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
Gitanjali Pradhan, Yogesh C. Sharma
Summary: This study focused on the clean catalytic approach of efficient CaO/TiO2 green nanoparticles derived from waste chicken eggshells, which showed excellent catalytic activity for glycerol carbonate synthesis. The designed catalyst exhibited ideal green chemistry metrics, providing a cheaper and more environmentally friendly option for industrial and lab-scale glycerol carbonate production.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Physical
Xu Qingli, Zhang Zhengdong, Liao Lifang, Lan Ping, Wang Rui, Chen Shoutao, Li Pize, Zhang Chenyang
Summary: The study found that temperature, space velocity, and water-to-carbon ratio play a crucial role in affecting hydrogen yield and carbon conversion during glycerol steam reforming for hydrogen production. The utilization of a two-stage fixed-bed catalytic reaction system can increase hydrogen yield and carbon conversion compared to a single-stage fixed-bed reactor, while also extending the life of the Nickel-based catalyst.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
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
Green & Sustainable Science & Technology
Ningbo Gao, Maciej Sliz, Cui Quan, Artur Bieniek, Aneta Magdziarz
Summary: The study found that a 2:1 ratio of N-2 to CO2 at 700 degrees Celsius resulted in a 25% reduction in CO2. The catalytic properties of CaO increased the concentration of H-2 in the produced syngas by up to 10%. However, a temperature of 800 degrees Celsius was too high for the carbonation reaction of CaO.
Article
Chemistry, Multidisciplinary
Avneet Kaur, Amjad Ali
Summary: The commercial CaO was modified to enhance its moisture resistance properties using aliphatic and aromatic groups, with benzyl-modified CaO catalyst showing better catalytic activity in the transesterification reaction. The modified CaO catalysts were found to resist moisture adsorption better than the native counterpart, with the 0.5-Ben/CaO catalyst forming a hydrophobic layer on the CaO surface to withstand water content in the reaction.
Article
Chemistry, Applied
Araya Chotchuang, Pawitra Kunsuk, Amornpun Phanpitakkul, Sarun Chanklang, Metta Chareonpanich, Anusorn Seubsai
Summary: This study investigated the production of glycerol carbonate using modified sodium aluminate catalysts. The results showed that the catalyst modified with calcium oxide and glycerol as a template produced the most active catalyst. By optimizing the operational parameters, a high yield of glycerol carbonate was achieved.
Article
Chemistry, Organic
Katsuhiko Takeuchi, Kazuhiro Matsumoto, Norihisa Fukaya, Kazuhiko Sato, Jun-Chul Choi
Summary: This study successfully synthesized glycerol carbonate using calcium oxide as a regenerable dehydrating agent and Zn(OTf)(2)/1,10-phenanthroline as a catalyst. Mechanical stirring effectively resolves the issue of calcium components solidification and achieves a high yield.
ASIAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Materials Science, Ceramics
Sun Yong Kwon, In-Ho Jung
Summary: The optimized Gibbs energies of all phases in the Al2O3-ZrO2, CaO-Al2O3-ZrO2, and Al2O3-SiO2-ZrO2 systems were obtained by evaluating and assessing the available thermodynamic and phase diagram data. Key phase diagram experiments were conducted to predict and reproduce the experimental data.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Yueyu Liu, Zhili Yin, Ziqing Wang, Ronglin Mou, Zhong Wei
Summary: A highly efficient catalyst for the synthesis of glycerol carbonate was successfully prepared using high surface area ZrO2-KOH sample. The structure properties of the catalyst and the effects of reaction conditions on the conversion rate were investigated.
RESEARCH ON CHEMICAL INTERMEDIATES
(2022)
Article
Metallurgy & Metallurgical Engineering
Shi-yu He, Qi-sheng Feng, Bao-hua Duan, Guang-yao Chen, Zhu Wu, Chong-he LI, Xiong-gang Lu
Summary: In this study, the phase diagram of the ZrO2-CaO-TiO2 system was investigated using the CALPHAD method, and the isothermal sections were calculated at two temperatures. The experimental and predicted phase relationships showed good agreement, validating the accuracy and reliability of the simulations. The obtained thermodynamic database provides important reference data for the development of photocatalytic and refractory materials.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Biochemistry & Molecular Biology
Mariana Alvarez Serafini, David Gonzalez-Miranda, Gabriela Tonetto, Felix Garcia-Ochoa, Miguel Ladero
Summary: The solventless transcarbonation of glycerol with other organic carbonates driven by alkaline catalysts allows the high yield production of glycerol carbonate, which serves as an advanced humectant and monomer for diverse polycarbonates. The main operational variables affecting the transcarbonation reaction of glycerol and ethylene carbonate catalyzed by zinc stearate were studied, including catalyst concentration, reagent molar ratio, and temperature. A kinetic model was fitted to the experimental data and extended to different temperatures, revealing a bimolecular and elemental reaction mechanism with interfacial behavior.
Article
Energy & Fuels
Yunji Pang, Chen Yang, Yuting Wu, Yisheng Chen, Huan Li
Summary: This study explores a method for steam gasification of biomass, and enhances the efficiency of biochar fixed bed gasification by adding catalysts. Experimental results show that adding CaO in counter-flow gasification can improve gasification intensity, while the addition of Fe2O3 can increase hydrogen production yield.
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
Environmental Sciences
Artur Bieniek, Shuzhuang Sun, Wojciech Jerzak, Chunfei Wu, Aneta Magdziarz
Summary: The global increase in CO2 emissions from fossil fuel combustion is a major challenge for the international community. An integrated carbon capture and utilization process (ICCU) using a CaO-based sorbent shows promise in reducing emissions. This study thermodynamically analyzed the performance of two CaO-based sorbents (commercial and sol-gel CaO) in one ICCU cycle and investigated the influence of temperature on CO2 conversion. The results revealed that as temperatures increased, CO2 conversion and total heat consumption decreased for both sorbents. Furthermore, the lowest entropy generation occurred at 650 degrees C for both sorbents.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
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)