Article
Engineering, Chemical
Suresh S. Jain, Ganapati D. Yadav
Summary: The study systematically investigated the kinetics and mechanism of ionic liquid catalyzed solvent less liquid-phase O-methylation reaction. The reaction was found to be pseudo zero order with respect to p-cresol and first order with respect to DMC, with the type of cation and anion affecting the catalytic activity of ionic liquids. Tetra butyl phosphonium bromide ionic liquid showed excellent performance in terms of activity, selectivity, reusability, recyclability, and stability.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2021)
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
Engineering, Chemical
Junteng Ma, Weihua Shen, Wenxuan Wei, Yunjin Fang
Summary: The catalytic activity of an ionic liquid catalyst decreased during the transesterification reaction of propylene carbonate with methanol to dimethyl carbonate. This deactivation was attributed to the interaction between the strong basic sites of the catalyst and the carbonyl compounds present in the reaction mixture. The presence of water accelerated this deactivation process by generating OH- ions, which reacted with the carbonyl structures in the reaction mixture to form inactive HCO3- compounds, leading to catalyst deactivation. A plausible mechanism for this deactivation was proposed.
CHEMICAL ENGINEERING & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Baoqin Wu, Yao Sheng, Linkai Zhou, Runduo Hong, Lifan Zhang, Xinfeng Ren, Xiujing Zou, Xingfu Shang, Xionggang Lu, Xueguang Wang
Summary: The O-methylation of catechol using dimethyl carbonate and APO catalysts was studied for the production of guaiacol. The P/Al molar ratio and catalyst calcination temperature were found to significantly affect the catalytic performance. APO (P/Al = 0.7) showed the highest catalytic activity and stability.
Article
Chemistry, Applied
Davide Dalla Torre, Mattia Annatelli, Fabio Arico
Summary: Dimethyl isosorbide (DMI) is a bio-based solvent that can replace conventional dipolar media for green purposes. Previous methods for synthesizing DMI involve toxic halogen compounds, while a more sustainable approach is to use dimethyl carbonate (DMC), which is biodegradable and less toxic. This study reports the synthesis of DMI using DMC chemistry promoted by heterogeneous acid catalysts for the first time, optimizing reaction conditions and exploring the reaction mechanisms.
Article
Chemistry, Physical
Jing Ding, Peiru Wang, Yuting He, Linyan Cheng, Xue Li, Cheng Fang, Hongping Li, Hui Wan, Guofeng Guan
Summary: By synthesizing porous sulfonyl binuclear carbonate poly(ionic liquid)s (SC-PILs), the efficient catalytic reaction of diluted CO2 with epoxides and methanol can be achieved, providing a better choice for high-value utilization of diluted CO2.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Fei Chen, Wensheng Wei, Yunsheng Gao, Yuxin Wang, Zizhen Yan, Zhanguo Zhang, Haiming Yu, Guangwen Xu, Lei Shi
Summary: Ionic liquid [Emim]IM with high thermal stability and strong basicity was synthesized and used as a catalyst for the direct synthesis of dimethyl carbonate (DMC). The [Emim]IM catalyst exhibited good stability and catalytic activity.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Engineering, Chemical
Chao Guo, Fuqiang Wang, Jiafu Xing, Peizhe Cui
Summary: The separation of DMC/methanol/water azeotropic mixtures has been studied using organic solvents and ionic liquids. The interaction mechanisms between the components and the entrainers were explored, and the best separation sequence and process were determined based on energy and economic comparisons. The results showed that the [BMIM][Cl]-based direct extractive distillation process was the most efficient and cost-effective method.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Energy & Fuels
Ping An, Jian Shi, Yuxin Wang, Zizhen Yan, Jiaxiang Hou, Guangwen Xu, Haiming Yu, Lei Shi
Summary: Various strongly basic ionic liquids were synthesized using hydroxyethoxy anion from ethylene glycol. The alkalinity of these liquids was equivalent to sodium methoxide and they exhibited good catalytic performance in transesterification reactions. By comparing with reported catalysts, the reaction mechanism was deduced and the activation energies were determined. A new catalyst circulation process without introducing impurities was proposed and verified.
Article
Chemistry, Multidisciplinary
Yu-Fen Bao, Yi-Jie Wang, Yu-Chen Wang, Ding-Hua Liu
Summary: By studying the influence of ionic liquid base strength, we successfully synthesized a potassium imidazole (KIm) organic base catalyst with high catalytic activity and stability, solving the issue of catalyst deactivation in transesterification. The results showed that KIm performed better than most previously reported catalysts, achieving chemical equilibrium within 3 minutes and yielding 73.03% dimethyl carbonate (DMC) in the synthesis from propylene carbonate (PC) and methanol (MeOH). Moreover, the catalyst maintained its activity after ten reaction cycles, meeting the requirements for industrial production.
