Review
Energy & Fuels
Rida Nayab, Muhammad Imran, Muhammad Ramzan, Muhammad Tariq, Muhammad Babar Taj, Muhammad Nadeem Akhtar, Hafiz M. N. Iqbal
Summary: Biodiesel, as a promising alternative fuel, has been thoroughly reviewed in this paper, covering aspects such as feedstocks, production methods, properties, advantages, disadvantages, economic viability, and future prospects.
Article
Agricultural Engineering
Jong-Min Jung, Minyoung Kim, Sungyup Jung, Young Jae Jeon, Yiu Fai Tsang, Young-Kwon Park, Amit Bhatnagar, Wei-Hsin Chen, Eilhann E. Kwon
Summary: Biodiesel as a carbon-neutral fuel plays a strategic role in CO2 mitigation, but traditional synthesis methods generate a large amount of wastewater and raise ethical concerns with the use of edible oils. Direct conversion of oil-bearing seeds into BD through non-catalytic transesterification, such as Camellia japonica seed, shows higher yield compared to traditional transesterification of edible oils.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Engineering, Environmental
Sungyup Jung, Minyoung Kim, Young Jae Jeon, Yiu Fai Tsang, Amit Bhatnagar, Eilhann E. Kwon
Summary: This study introduced a sustainable method for handling and valorizing AF contaminated food waste, involving non-catalytic transesterification to convert peanuts into biodiesel with high yield.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Energy & Fuels
Arumugam Ramesh, Pamula Balaji Bhargav, Minh-Tri Nguyen-Le
Summary: Magnesium-alumina (Mg-Al2O3) composite was synthesized by sol-gel method and supported with SO42- catalyst using different methods. The catalyst prepared by hydrothermal method showed high acid sites. Sulfidation of catalysts played a significant role in the catalytic conversion of jojoba oil, with SO42-/Mg-Al2O3 (10) catalyst achieving 99% conversion efficiency under optimized conditions.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Kemal Masera, Abul K. Hossain
Summary: The study introduces a new design combining SCR and SNCR systems for low power density diesel engines to reduce NOx emissions. Injection of distilled water and urea-water solution can effectively decrease CO and NO emissions from both fossil diesel and biodiesels.
Article
Thermodynamics
Sungyup Jung, Jong-Min Jung, Kyun Ho Lee, Eilhann E. Kwon
Summary: This study theoretically examined the performance of aviation fuels derived from plant oils through thermally induced non-catalytic transesterification, showing that biodiesels produced had higher consumption rates but higher engine and specific thrusts compared to conventional jet fuels. The study suggests that blending jet fuels with biodiesel can help in reducing CO2 emissions without compromising fuel performance.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Energy & Fuels
Xiang Tan, Heng Zhang, Hu Li, Song Yang
Summary: By optimizing the combination of different material components, a composite catalyst HPW/UiO-66-NH2 with superior performance in esterification reactions was developed, showcasing the synergistic effect of the combined bifunctional acid species. The activation energy for the esterification reaction was determined to be 31.0 kJ/mol, and the bifunctional composite catalyst exhibited stability and high reusability during consecutive recycles.
Article
Thermodynamics
Sungyup Jung, Jong-Min Jung, Yiu Fai Tsang, Amit Bhatnagar, Wei-Hsin Chen, Kun-Yi Andrew Lin, Eilhann E. Kwon
Summary: This study explores a novel method of directly converting food waste into biodiesel using black soldier fly larvae, with efficient biodiesel production achieved under non-catalytic conditions. The biodiesel derived from black soldier fly larvae meets the fuel standards of Korea and EU, demonstrating its potential as a sustainable alternative fuel source.
Article
Engineering, Environmental
Dong-Jun Lee, Minyoung Kim, Sungyup Jung, Young-Kwon Park, YuNa Jang, Yiu Fai Tsang, Hana Kim, Kyu-Hyun Park, Eilhann E. Kwon
Summary: A sustainable valorization platform for organic waste has yet to be fully developed. This study focuses on a new valorization route that converts food/agricultural waste to biodiesel using yellow mealworm larvae. The non-catalytic conversion process shows high tolerance against water and impurities, making it a promising method for biodiesel production.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Pantea Moradi, Majid Saidi, Ali Taheri Najafabadi
Summary: This study evaluated the efficiency of producing biodiesel from biomass containing free fatty acids using the electrolysis method, investigating the impact of various operating parameters on the yield. The results showed that electrolysis could achieve a high biodiesel production yield under specific conditions.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Review
Green & Sustainable Science & Technology
Pedro Andreo-Martinez, Victor Manuel Ortiz-Martinez, Maria Jose Salar-Garcia, Jose Manuel Veiga-del-Bano, Antonio Chica, Joaquin Quesada-Medina
Summary: Global warming and fossil fuel depletion have led to the search for alternative and renewable fuels. Biodiesel produced from waste animal fats has gained attention as a low-cost and environmentally friendly option. Supercritical processes offer advantages over conventional catalytic transesterification for biodiesel production. This study provides a systematic review of the non-catalytic supercritical production of biodiesel using animal fats as a feedstock.
