundabathini Sandhya Rani, Adigopula Jyotsna, Bethala L. A. Prabhavathi Devi
Summary: This study focuses on the valorization of glycerol, a major by-product from biodiesel industry, into glycerol carbonate using a carbon-based sulfated sodium catalyst. The influence of reaction parameters on the yield and selectivity of glycerol carbonate was investigated. The results showed that under optimized conditions, high yield and selectivity of glycerol carbonate could be achieved. The catalyst could be easily recovered and reused without any pre-treatment.
Article
Agricultural Engineering
Akintomiwa O. Esan, Olusegun A. Olalere, Chee-Yuen Gan, Siwaporn M. Smith, Shangeetha Ganesan
Summary: This study successfully employed the environmentally friendly green solvent DMC in the production of biodiesel from a cheap waste feedstock PFAD, achieving a maximum biodiesel yield of 89.50% at optimized reaction conditions. By determining the percentage contribution of individual parameters on biodiesel yields, this study contributes to the sustainable production of biodiesel.
BIOMASS & BIOENERGY
(2021)
Article
Chemistry, Physical
Ming-Yi Chen, Ngoc Thanh Thuy Tran, Ahmed Abubakar Alao, Wen-Dung Hsu
Summary: This study demonstrates the significance of surface Pt atom arrangement for the efficiency of ORR in PEMFCs and reveals the correlation between Pt-Pt average distance and O2 dissociation barrier. Furthermore, the study discovers a robust correlation between the level of the catalyst's d-band center and O2 adsorption energy. High-entropy alloy substrates provide potential for controlling Pt arrangement and O2 dissociation barrier.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Eduardo C. Atayde Jr, Babasaheb M. Matsagar, Yu-Cheng Wang, Kevin C. -W. Wu
Summary: This study presents the first application of an acidic MOF, Sulfated MOF-808, in catalyzing the HAA reactions of furan oligomers for the production of biofuel precursors. The catalyst showed high yield, selectivity, and recyclability, making it versatile for different starting materials.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Maria do Carmo Rangel, Francieli Martins Mayer, Soraia Jesus de Oliveira, Sergio Gustavo Marchetti, Fabricio Luiz Faita, Doris Ruiz, Giovanni Saboia, Mariana Kieling Dagostini, Jonder Morais, Maria do Carmo Martins Alves
Summary: This study developed a new catalyst by investigating the effect of magnesium on the catalytic properties of hematite in ethylbenzene dehydrogenation. The catalyst showed important differences in activity, selectivity, and stability, making it a promising candidate for commercial applications.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yanjun Li, Qian Wang, Hui Tian, Mingyuan Zhu, Yuanyuan Liu
Summary: A novel strategy using microwave-assisted precipitation was proposed to prepare defective CsH3PMo11VO40 catalyst for the oxidation of methacrolein to methacrylic acid. Microwave treatment accelerates crystallization, increases vanadyl species content, and forms defective Keggin structures, thereby enhancing the oxidation capacity of the catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Rajeshwari Athavale, Sailee Gardi, Fatima Choudhary, Dayanand Patil, Nandkishor Chandan, Paresh More
Summary: In this study, a novel acidic ionic liquid catalyst was prepared and used for the synthesis of bis-indolyl methane derivatives. The catalyst exhibited short reaction times, easy purification, and reusability.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Masatomo Hattori, Takato Hattori, Masakuni Ozawa
Summary: Cu-added gamma-Al2O3 catalysts were prepared with varying Cu loadings and the effects of copper oxidation states on catalytic activity were investigated. The results showed that the addition of copper increased the catalyst activity, but excessive copper loading decreased catalytic activity. XRD and TEM analysis indicated the formation of a solid solution of copper oxide species on the surface of gamma-Al2O3. XAS and TPR data demonstrated variations in copper oxidation states among the catalysts.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liwei Fang, Shiyang Niu, Shengsen Wang, Yiqing Lu, Yuanhui Cheng
Summary: In this study, PtNi alloy on nitrogen-doped carbon and SnO2 dual-support was designed to modulate the metal-support interaction, resulting in improved catalytic activity and stability for oxygen reduction reaction. The SnO2/PtNi/NC catalyst exhibited a strongly coupled interface, enhanced electron transfer, and higher half-wave potential compared to PtNi/NC and commercial Pt/C.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura
