Article
Agricultural Engineering
Ramon S. B. Ferreira, Isabel J. Bejarano-Alva, Gustavo G. Shimamoto, Matthieu Tubino, Antonio J. A. Meirelles, Eduardo A. C. Batista
Summary: This study investigated the performance of Purolite A503S anion exchange resin as a heterogeneous catalyst in the production of ethyl biodiesel from palm olein. Optimization of independent variables using response surface methodology and factorial design resulted in a conversion rate of approximately 98.10% under optimized conditions, showcasing the potential of Purolite A503S resin as a catalyst in transesterification reactions.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Energy & Fuels
Elijah Olawale Ajala, Mary Adejoke Ajala, Temitope Elizabeth Odetoye, Fatai Alade Aderibigbe, Hammed Olalekan Osanyinpeju, Mufutau Ayanniyi Ayanshola
Summary: Synthesis of heterogeneous chicken eggshell catalysts at different temperatures was studied for palm kernel biodiesel production. The CEC900 catalyst showed the highest chemical composition, surface area, and optimal parameters for producing biodiesel. The catalytic activity decreased slightly after repeated usage, suggesting CEC is a cost-effective catalyst option.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Energy & Fuels
Warisara Woranuch, Kanokwan Ngaosuwan, Worapon Kiatkittipong, Doonyapong Wongsawaeng, Weerinda Appamana, Jon Powell, Samuel Lalthazuala Rokhum, Suttichai Assabumrungrat
Summary: In recent years, attention has been focused on the use of heterogeneous catalysts, with CaO powder being considered a promising catalyst for biodiesel production. Through investigation of catalyst pellet fabrication parameters, it was found that using an Al2O3 binder resulted in higher catalytic activity compared to kaolin and diatomite supported catalysts. The CaO to Al2O3 mass ratio significantly affected surface area and total basicity, with the CaO-A(800)-3.5:1 catalyst showing the highest biodiesel yield due to the presence of multiple active crystal phases.
Review
Agricultural Engineering
Mani Jayakumar, Natchimuthu Karmegam, Marttin Paulraj Gundupalli, Kaleab Bizuneh Gebeyehu, Belete Tessema Asfaw, Soon Woong Chang, Balasubramani Ravindran, Mukesh Kumar Awasthi
Summary: Recent research has shown that heterogeneous catalysts are preferred in biodiesel production, with animal shells and bones being suitable biowastes for synthesizing environmentally friendly and cost-effective catalysts.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Digambar Singh, Dilip Sharma, Pushpendra Kumar Sharma, Amit Jhalani, Dinesh Kumar Sharma
Summary: This study optimized the transesterification reaction parameters of palm fatty acids to methyl esters using homogenous sulfuric acid as a catalyst. The optimal results were obtained at a catalyst concentration of 6% (w/w), reaction temperature of 70 degrees C, reaction time of 120 min, and alcohol to oil molar ratio of 30:1, resulting in a yield of 95.35%, viscosity of 5.0 cSt, and density of 880 kg/m(3) for palm biodiesel.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Green & Sustainable Science & Technology
Haris Mahmood Khan, Tanveer Iqbal, Saima Yasin, Muhammad Irfan, Muhammad Mujtaba Abbas, Ibham Veza, Manzoore Elahi M. Soudagar, Anas Abdelrahman, Md Abul Kalam
Summary: Biodiesel is recognized as a renewable, sustainable, and eco-friendly alternative to traditional diesel. The use of heterogeneous catalysts and cosolvents in biodiesel production can improve yield and efficiency.
Article
Environmental Sciences
Arson Edberg anak Erison, Yie Hua Tan, N. M. Mubarak, Jibrail Kansedo, Mohammad Khalid, Mohammad Omar Abdullah, Mostafa Ghasemi
Summary: Biodiesel, as a renewable and environmentally friendly option, faces current issues that hinder its development, with the utilization of impregnated magnetic biochar derived from waste PKS catalyst showing potential to reduce environmental impacts. Further research on life cycle cost and sensitivity analysis is needed to promote sustainable biodiesel production.
