Article
Energy & Fuels
Haris Mahmood Khan, Tanveer Iqbal, M. A. Mujtaba, Manzoore Elahi M. Soudagar, Ibham Veza, I. M. Rizwanul Fattah
Summary: Biodiesel, a promising renewable fuel, has gained global attention for replacing fossil fuels using heterogeneous catalysts to accelerate reactions. Research shows that utilizing microwave technology in heterogeneously catalysed transesterification greatly reduces reaction times while maintaining or improving catalytic activity.
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
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
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
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.
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
Agricultural Engineering
Bahar Ghasemzadeh, Amir Abbas Matin, Biuck Habibi, Mostafa Ebadi
Summary: This research aims to design and prepare a new magnetically recoverable catalyst based on agrowastes, specifically cotton waste, for the production of biodiesel. The proposed core-shell nanocomposite catalyst showed excellent performance in catalyzing transesterification reaction and achieved optimal results under certain conditions.
INDUSTRIAL CROPS AND PRODUCTS
(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
Green & Sustainable Science & Technology
Zayed Al-Hamamre, Arwa Sandouqa, Basel Al-Saida, Reyad A. Shawabkeh, Mohammad Alnaief
Summary: A solid heterogeneous catalyst was prepared by impregnation of oil shale ash with KNO3 and subsequent calcination. The effects of different preparation conditions on waste cooking oil to biodiesel conversion were investigated. The characterization of the catalyst and the quantification of the produced biodiesel were performed using various analytical techniques.
Article
Acoustics
Pamella A. Oliveira, Raphaela M. Baesso, Gabriel C. Morais, Andre Alvarenga, Rodrigo P. B. Costa-Felix
Summary: This study investigated the use of high frequency, low power ultrasound in biodiesel production, eliminating the need for external heating sources and mechanical stirring. Results showed that increasing ultrasound power and frequency can enhance biodiesel conversion rates. Moreover, ultrasound was found to have lower energy consumption compared to conventional methods, indicating its potential as a promising technology for biodiesel production.
ULTRASONICS SONOCHEMISTRY
(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
Green & Sustainable Science & Technology
Shaokang Qu, Chao Chen, Mengli Guo, Weiqiang Jiang, Jie Lu, Weiming Yi, Jincheng Ding
Summary: In this study, a PEG/MgO/ZSM-5@Fe3O4 magnetic catalyst was successfully synthesized and applied to the microwave-assisted in-situ transesterification of Spirulina platensis with ethanol. The catalyst showed high efficiency with a biodiesel yield of up to 95.8%. Furthermore, the catalyst demonstrated good recyclability without loss of active components and the produced biodiesel met relevant standards.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Energy & Fuels
Matheus Arrais Goncalves, Erica Karine Lourenco Mares, Jose Roberto Zamian, Geraldo Narciso da Rocha Filho, Leyvison Rafael Vieira da Conceicao
Summary: In this study, a heterogeneous magnetic acid catalyst MoO3/SrFe2O4 was synthesized and applied in transesterification of waste cooking oil, providing an environmentally friendly approach to biodiesel production. By developing a mathematical model and optimizing reaction conditions, a high ester conversion rate of 95.4% was achieved with excellent catalyst reusability and stability demonstrated through five runs.
Article
Energy & Fuels
Sanjay Basumatary, Biswajit Nath, Bipul Das, Pranjal Kalita, Bidangshri Basumatary
Summary: This study examines the use of a green catalyst derived from Heteropanax fragrans in the production of Jatropha curcas biodiesel. The catalyst exhibited high basicity and reusability, resulting in efficient catalytic performance under optimal conditions. The findings suggest that this catalyst is a promising option for biodiesel production with significant implications for reducing overall costs.
Article
Energy & Fuels
Olayomi Abiodun Falowo, Eriola Betiku
Summary: This study developed a new green heterogeneous alkali catalyst from cocoa, kola nut, and fluted pumpkin wastes for transesterification of yellow oleander-rubber seed oil blend. By optimizing catalyst concentration, temperature, and time, high yields of biodiesel were achieved, demonstrating the potential for sustainable and economic biodiesel production using agricultural waste materials.