Summary: This study investigates the catalytic performance of a composite catalyst composed of ZnZrOX and H-zeolite for the hydrogenation of CO2. The deactivation of the composite catalyst is influenced by ion exchange of Zn2+ and/or coke, with their effects differing based on the zeolite structure. Separating the grains of the composite catalyst can prevent deactivation.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Laura Proano, Christopher W. Jones
Summary: In this study, NiGa alloy particles supported on CeO2, ZrO2, and ZrO2-CeO2 solid solutions were prepared and characterized. The nature of the support was found to have a significant influence on the catalyst's activity and selectivity, with the crystalline structure of ZrO2 having the greatest impact. Pure ZrO2 showed the highest methanol selectivity and CO2 conversion at high Zr:Ce ratios. In equimolar and Ce-rich conditions, basic sites and oxygen vacancies were found to be the key parameters affecting methanol production.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liyan Zhang, Yinze Yang, Leilei Zhou, Fengyu Zhao, Haiyang Cheng
Summary: 1,6-Hexamethylenediamine was successfully synthesized via the reductive amination of 1,6-hexanediol using a Ru/PRL(x)-Al2O3 catalyst. The highly dispersed and anchored Ru species, formed by 1,10-phenanthroline (PRL), played a crucial role in the catalytic reaction. The formation of new acid-base pairs, electron deficient Ru species, and smaller nanoparticles contributed to the improved catalytic performances of the Ru/PRL-Al2O3 catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Gyorgy Safran, Valeria La Parola, Leonarda Francesca Liotta, Gregor Zerjav, Matevz Roskaric, Albin Pintar
Summary: This study investigates the catalytic and structural changes caused by the addition of 0.25 wt% indium in a 3% Ni/CeO2-Al2O3 catalyst prepared by impregnation method. The results show that the addition of indium can decrease the activity of the catalyst, but it improves its stability and reduces coking.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Ankush Kularkar, Vaibhav Vilas Khedekar, Sachin D. Chaudhari, Mudavath Ravi, Sadhana S. Rayalu, Penumaka Nagababu
Summary: Efficiently addressing the challenges of photocatalytic CO2 reduction to CH3OH is crucial. This study developed Zn-BTC MOF and its composites with CaIn2S4, achieving highly efficient and robust photocatalytic CO2 reduction to CH3OH under ambient conditions, using H2O2 as the hydrogen source. Among the composites, ZMCIS4 demonstrated excellent performance with a CH3OH evolution of 49100 μmol/g.cat and a quantum efficiency of approximately 78.41%. The enhanced performance was attributed to the production of nascent hydrogen atoms (H center dot) through the photo-splitting of H2O2 on the ZMCIS surface.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Dan Liu, Yudong Li, Chengyu Wang, Haiyue Yang, Rong Wang, Shujun Li, Xiaohui Yang
Summary: In this study, a self-supporting three-dimensional porous Co3O4 nanobelt array decorated on nickel foam (P-Co3O4 -NBA@NF) electrode with numerous active sites was successfully constructed for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA). The P-Co3O4 -NBA@NF electrode demonstrated high conversion efficiency, selectivity, and Faraday efficiency, as well as remarkable long-term stability. This research provides a promising electrocatalyst for biomass conversion.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yimin Li, Enggah Kurniawan, Fumiya Sato, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato
Summary: In this study, several silica-alumina catalysts modified with Ag were examined for the dehydration of 1,3-butanediol to 1,3-butadiene. Among them, an amorphous silica-alumina catalyst (SAL-3) modified with Ag showed the highest improvement in catalytic activity and stability when operated in H2 flow. The generation of reversible acid sites was found to be the reason behind the enhanced activity and stability of this Ag/SAL-3 catalyst. The effects of various parameters on the catalytic activity of Ag/SAL-3, such as reaction temperature, contact time, Ag content, and carrier gas, were investigated.
APPLIED CATALYSIS A-GENERAL
(2024)