ENERGY FOR SUSTAINABLE DEVELOPMENT
(2022)
Article
Agricultural Engineering
Heng Zhang, Li-Long Zhang, Xiang Tan, Hu Li, Song Yang
Summary: This study successfully prepared biodiesel using two magnetic catalysts, Fe3O4@SiO2-SO3H (P) and Fe3O4@SiO2-SO3H (S), with Fe3O4@SiO2-SO3H (S) showing higher yield and good reusability. Kinetic study demonstrated its excellent catalytic performance with a low activation energy, indicating great potential for industrial application.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Chemistry, Multidisciplinary
Karoline de Sousa Castro, Luis Fernando de Medeiros Costa, Valter Jose Fernandes, Regineide de Oliveira Lima, Aruzza Mabel de Morais Araujo, Mikele Candida Sousa de Sant'Anna, Nataly Albuquerque dos Santos, Amanda Duarte Gondim
Summary: The study demonstrates the high efficiency and selectivity of Ni/Al-MCM-41 catalyst in catalytic pyrolysis of palm oil, showing the potential for renewable hydrocarbon production.
Article
Energy & Fuels
Bisheswar Karmakar, Samuel Lathazuala Rokhum, Gopinath Halder
Summary: This study comparatively evaluated the synthesis of biodiesel from rubber seed oil using superheated methanol and 2-propanol. The results showed that methanol converted the oil faster than 2-propanol, but propyl esters had higher thermal stability. The optimal operating conditions were determined as reaction temperatures of 240 degrees C and 260 degrees C for 7 minutes and 8 minutes, respectively.
Article
Chemistry, Physical
Surya Kanth, Sumita Debbarma
Summary: Hydrogen enrichment improves combustion and increases thermal efficiency, while reducing fuel consumption and emissions. Rice bran oil performs better than karanja biodiesel in terms of performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Environmental Sciences
Nur Syahidah Afandi, Maedeh Mohammadi, Satoshi Ichikawa, Abdul Rahman Mohamed
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2020)
Article
Energy & Fuels
Pooya Lahijani, Maedeh Mohammadi, Abdul Rahman Mohamed
Summary: This study investigates the co-gasification of tire char and rambutan peel. The results show that high proportion of tire char inhibits the gasification reaction, while higher content of biomass promotes the reaction. In addition, natural catalysts in the biomass also have a synergistic effect on the reaction.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Environmental Sciences
Nor Fazila Khairudin, Maedeh Mohammadi, Abdul Rahman Mohamed
Summary: This study focused on developing alumina-supported cobalt (Co/Al2O3) catalysts for dry reforming of methane (DRM) with high catalytic activity and long-term stability, attributed to the small Co particle size with good dispersion on the alumina support and strong metal-support interaction.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
S. Anthonysamy, P. Lahijani, M. Mohammadi, A. R. Mohamed
Summary: This study investigated the low-temperature oxidative uptake of NO on alkali-modified biochar, showing that the NO capture capacity was significantly improved after modification. The adsorption capacity of KOH-activated biochar reached 87.0 mg/g at 30 degrees C, mainly attributed to factors like oxygen functionalities and carbon defects.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Maher T. Alshamkhani, Pooya Lahijani, Keat Teong Lee, Abdul Rahman Mohamed
Summary: In this study, the switching voltage technique was used to efficiently exfoliate graphite in eutectic molten salts. The exfoliated graphene samples exhibited high production yields, low ID/IG ratios, and good electrical conductivities. Compared to constant voltage exfoliation, the switching voltage technique produced smoother graphene flakes with less agglomeration, crumbling, and wrinkling. Characterization analysis confirmed the smaller crystallite size, lower thickness, and higher quality and purity of the exfoliated graphene prepared using the switching voltage technique.