Article
Environmental Sciences
Billie Yan Zhang Hiew, Lai Yee Lee, Xin Jiat Lee, Suchithra Thangalazhy-Gopakumar, Suyin Gan
Summary: This study successfully removed Cd(2+) from water systems using OW biosorbent, which exhibited diverse functional groups and surface structures. The biosorption process followed Langmuir and Elovich models, with potential mechanisms including ionic exchange, hydrogen bonding, and electrostatic interactions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Energy & Fuels
Mustapha Danladi Ibrahim, Yousif Abdalla Abakr, Suyin Gan, Lai Yee Lee, Suchithra Thangalazhy-Gopakumar
Summary: This study investigated the effects of inert gases on intermediate pyrolysis and product properties from Bambara Groundnut Shells. The results showed that the inert gases did not significantly affect the yields of bio-oil, biochar, and syngas. The presence of N-2/CO2 gas favored alcohol and phenol production significantly.
Article
Thermodynamics
Mohammad Zandie, Hoon Kiat Ng, Suyin Gan, Mohd Farid Muhamad Said, Xinwei Cheng
Summary: In this research, a MIMO-ANN is developed to model the characteristics of diesel-biodiesel-gasoline mixtures and predict engine performance and stability, emissions, combustion and ignition characteristics. By performing sensitivity analysis and outlier detection on the less-effective inputs/data points, accurate predictions are obtained.
Article
Thermodynamics
Mohammad Zandie, Hoon Kiat Ng, Suyin Gan, Mohd Farid Muhamad Said, Xinwei Cheng
Summary: This research analyzes the combustion, soot formation, and exhaust emissions of diesel, biodiesel, gasoline fuels, and their mixtures in a constant volume chamber. The study focuses on the effects of different ambient temperature and oxygen levels on flame structure and emissions. The results show that the mixture D65 | BD20 | G15 has lower soot formation and nitrogen oxide emissions. Lowering the ambient temperature and increasing the oxygen concentration further reduce the emissions.
Article
Environmental Sciences
Mustapha Danladi Ibrahim, Yousif Abdalla Abakr, Suyin Gan, Suchithra Thangalazhy-Gopakumar
Summary: The current work focused on the intermediate pyrolysis of Bambara Groundnut Shells (BGS-G1), Sweet Sorghum Stalk (SSS), and Shea Nutshells (SNS). These feedstocks showed potential for bioenergy and green chemicals production.
ENVIRONMENTAL TECHNOLOGY
(2022)
Review
Green & Sustainable Science & Technology
Mohammad Zandie, Hoon Kiat Ng, Suyin Gan, Mohd Farid Muhamad Said, Xinwei Cheng
Summary: The article thoroughly reviews the feasibility of using a ternary fuel blend of diesel-biodiesel-gasoline in engines, highlighting the benefits and challenges associated with adding gasoline to the mixture.
Article
Thermodynamics
Edwin Jia Chiet Choo, Xinwei Cheng, Gianfranco Scribano, Hoon Kiat Ng, Suyin Gan
Summary: This study numerically investigates the soot characteristics of pure n-dodecane and its blends with n-butanol at different blending ratios and ambient temperatures. The results show that increasing the n-butanol blending ratio and decreasing the ambient temperature lead to a decrease in soot volume fraction and soot particle size. The findings suggest that both soot formation and oxidation mechanisms are suppressed at higher n-butanol blending ratio and lower ambient temperature, with the formation mechanism having a more dominant role.
Article
Engineering, Chemical
Wan Ting Tee, Nicholas Yung Li Loh, Billie Yan Zhang Hiew, Wee Siong Chiu, Poi Sim Khiew, Suchithra Thangalazhy-Gopakumar, Suyin Gan, Lai Yee Lee
Summary: A new 3D-CTG system was developed using an ecofriendly ice-segregation method to remove malachite green (MG) and crystal violet (CV) dyes from polluted water. The system showed the formation of lamellar porous networks and abundant chemical functional groups. The optimized parameters achieved high removal rates for both CV and MG dyes, and the saturated 3D-CTG adsorbent showed recyclability with decent re-generation efficiencies.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Thermodynamics
Mohammad Zandie, Hoon Kiat Ng, Mohd Farid Muhamad Said, Xinwei Cheng, Suyin Gan
Summary: CFD simulations were conducted to study the effects of fuel blending ratio, exhaust gas recirculation (EGR), and start of injection (SOI) on the combustion, emissions, engine output, and fuel efficiency of a compression ignition engine. The results showed that the D65|BD20|G15 mixture achieved the lowest nitrogen oxides (NOx) and soot emissions, while the D75|BD20|G5 mixture had the lowest carbon monoxide (CO) and unburnt hydrocarbons (UHCs) emissions. The application of 20% EGR reduced NOx and soot, but increased UHCs and CO emissions. Advancing the SOI timing decreased CO and UHCs emissions. A multi-parameter optimization was performed to determine the best operating condition.
