Review
Energy & Fuels
M. Mulyatun, Jedy Prameswari, I. Istadi, W. Widayat
Summary: Research on biodiesel production utilizing heterogeneous catalysts focuses on improving production quality and sustainability, with non-food feedstocks and acid-base bifunctional catalysts considered as important factors that can significantly reduce production costs by 60-70%.
Article
Environmental Studies
Joao Paulo da Costa Evangelista, Aruzza Mabel de Morais Araujo, Amanda Duarte Gondim, Antonio Souza de Araujo
Summary: This study investigated the esterification of oleic acid using Zr-SBA-15 and SO42-/Zr-SBA-15 catalysts for biodiesel production. The results showed that the SO42-/Zr-SBA-15 catalyst had higher catalytic activity with a yield of 80.7%, meeting the specified standards.
ENERGY & ENVIRONMENT
(2023)
Article
Chemistry, Applied
Vahide Nuran Mutlu, Selahattin Yilmaz
Summary: The glycosidation of glucose with n-butanol was studied using sulphated Zr and tungstophosphoric acid incorporated SBA-15 catalysts, showing improved acidity and higher yields of butyl glucoside. The TPA-SBA-15 catalyst demonstrated the highest activity and selectivity, with stable and reusable performance. Further studies on reaction temperature and catalyst amount were conducted to optimize the reaction parameters.
Article
Engineering, Environmental
Daniel T. Oyekunle, Maulidi Barasa, Eman A. Gendy, Sieh Kiong Tiong
Summary: In recent years, biodiesel as a substitute for fossil fuels has gained increasing attention, although its production cost is higher. To reduce the cost, biodiesel has been produced from different feedstock based on local availability, but the feedstock quality limits the quality and efficiency of the transesterification process. The quality of biodiesel depends on fatty acid compositions and physicochemical properties of the oil feedstock, and the use of solid-based catalysts has been preferred due to their reusability and ease of separation. Different catalyst properties and process parameters also influence the transesterification reaction.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Review
Engineering, Environmental
Xiang Tan, Putla Sudarsanam, Jinyu Tan, Anping Wang, Heng Zhang, Hu Li, Song Yang
Summary: The development of social productive forces leads to the increasing consumption of fossil fuels, resulting in global warming and abnormal climate change. Biodiesel, produced using solid acid catalysts, is recognized as a renewable and clean energy source.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Applied
J. E. Castanheiro, J. Vital, I. M. Fonseca, A. M. Ramos
Summary: The acetalization of glycerol with hexanal was studied using sulfonic acid-functionalized mesoporous silica, showing optimal activity when the amount of sulfonic acid groups was moderate. Activity increased with the number of sulfonic acid groups until reaching a maximum, after which a decrease was observed. The catalytic stability of the [SO3H](3)-SBA-15 catalyst was evaluated through consecutive batch runs, demonstrating good stability.
Article
Green & Sustainable Science & Technology
Pingbo Zhang, Peng Liu, Mingming Fan, Pingping Jiang, Agus Haryono
Summary: Magnetic mesoporous solid acid catalysts, modified by two different methods, exhibited ordered mesoporous structure and excellent paramagnetic properties, leading to high catalytic activity in the transesterification of palm oil with methanol for biodiesel production. Particularly, the catalyst prepared by the grafting method showed excellent reusability with over 80% biodiesel yield after 6 cycles, demonstrating promising industrial application prospects.
Article
Engineering, Environmental
Xi Cheng, Qingge Feng, Dachao Ma, Hongcheng Chen, Xu Zeng, Feifan Xing, Jiayang Teng
Summary: By improving the synthesis process of the catalyst and characterizing the structure of materials, the catalytic activity and stability of CH3-SBA-15-SO3H material in converting glucose to levulinic acid were examined. The results showed that CH3-SBA-15-SO3H exhibited good recyclability and hydrothermal stability, indicating its potential in the development and utilization of biomass resources.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Organic
Tran Quang Hung, Ban Van Phuc, Pham Thi Thanh Loan, Do Thi Lan Nhi, Hien Nguyen, Hoan Xuan Vu, Dang Van Do, Tuan Thanh Dang
Summary: The aim of this study was to explore new applications of non-metal heterogeneous catalysts in the synthesis of 1,4-DHP derivatives. A greener and more efficient method for the synthesis of 1,4-DHPs and asymmetric 1,4-DHP (Felodipine drug) was successfully developed using a heterogeneous SBA-15-SO3H catalyst. The catalyst exhibited efficient activity, stability, and could be recycled at least 5 times without losing catalytic activity.