CERAMICS INTERNATIONAL
(2022)
Article
Environmental Sciences
Norhusna Mohamad Nor, Lau Lee Chung, Abdul Rahman Mohamed
Summary: The utilization of microwave heating and nitrogen-modification can generate adsorbents with superior performance for efficient removal of hydrogen sulfide (H2S). The modified palm shell activated carbon synthesized using microwave heating exhibited excellent properties, including a large surface area and new pore structures. Microwave heating assisted in the development of the adsorbent's properties and contributed to high removal of H2S at low adsorption temperature.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Energy & Fuels
Nuradibah Mohd Amer, Pooya Lahijani, Maedeh Mohammadi, Abdul Rahman Mohamed
Summary: This article reviews the recent studies on biochar as a material for carbon capture, including its preparation and modification methods, and the influence on its physical, chemical, and physicochemical properties. Biochar exhibits high CO2 adsorption performance and sustainable performance, which are crucial for large-scale CO2 capture.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Review
Chemistry, Physical
Lutfi Kurnianditia Putri, Boon-Junn Ng, Wee-Jun Ong, Siang-Piao Chai, Abdul Rahman Mohamed
Summary: This article reviews the potential, design strategies, and material progress of photoelectrochemical CO2 reduction reaction (PEC CO2RR), as well as summarizes and discusses various photocathode semiconductor materials. Finally, perspectives on the design of photocathodes for CO2RR and new paradigms in the field are proposed.
ADVANCED ENERGY MATERIALS
(2022)
Article
Energy & Fuels
Anis Natasha Shafawi, Pooya Lahijani, Maedeh Mohammadi, Abdul Rahman Mohamed
Summary: Sequential ultrasonication and metal modification can enhance the CO2 capture capacity of biochar, but no synergistic effect was observed when they were applied together. Ultrasonication and metal modification can modulate the physicochemical properties of biochar, affecting its CO2 capture performance. The Avrami kinetic model can better predict the CO2 adsorption on biochar.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Review
Chemistry, Inorganic & Nuclear
Bashaer Mahmoud Namoos, Abdul Rahman Mohamed, Khozema Ahmed Ali
Summary: The desire to improve photocatalytic activity is increasing, especially in semiconductors. Porous photocatalysts have been synthesized to improve surface area and reduce recombination of electron-hole pairs. This paper reviews recent works on porous photocatalysts, with a focus on synthesis and fabrication methods. The topotactic transition technique is the best method for metal oxide porous photocatalysts, while self-organizing blocks are the best method for polymeric porous photocatalysts, especially for growing and fixing 1D semiconductor nanomaterials on 3D and 2D semiconductors on 2D. The hard template method allows for better control of particle shape and size, but the template removal is non-ecofriendly, making the soft template method more favorable. The etching method, on the other hand, is suitable for fabricating porous photocatalysts through a membrane by utilizing the electrical charge created by moving electrons in the electrolyte as a driving force.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Review
Engineering, Environmental
Michelle Mei Xue Lum, Kim Hoong Ng, Sin Yuan Lai, Abdul Rahman Mohamed, Abdulkareem Ghassan Alsultan, Yun Hin Taufiq-Yap, Mei Kee Koh, Mohamad Azuwa Mohamed, Dai-Viet N. Vo, Manjulla Subramaniam, Kyle Sebastian Mulya, Nathasya Imanuella
Summary: Air pollution from untreated sulfur dioxide-rich flue gas is a major environmental and human health issue. Many sulfur dioxide removal technologies have been developed, but conventional methods generate by-products. Catalytic reduction of sulfur dioxide offers a sustainable solution with high efficiency and the recovery of valuable solid sulfur. This review discusses recent advances and the potential of this technology.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Review
Chemistry, Multidisciplinary
Xin-Quan Tan, Wuwei Mo, Xinlong Lin, Jian Yiing Loh, Abdul Rahman Mohamed, Wee-Jun Ong
Summary: The electro/photocatalytic CO2 reduction reaction (CO2RR) is an important approach for the synthesis of renewable fuels and value-added chemicals. MXenes, a type of 2D transition metal carbides, nitrides, and carbonitrides, show great potential in electrocatalysis and photocatalysis due to their unique properties. This review provides an overview of recent advances in MXene-based catalysts for the electrocatalytic and photocatalytic CO2RR, including their structure, synthesis pathways, and activity enhancement strategies. The review also discusses the current state of research in the field and proposes future perspectives.