Article
Environmental Sciences
Wan Ting Tee, Nicholas Yung Li Loh, Billie Yan Zhang Hiew, Pau Loke Show, Svenja Hanson, Suyin Gan, Lai Yee Lee
Summary: Three-dimensional heteroatom-doped graphene is an effective approach for treating pharmaceutical wastewater due to its excellent adsorption and physicochemical properties. A boron-doped graphene oxide composite was successfully synthesized and showed promising adsorption performance for removing amitriptyline from contaminated water.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Analytical
Wan Ting Tee, Jasmine Chua, Jia En Yong, Billie Yan Zhang Hiew, Suyin Gan, Lai Yee Lee
Summary: This study focuses on synthesizing a novel graphene-based adsorbent to remediate Amitriptyline residue in the aquatic ecosystem. The as-synthesized adsorbent showed high adsorption performance and potential large-scale application, making it an effective system for removing Amitriptyline in water.
Article
Engineering, Environmental
Kar Chiew Lai, Billie Yan Zhang Hiew, Wan Ting Tee, Suchithra Thangalazhy-Gopakumar, Suyin Gan, Lai Yee Lee
Summary: A new macro-hierarchical graphene oxide configuration was developed for cadmium decontamination, showing good adsorption performance in both batch and continuous aqueous adsorption systems. The study demonstrated the potential for efficient removal of cadmium in water environment using the fabricated GO/XG/TI as an adsorbent.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Seyedeh Pegah Jalilian Ahmadkalaei, Suyin Gan, Hoon Kiat Ng, Suhaimi Abdul Talib
Summary: This study investigated the role of humic acid in Fenton reaction for the degradation of diesel in soil, finding that the impact varies depending on the molecular weight of the contaminants. Increasing humic acid dosage enhances the positive effects on total TPH degradation, with an optimal dosage of 150 mg/l. Removal efficiencies at higher pH levels depend on the molecular weight of TPH contaminants.
ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY
(2021)
Article
Thermodynamics
Hai Zhao, Puzhen Gao, Xiaochang Li, Ruifeng Tian, Hongyang Wei, Sichao Tan
Summary: This study numerically investigates the interaction between flow-induced vibration and forced convection heat transfer in a tube bundle. The results show that the impact of flow-induced vibration on heat transfer varies in different flow velocity regions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rohit Chintala, Jon Winkler, Sugirdhalakshmi Ramaraj, Xin Jin
Summary: The current state of fault detection and diagnosis for residential air-conditioning systems is expensive and not suitable for widespread implementation. This paper proposes a cost-effective solution by introducing an automated fault detection algorithm as a screening step before more expensive tests can be conducted. The algorithm uses home thermostats and local weather information to identify thermodynamic parameters and detect high-impact air-conditioning faults.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
A. Azimi, N. Basiri, M. Eslami
Summary: This paper presents a novel optimization algorithm for improving the water-film cooling system of photovoltaic panels, resulting in a significant increase in net energy generation.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Duc-Thuan Phung, Chin-Hsiang Cheng
Summary: In this study, a novel CFDMD model is used to analyze and investigate the behavior of thermal-lag engines (TLE). The study shows that the CFDMD model effectively captures the thermodynamic behavior of the working gas and the dynamic behavior of the engine mechanism. Additionally, the study explores the temporal evolution of engine speed and the influence of various parameters on shaft power and brake thermal efficiency. The research also reveals the existence of a thermal-lag phenomenon in TLE.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Haiying Yang, Yinjie Shen, Lin Li, Yichen Pan, Ping Yang
Summary: The purpose of this article is to find a measure to improve the interfacial thermal transfer of graphene/silicon heterojunction. Through molecular dynamics simulation, it is found that surface modification can significantly reduce the thermal resistance, thereby improving the thermal conductivity of the graphene/silicon interface.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Qiong Wu, Yancheng Wang, Haonan Zhou, Xingye Qiu, Deqing Mei
Summary: This article introduces a visible methanol steam reforming microreactor, which uses an optical crystal as an observation window and measures the reaction temperature in real-time using infrared thermography. The results show that under lower oxygen to carbon ratio conditions, the microreactor has a higher heating rate and a stable gradient in temperature distribution.