CURRENT ORGANIC SYNTHESIS
(2023)
Review
Environmental Sciences
Lu Wang, Hanyue Wang, Jianhua Fan, Zhiwu Han
Summary: This article provides a thorough analysis of biodiesel synthesis, covering various aspects such as oil feedstock, synthesis methods, catalysts, and enhancement technologies. It compares different oil feedstocks and synthesis methods, highlighting their respective advantages and disadvantages. Additionally, it provides an overview of emerging intensification technologies and evaluates their benefits and limitations. The contribution of this article lies in offering a comprehensive review of biodiesel production technologies, allowing researchers to assess and compare the latest advancements and contribute to the development of new energy sources.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Physical
Yutong Zhu, Ke Song, Xiaofei Xu, Jian He, Jie Guo
Summary: Utilizing sugar compounds as feedstock for conversion to HMF is sustainable and economically viable. A heterogeneous base catalyst, SBA-15-SO3H, has been created for fructose hydrolysis reactions, showing excellent catalytic performance. The catalyst allows for high fructose conversion rate and HMF yield under mild conditions, fast reaction rate, and simple operation.
Article
Green & Sustainable Science & Technology
Kristine Lazdovica, Valdis Kampars, Anastasija Gaile
Summary: Designing a cost-effective and environmentally friendly heterogeneous catalyst is necessary for biodiesel production. In this study, new catalysts of 0.3-CaO-MgO/SBA-15 and 0.8-CaO-MgO/SBA-15 were prepared and compared. The 0.3-CaO-MgO/SBA-15 catalyst exhibited higher purity, larger surface area, and pore volume, leading to excellent catalytic activity for biodiesel production.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2023)
Article
Chemistry, Physical
G. Dhinagaran, G. Vijayakumar, S. Prashanna Suvaitha, G. Harichandran, K. Venkatachalam
Summary: Conversion of non-edible oils to biodiesel is an important alternative, and the use of SBA-15 supported sulphated zirconia catalyst (SO42-/ZrO2(5,10,15 wt%)/SBA-15) shows promising results in the transesterification of neem oil.
Article
Energy & Fuels
Norshakirah Ahmad Rashidi, Elnida Mustapha, Yeow Yean Theng, Noor Azira Abdul Razak, Najihah Abdul Bar, Khairul Basyar Baharudin, Darfizzi Derawi
Summary: Waste cooking oil is an attractive feedstock for producing advanced biofuels due to its low cost and abundant availability. This study focused on the synthesis and analysis of mesoporous bimetallic catalysts for the catalytic deoxygenation of waste cooking oil. The results showed that the catalyst with 10% Ni-Fe/SBA-15 had the highest liquid yield but low selectivity towards the diesel fraction, while the catalyst with 5% Ni-Co/SBA-15 had the highest selectivity towards the diesel fraction.
Article
Energy & Fuels
Mantian Li, Ping Lu, Changshen Ye, Jie Chen, Ting Qiu
Summary: To address the limitations of mass transfer and poor affinity between catalysts and feedstock oils in the transesterification reaction for biodiesel production, researchers synthesized a series of amphiphilic heteropolyacid-based sulfonic acid-functionalised ionic liquids (AHPA-SFILs). The AHPA-SFILs showed excellent catalytic performance by dissolving in the reaction medium and could be easily recovered. Under optimized conditions, [C16N-PS]-HPMo-1 AHPA-SFILs achieved a high yield of biodiesel, indicating promising application potential.
Article
Chemistry, Physical
Andrea Merenda, Samantha A. Orr, Yang Liu, Blanca Hernandez Garcia, Amin Osatiashtiani, Gabriel Morales, Marta Paniagua, Juan A. Melero, Adam F. Lee, Karen Wilson
Summary: In this study, a dual-catalyst bed configuration was developed to achieve efficient conversion of levulinic acid into gamma-Valerolactone (GVL). By utilizing sulfated zirconia (SZ) and ZrO2/SBA-15 as the Bronsted and Lewis acid catalysts, respectively, high conversion and selectivity were achieved in the esterification and hydrogenation reactions. The dual-bed system showed significantly higher productivity compared to the individual catalysts or their physical mixture.
Article
Chemistry, Multidisciplinary
P. Rajapaksha, R. Orrell-Trigg, D. Shah, S. Cheeseman, K. B. Vu, S. T. Ngo, B. J. Murdoch, N. R. Choudhury, H. Yin, D. Cozzolino, Y. B. Truong, A. F. Lee, V. K. Truong, J. Chapman
Summary: Antimicrobial resistance is a global health challenge, which requires innovative nanomaterials and antimicrobial strategies. In this study, a broad-spectrum antimicrobial nanomaterial combining light-responsive ZnO nanoparticles and reduced graphene oxide was developed for water depollution. The nanocomposite demonstrated strong antimicrobial efficacy against methicillin-resistant Staphylococcus aureus, Escherichia coli, and Salmonella typhimurium bacteria, and also showed potential for photocatalytic degradation of dye.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Physical
Sasha Yang, Binbin Qian, Yuan Wang, Kenji Taira, Qiaoqiao Zhou, Karen Wilson, Adam F. Lee, Lian Zhang
Summary: In this study, the reductive thermal processing of iron oxide catalyst derived from fly ash waste was investigated. The resulting catalyst showed enhanced activity for the ketonization reaction of acetic acid due to the introduction of surface oxygen vacancies and acid-base sites.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Energy & Fuels
Gabriel Morales, Marta Paniagua, Daniel de la Flor, Maria Sanz, Pedro Leo, Clara Lopez-Aguado, Hector Hernando, Samantha A. Orr, Karen Wilson, Adam F. Lee, Juan A. Melero
Summary: Mesoporous silica-supported Zr-MOF-808 catalysts were synthesized and tested for the aldol condensation of furfural and methyl isobutyl ketone to bio-jet fuel precursors. The addition of Zr-MOF-808 nano-crystals to silica scaffolds resulted in well-dispersed Zr species with strong Lewis acidity. The Zr-MOF-808/silica hybrid materials exhibited higher condensation activity compared to unsupported Zr-MOF-808, and the textural properties of the silica support played a significant role in the catalytic performance.