Article
Chemistry, Applied
Xuemin Li, Shang-Tien Tsai, Kevin C-W Wu, Owen J. Curnow, Jungkyu Choi, Alex C. K. Yip
Summary: By using different structure-directing agents and crystallization methods, it is possible to adjust the particle size of zeolites, obtain zeolites with different morphologies, and evaluate their selectivity in toluene methylation reactions.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Cristina Bilanin, Paula Escamilla, Jesus Ferrando-Soria, Antonio Leyva-Perez, Donatella Armentano, Emilio Pardo
Summary: Host-guest chemistry within metal-organic frameworks (MOFs) offers great potential for the selective synthesis of industrially relevant products and represents a powerful alternative to current heterogeneous catalysts.
DALTON TRANSACTIONS
(2023)
Article
Energy & Fuels
Kyu Min Lee, Jun Ho Jang, Mani Balamurugan, Jeong Eun Kim, Young In Jo, Ki Tae Nam
Summary: Electrochemical reduction of CO2 to produce fuel precursors and additives has traditionally been limited in product variety and overall efficiency. A recent study successfully utilized redox-neutral reactions to convert CO2 into dimethyl carbonate in methanol with high Faradaic efficiency, and expanded to diethyl carbonate. This approach shows promise in broadening the scope of products and improving efficiency through innovative design strategies.
Article
Polymer Science
Tianlin Wang, Yue Zheng, Guangren Yu, Xiaochun Chen
Summary: The study focused on the effect of ionic liquids as surfactants in modifying CoFe2O4 magnetic nanoparticles for efficient catalysis in the glycolysis of PET. The modified CoFe2O4 nanoparticles showed excellent dispersibility in ethylene glycol and achieved high conversion and yield in the reaction. The catalyst exhibited good reusability without significant decrease in catalytic activity after ten cycles.
EUROPEAN POLYMER JOURNAL
(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
Shivani S. Vedula, Ganapati D. Yadav
Summary: This study successfully developed a chitosan lignin membrane using a solvent evaporation approach for efficient removal of hazardous dye methylene blue from wastewater. The membrane exhibited high dye removal efficiency and could be recycled multiple times.
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2022)
Article
Energy & Fuels
Harri Nieminen, Pavel Maksimov, Arto Laari, Virpi Vaisanen, Ari Vuokila, Mika Huuhtanen, Tuomas Koiranen
Summary: A sorption-enhanced process for hydrogenation of CO2 to methanol was designed and investigated using mathematical modeling and techno-economic analysis. The results showed that the adiabatic configuration had lower methanol production cost.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2022)
Article
Green & Sustainable Science & Technology
Shivani S. Vedula, Ganapati D. Yadav
Summary: This study investigated the efficient removal of harmful dyes from wastewater using magnetic chitosan particles. The synthesized material exhibited high dye uptake capacity and could be easily separated and recycled with the assistance of an external magnet. The study also examined the factors influencing dye degradation and proposed the adsorption mechanism of the magnetic chitosan adsorbent.
CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY
(2023)
Article
Engineering, Chemical
Shivani S. Vedula, Ganapati D. Yadav
Summary: This paper reports the preparation and characterization of adsorptive membranes made from environmentally friendly chitosan and heteropolyacids. The membranes exhibit high adsorption efficiency for copper ions, achieving above 90% removal. The study also demonstrates the potential of using these membranes for environmentally friendly wastewater treatment.
INDIAN CHEMICAL ENGINEER
(2023)
Article
Engineering, Chemical
Apoorva M. Ranjekar, Ganapati D. Yadav
Summary: A multipurpose catalyst made of nickel and cobalt supported on silicate-based material modified by Ca and Mg was developed and used in sorption-enhanced steam reforming of (bio)-ethanol (SESRE). The catalyst was synthesized using silica sourced from rice hull ash (RHA) and showed high activity and selectivity. Various characterization techniques were used to determine the physico-chemical properties of the catalyst, and its CO2-sorption capacity and breakthrough time were measured. The catalyst was stable for 10 cycles and showed the best hydrogen output under the optimized operating conditions.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Apoorva M. Ranjekar, Ganapati D. Yadav
Summary: The efficacy of CeAlO3 perovskite as a support for a bimetal catalyst in steam reforming of methanol (SRM) was investigated. Different loadings of Cu-Zn on CeAlO3 were studied for their activity and selectivity. The superior catalyst 10%Cu-10%Zn/CeAlO3 showed high activity, selectivity, and minimal carbon deposition.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Akhil V. Nakhate, Dattatray A. Pethsangave, Ganapati D. Yadav, Surajit Some, Pradip V. Tekade
Summary: We synthesized a phosphorus grafted chitosan functionalized graphene oxide nanocomposite (PCG) as a highly effective flame retardant. The PCG-coated cloth sample exhibited excellent flame retardancy properties, retaining its original size and shape when exposed to flame and releasing only minimal smoke. It passed the vertical flammability test with a significant increase in the limiting oxygen index value.