ENVIRONMENTAL RESEARCH
(2022)
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)
Article
Environmental Sciences
Nur Azreena Idris, Harrison Lik Nang Lau, Nur Sulihatimarsyila Abd Wafti, Nabilah Kamaliah Mustaffa, Soh Kheang Loh
Summary: In this study, palm fatty acid distillate (PFAD) was used as a feedstock for biodiesel production. Glycerolysis reaction was conducted at temperatures ranging from 160 to 200 degrees C using a natural CaO catalyst derived from raw chicken eggshell. The results showed that the use of activated eggshell as catalyst effectively reduced free fatty acid (FFA) levels to a suitable range for biodiesel production.
WASTE AND BIOMASS VALORIZATION
(2021)
Article
Chemistry, Applied
Soek Sin Teh, Harrison Lik Nang Lau
Summary: The quality assessment of refined red palm-pressed mesocarp olein (PPMO) showed that it has comparable physicochemical properties and oxidative stability with commercial cooking oil, palm olein (PO). Analyses on food safety parameters and contaminants proved that refined PPMO is safe to be consumed and it contains remarkably greater concentrations of phytonutrients. This indicates that refined PPMO is suitable for human consumption and may have protective health benefits.
Review
Engineering, Chemical
Fatai A. Aderibigbe, Suleiman Shiru, H. B. Saka, M. K. Amosa, Sherif Ishola Mustapha, Mohammed Alhassan, Ayoade L. Adejumo, Morufudeen Abdulraheem, R. U. Owolabi
Summary: The demand for cleaner fuels has led to the exploration of alternative technologies such as renewable fuels. Research into second generation biofuel feedstocks holds promise for the future of cleaner energy solutions.
CHEMBIOENG REVIEWS
(2021)
Article
Acoustics
Harsh B. Jadhav, Parag R. Gogate, Jyotsna T. Waghmare, Uday S. Annapure
Summary: The study focused on intensified synthesis of designer lipids using ultrasound, optimizing reaction conditions to achieve high yield and stability. Results demonstrated that the synthesized designer lipids exhibited prolonged oxidative stability and attractive color, showcasing the potential benefits of the eco-friendly technique.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Green & Sustainable Science & Technology
Bidangshri Basumatary, Sanjay Basumatary, Bipul Das, Biswajit Nath, Pranjal Kalita
Summary: This study focused on the development of a solid base catalyst using waste parts of the banana plant for efficient biodiesel production. The catalyst derived from the banana trunk showed the highest efficacy in catalyzing the transesterification reaction of jatropha oil. Comprehensive characterization of the catalysts demonstrated their potential for large-scale biodiesel production with high efficiency.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Green & Sustainable Science & Technology
Gabriela E. Mijangos, Cristina Cuautli, Issis C. Romero-Ibarra, Jorge Vazquez-Arenas, Carlos E. Santolalla-Vargas, Victor Santes, Adrian A. Castaneda-Galvan, Heriberto Pfeiffer
Summary: This study analyzes the influence of sodium and lithium content in the metasilicate crystal structure on the heterogeneous transesterification reaction for biodiesel production. The results show that sodium metasilicate possesses better stability and reutilization capacity compared to lithium metasilicate. DFT calculations reveal significant differences between these two catalysts.
Article
Energy & Fuels
J. L. Aleman-Ramirez, Joel Moreira, S. Torres-Arellano, Adriana Longoria, Patrick U. Okoye, P. J. Sebastian
Summary: This study demonstrates the development of a sustainable biodiesel production catalyst from moringa leaves, with inorganic carbonate minerals promoting transesterification. The synthesized biodiesel meets commercial specifications, and the catalyst shows potential for reuse in multiple cycles.
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)