Article
Chemistry, Multidisciplinary
Joao Otavio Mendes, Andrea Merenda, Karen Wilson, Adam Fraser Lee, Enrico Della Gaspera, Joel van Embden
Summary: The growth of (001) oriented antimony chalcogenide thin films can be controlled by tuning the substrate nanostructure, which is crucial for enhancing the performance of these films.
Review
Chemistry, Physical
Hamidreza Arandiyan, Putla Sudarsanam, Suresh K. Bhargava, Adam F. Lee, Karen Wilson
Summary: Biomass is a renewable energy source that is being increasingly utilized due to concerns about climate change caused by fossil fuel consumption. Waste biomass-derived fuels and chemicals offer a solution to reduce reliance on fossil fuels and achieve "Net Zero 2050 CO2 emissions" with environmental, health, and economic benefits. This review focuses on the use of perovskite oxide catalysts for biomass valorization, discussing their structure-reactivity relationships in various reactions. The study highlights the prospects and challenges for the broader application of perovskite oxide catalysts in biomass valorization.
Article
Chemistry, Multidisciplinary
Sabina Siles-Quesada, Christopher M. A. Parlett, Alexander C. Lamb, Jinesh C. Manayil, Yang Liu, Jim Mensah, Hamidreza Arandiyan, Karen Wilson, Adam F. Lee
Summary: Researchers successfully synthesized an ordered macroporous KIT-6 material with 370nm macropores, a face-centered cubic Ia3d structure, and 5nm mesopore channels. After functionalization, this material allows rapid diffusion and esterification of fatty acids. Compared with traditional mesoporous PrSO3H/KIT-6, the esterification rate of fatty acids increased by 5 times, and it also showed a 33% enhancement compared with ordered macroporous PrSO3H/SBA-15.
MATERIALS TODAY CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Varsha Srivastava, Katja Lappalainen, Annu Rusanen, Gabriel Morales, Ulla Lassi
Summary: This review focuses on the catalytic transformation of lignocellulosic biomass into value-added chemicals using MOF-based catalyst/composite materials. The tunability of MOF-based catalysts allows for tailoring their catalytic activity and selectivity through functionalization. The production of HMF and Furfural from lignocellulosic biomass is emphasized due to their versatility as intermediates for various biobased chemicals and fuels. The effects of different experimental parameters on biomass conversion by MOF-based catalysts are also discussed.
Review
Energy & Fuels
Prince J. J. Sagayaraj, Ashil Augustin, Mariyappan Shanmugam, Brahmari Honnappa, Thillai Sivakumar Natarajan, Karen Wilson, Adam F. Lee, Karthikeyan Sekar
Summary: This review discusses the sustainable production of solar fuels through reduction of molecular CO2 using photocatalysts, emphasizing the importance of this approach for controlling global warming. The unique properties of graphene quantum dots (GQD), such as enhanced solar light absorption and high photocatalytic efficiency, are highlighted. Additionally, the challenges and future outlook of GQD-based photocatalytic systems for solar fuels production are presented.
Article
Chemistry, Multidisciplinary
Jiajia Zhao, Yuan Wang, Hamidreza Arandiyan, Anita M. D'Angelo, Aaron Seeber, Daksh Shah, Rachel A. Caruso, Ivan S. Cole, Yunxia Yang, Karen Wilson, Renata Lippi, Adam F. Lee
Summary: We demonstrate how subtle changes in a mixed phase zirconia support induce large changes in catalyst activity and selectivity. Ru/Sn0.2Zr0.8O2 catalyst exhibited similar structrue and metal ion distribution as Ru/ZrO2, but XRD evidence showed new crystalline phases where Sn substituted for Zr. Operando infrared spectroscopy identified linear surface CO* as a catalytic spectator, and Sn0.2Zr0.8O2 promoted CO2 decomposition, favoring a reverse water gas shift pathway.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Engineering, Environmental
S. Jerez, J. San Martin, M. Ventura, M. I. Pariente, Y. Segura, D. Puyol, R. Molina, J. A. Melero, F. Martinez
Summary: Oil refineries produce large amounts of refinery wastewater and oily sludge. Conventional treatments handle these effluents separately without considering resource recovery potential. Thermal hydrolysis of oily sludge at different temperatures and times reduces the solid fraction and releases soluble substrates. These hydrolyzed fractions can be used as substrates for the biological treatment of refinery wastewater.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(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)