APPLIED THERMAL ENGINEERING
(2024)
Review
Thermodynamics
Giulia Manco, Umberto Tesio, Elisa Guelpa, Vittorio Verda
Summary: In the past decade, there has been a growing interest in studying energy systems for the combined management of power vectors. Most of the published works focus on finding the optimal design and operations of Multi Energy Systems (MES). However, for newcomers to this field, understanding how to achieve the desired optimization details while controlling computational expenses can be challenging and time-consuming. This paper presents a novel approach to analyzing the existing literature on MES, with the aim of guiding practical development of MES optimization. Through the discussion of six case studies, the authors provide a mathematical formulation as a reference for building the model and emphasize the impact of different aspects on the problem nature and solver selection. In addition, the paper also discusses the different approaches used in the literature for incorporating thermal networks and storage in the optimization of multi-energy systems.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xuepeng Yuan, Caiman Yan, Yunxian Huang, Yong Tang, Shiwei Zhang, Gong Chen
Summary: In this study, a multi-scale microgroove wick (MSMGW) was developed by laser irradiation, which demonstrated superior capillary performance. The surface morphology and performance of the wick were affected by laser scan pitch, laser power, repetition frequency, and scanning speed. The MSMGW showed optimal capillary performance in alumina material and DI water as the working fluid.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Maofei Mei, Feng Hu, Chong Han
Summary: This paper proposes an effective local search method based on detection of droplet boundaries for understanding the dynamic process of droplet growth during dropwise condensation. The method is validated by comparing with experimental data. The present simulation provides an effective approach to more accurately predict the nucleation site density in future studies.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rahul Kumar Sharma, Ashish Kumar, Dibakar Rakshit
Summary: The study explores the use of phase change materials (PCM) as a retrofit with Heating Ventilation and Air-conditioning systems (HVAC) to reduce energy consumption and improve air quality. By incorporating PCM with specific thickness and fin configurations, significant energy savings can be achieved in comparison to standard HVAC systems utilizing R134a. This research provides policymakers with energy-efficient and sustainable solutions for HVAC systems to combat climate change.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Zhenhua Ren, Xiangjin Meng, Xingang Qi, Hui Jin, Yunan Chen, Bin Chen, Liejin Guo
Summary: This paper investigates the heat transfer mechanism and factors influencing thermal radiation in the process of supercritical water gasification (SCWG) of coal, and proposes a comprehensive numerical model to simulate the process. Experimental validation results show that thermal radiation accounts for a significant proportion of the total heat exchange in the reactor and a large amount of radiant energy exists in the important spectral range of supercritical water. Enhancing radiative heat transfer can effectively increase the temperature of the reaction medium and the gasification rate.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Mauro Abela, Mauro Mameli, Sauro Filippeschi, Brent S. Taft
Summary: Pulsating Heat Pipes (PHP) are passive two-phase heat transfer devices with a simple structure and high heat transfer capabilities. The actual unpredictability of their dynamic behavior during startup and thermal crisis hinders their large-scale application. An experimental apparatus is designed to investigate these phenomena systematically. The results show that increasing the number of evaporator sections and condenser temperature improves the performance of PHP. The condenser temperature also affects the initial liquid phase distribution and startup time.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Ke Gan, Ruilian Li, Yi Zheng, Hui Xu, Ying Gao, Jiajie Qian, Ziming Wei, Bin Kong, Hong Zhang
Summary: A 3-dimensional enhanced heat pipe radiator has been developed to improve heat dissipation and temperature uniformity in cooling high-power electronic components. Experimental results show that the radiator has superior heat transfer performance compared to a conventional aluminum fin radiator under different heating powers and wind speed conditions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xinyi Zhang, Shuzhong Wang, Daihui Jiang, Zhiqiang Wu
Summary: This study focuses on recovering waste heat from blast furnace slag using dry centrifugal pelletizing technology. A comprehensive two-dimensional model was developed to analyze heat transfer dynamics and investigate factors influencing heat exchange efficiency. The findings have important implications for optimizing waste heat recovery and ensuring safe operations.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xincheng Wu, An Zou, Qiang Zhang, Zhaoguang Wang
Summary: The boosting heat generation rate of high-performance processors is challenging traditional cooling techniques. This study proposes a combined design of active jet intermittency and passive surface modification to enhance heat transfer.
APPLIED THERMAL ENGINEERING
(2024)