Article
Engineering, Environmental
Maher T. Alshamkhani, Lutfi Kurnianditia Putri, Pooya Lahijani, Keat Teong Lee, Abdul Rahman Mohamed
Summary: In this study, an electrochemically exfoliated graphene/graphite carbon nitride ((EG)/g-C3N4) heterojunction photocatalyst was synthesized for CO2 photoreduction to methane. The best-performing photocatalyst (0.075 EG-CN) showed a significant enhancement in CH4 production with 98.6% selectivity after 6 hours of light irradiation compared to pure CN. The developed photocatalyst exhibited high stability after consecutive cycles of CO2 photoreduction to CH4.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Chemistry, Physical
Xin-Quan Tan, Sue-Faye Ng, Abdul Rahman Mohamed, Wee-Jun Ong
Summary: This article introduces the recent advances in experimental and computational studies on the interfacial design of 0D nanostructures on 2D graphitic carbon nitride (g-C3N4). By engineering point-to-face contact between 2D g-C3N4 and 0D nanomaterials, heterojunction interfaces can be formed, which is beneficial for photocatalytic reactions. Different types of 0D nanostructures and synthesis strategies for photocatalytic applications are discussed.
Article
Chemistry, Physical
Jie-Yinn Tang, Chen-Chen Er, Lling-Lling Tan, Yi-Hao Chew, Abdul Rahman Mohamed, Siang-Piao Chai
Summary: This study systematically unraveled the effect of defect engineering on the properties and catalytic performance of graphitic carbon nitride (g-C3N4). By introducing various defect sites, the study achieved improved charge separation efficiency and CO2 adsorption affinity in g-C3N, providing a more feasible pathway for CO2 reduction.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Agricultural Engineering
G. Grasa, I. Martinez, R. Murillo
Summary: Gasification kinetics of six chars from residual origin were studied under relatively low temperature, low CO2, and high H2O partial pressures. The Random Pore Model (RPM) showed the best fit to experimental results, but the selection of the reaction model depended on the ash composition, specifically the presence of alkali and alkaline earth metals. Chars with ash content higher than 30% wt. were modeled with the RPM model, while chars with the highest K/Si ratio required modified versions of the RPM to accurately predict reaction rates. Textural properties played a key role in determining reaction parameters, such as the pre-exponential factor and activation energy, for chars with similar ash content and composition.
BIOMASS & BIOENERGY
(2024)
Review
Agricultural Engineering
V. Godvin Sharmila, Surya Prakash Shanmugavel, J. Rajesh Banu
Summary: Proper treatment and disposal of biomass waste is crucial to prevent environmental deposition and its negative impacts. Biofuel has emerged as a potential alternative to fossil fuels, reducing carbon emissions and meeting global energy demands. This review examines different biomass waste conversion techniques and explores the production of biofuels with zero carbon emissions. Research on anaerobic treatment, metabolic engineering, and artificial intelligence has been conducted to enhance biofuel production efficiency.
BIOMASS & BIOENERGY
(2024)
Review
Agricultural Engineering
Selvakumar Periyasamy, Adane Asefa Adego, P. Senthil Kumar, G. G. Desta, T. Zelalem, V. Karthik, J. Beula Isabel, Mani Jayakumar, Venkatesa Prabhu Sundramurthy, Gayathri Rangasamy
Summary: Valorizing agricultural waste into valuable products is crucial for environmental protection and bioeconomy advancement. Preprocessing of agricultural waste is a critical step to convert free carbohydrate molecules for final conversion, and factors such as biomass nature, feed loading, pH, temperature, and time influence the process. This review provides comprehensive information on agricultural waste availability, preprocessing techniques, and factors influencing performance.
BIOMASS & BIOENERGY
(2024)
Article
Agricultural Engineering
Aqueel Ahmad, Ashok Kumar Yadav, Achhaibar Singh, Dinesh Kumar Singh
Summary: The study focuses on predicting and optimizing the yield of biogas production in an anaerobic digester using co-digestion. Experimental data was used to develop a machine learning-based prognostic model, and the Response Surface Methodology (RSM) was employed to optimize the parameters. The results demonstrate that RSM coupled with machine learning is an effective technique for modeling, predicting, and optimizing biogas production yield.
BIOMASS & BIOENERGY
(2024)
Article
Agricultural Engineering
Yijing Zhong, Wenxiang Zhai, Xinli Wei
Summary: This paper studies the thermal stability and decomposition of cork materials with and without silica aerogel filler. The results show that the decomposition is inhibited and the pyrolysis is significantly reduced with the addition of silica aerogel. This finding suggests that silica aerogel-infused cork may be a promising raw material for biofuel production with reduced environmental pollution.
BIOMASS & BIOENERGY
(2024)