REACTION CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Apoorva M. Ranjekar, Ganapati D. Yadav
Summary: Mesoporous silica-supported metals are effective catalysts for steam reforming of hydrocarbons. In this study, ethanol was successfully converted to hydrogen using Cu and Co bimetal catalysts supported by MCF and SBA-15. The introduction of Ce further improved the performance of the catalyst, leading to high hydrogen yield and stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Environmental
Poonam Sutar, Ramdas Kadam, Ganapati D. D. Yadav
Summary: This study aims to evaluate the environmental burdens of the six-step thermochemical Cu-Cl cycle for green hydrogen production and compare it with other nuclear-based Cu-Cl cycles. Simulations using Aspen Plus and life cycle assessment using GaBi 8 were conducted to explore the impacts of different energy sources on the ICT-OEC Cu-Cl cycle. The results highlight the significant role of energy source in hydrogen production's environmental impacts.
INTERNATIONAL JOURNAL OF LIFE CYCLE ASSESSMENT
(2023)
Article
Engineering, Chemical
Vinayak M. Kadam, Ganapati D. Yadav
Summary: In this study, a bimetallic catalyst based on nickel and copper loaded onto the MOF-5 support was used for the selective hydrogenation of furfural to cyclopentanone. By optimizing the reaction parameters, a 100% furfural conversion with a 96% CPO yield was achieved. The doping of nickel and copper resulted in a synergetic effect, improving the stability of the catalyst and the selectivity of CPO. This is a biobased clean and green synthesis method.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Chemical
Shalaka S. Mohire, Ganapati D. Yadav
Summary: In this study, a novel nanocatalyst was designed and evaluated for the selective synthesis of p-tert-butylcyclohexanol via hydrogenation. The 30% Ru-Ni (2:1) @RGO catalyst showed excellent performance, achieving 100% conversion and selectivity. The preparation and properties of the catalyst were thoroughly optimized and studied.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Shrirang Sabde, Ganapati D. Yadav, Ramani Narayan
Summary: This study investigated the hydrolytic depolymerization of polyethylene terephthalate (PET) waste using a high pressure auto-clave reactor at 240°C in the presence of a phase transfer catalyst polyethylene glycol (PEG 400) and with an excess of water. The results showed that PEG 400 was a more effective catalyst compared to zinc acetate. The conversion of PET to terephthalic acid (TPA) was found to be 99% with an initial molar ratio of 55-110 mol of water/mol PET at 240°C for 30 minutes. The yield and purity of TPA were 90% and 99.1% respectively. This research proposed a new mechanism for the hydrolysis process and demonstrated the potential for circular economy and cleaner production from waste plastic.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Multidisciplinary
Rohitkumar G. Singh, Ganapati D. Yadav
Summary: In this study, a 20% (w/w) Rb0.5Cs2.0H0.5PW12O40/MCF heterogeneous catalyst was developed for the selective synthesis of monobutyl itaconate (MIB). The catalyst exhibited superior catalytic activity and selectivity compared to other synthesized salts. Factors affecting the reaction rate were studied, and the reaction followed pseudo-second-order kinetics. The catalyst was found to be water-tolerant, robust, and reusable.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Shivani S. Vedula, Ganapati D. Yadav
Summary: This paper reports the preparation and characterization of chitosan membranes with kaolin and montmorillonite for water treatment. The results show that the chitosan/montmorillonite membranes are effective in removing copper ions from waste water.
JOURNAL OF CHEMICAL SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Ujjal Mondal, Ganapati D. Yadav
Summary: Aluminum and zirconium doped SBA-15 catalysts were prepared and physically mixed with Cu-ZnO-Al2O3 catalyst for direct synthesis of DME from CO2. The incorporation of metals in SBA-15 framework enhanced surface area and porosity. The optimum reaction conditions for DME synthesis were determined. The catalyst showed good stability and high selectivity for DME production.
REACTION CHEMISTRY & ENGINEERING
(2022)
