Article
Chemistry, Physical
Jitender Singh Rawat, Subrata Bhowmik, Rajshekhar Panua, Pravin Ashok Madane, Manoj Kumar Triveni
Summary: This experimental work demonstrates the superiority of hydrogen fuel in ethanol-jatropha biodiesel blend in terms of performance, exhaust emission, and exergy parameters of a compression ignition engine.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
B. Karpanai Selvan, Soni Das, M. Chandrasekar, R. Girija, S. John Vennison, N. Jaya, P. Saravanan, M. Rajasimman, Yasser Vasseghian, N. Rajamohan
Summary: The study investigates the performance and emission characteristics of various biomass blends in a diesel engine. The results show that the AO10D blend performs well with higher thermal efficiency and lower emissions at 50% load.
Article
Energy & Fuels
Changlei Xia, Kathirvel Brindhadevi, Ashraf Elfasakhany, Mishal Alsehli, Siriporn Tola
Summary: The experimental study found that adding hydrogen can improve the combustion performance of compression ignition engines, while increasing the concentration of nanoparticles significantly improves brake thermal efficiency and reduces emissions. However, a slight decrease in NOx was observed under 75% engine load condition without the addition of nanoparticles.
Article
Energy & Fuels
Alireza Shirneshan, Seyed Amin Bagherzadeh, Gholamhassan Najafi, Rizalman Mamat, Mohamed Mazlan
Summary: The research investigated the combined effects of biodiesel-ethanol fuel blends on a diesel engine's performance and emission parameters using response surface methodology. Results showed that increasing ethanol in the fuel mixture decreased brake power and torque, while improving BSFC. Higher ethanol percentage led to reduced smoke and NOx emissions, while higher biodiesel percentage reduced CO emissions. Genetic algorithm optimization showed optimal conditions with 94.65% biodiesel, 2800 RPM, and 65.75% engine load. Ethanol was found to be more effective in improving emission characteristics than performance characteristics.
Article
Thermodynamics
Mehmet Zerrakki Isik
Summary: The experiments in the article showed that adding alcohols to biodiesel fuel can increase fuel consumption, but blending specific quantities of heavy alcohols with biodiesel can significantly improve engine brake thermal efficiency, combustion, and reduce emissions.
APPLIED THERMAL ENGINEERING
(2021)
Article
Environmental Sciences
M. Sangeetha, P. Boomadevi, Amany Salah Khalifa, Kathirvel Brindhadevi, Manigandan Sekar
Summary: The high price and depletion of petroleum fuel demand pushes the search for alternatives. The fossil fuel shortage has worsened in recent years due to rapid population growth. This paper analyzes the effects of additives on chlorella microalgae biofuel through experimental methods, finding that nanoparticles such as CNT and alumina reduce emissions and improve combustion and performance qualities.
Article
Energy & Fuels
Hassanain AbdulRahman Allami, Hamed Nayebzadeh
Summary: The study focused on producing biodiesel from waste cooking oil using two types of catalyst and blending it with net diesel fuel for use in a diesel engine. The results showed that the heterogeneous catalyst led to a shorter production time but higher energy consumption. Blending biodiesel with diesel slightly improved engine performance and combustion behavior.
Article
Environmental Sciences
Suravarapu Charan Kumar, Amit Kumar Thakur, Ronald Aseer John Joseph Raj, Sendhil Kumar Natarajan
Summary: The need for non-renewable fuels is decreasing due to cost and pollution concerns, leading to the use of renewable fuels like biofuel as a substitute for diesel. The effects of magnesia and alumina nanoparticles on the performance and emissions of a CI engine running on spirulina biodiesel were studied. Results showed that doping these nanoparticles in the biodiesel increased thermal efficiency and nitrogen oxide emissions while reducing fuel consumption and hydrocarbon emissions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Mallesh B. Sanjeevannavar, N. R. Banapurmath, Manzoore Elahi M. Soudagar, Vinay Atgur, Nazia Hossain, M. A. Mujtaba, T. M. Yunus Khan, B. Nageswar Rao, Khadiga Ahmed Ismail, Ashraf Elfasakhany
Summary: The experimental study examines the impact of biodiesel produced from Jatropha oil on engine performance and emissions. The addition of hydrogen peroxide as a fuel additive improves combustion efficiency and reduces emissions. Specific fuel blends show significant improvements in brake thermal efficiency and reductions in emissions compared to conventional diesel blends.
Article
Engineering, Multidisciplinary
Luqman Razzaq, M. A. Mujtaba, M. A. Shahbaz, Saad Nawaz, Haris Mahmood Khan, Abrar Hussain, Usama Ishtiaq, M. A. Kalam, Manzoore Elahi M. Soudagar, Khadiga Ahmed Ismail, Ashraf Elfasakhany, Hafiz Muhmmad Rizwan
Summary: This study investigates the effect of palm biodiesel blends with and without oxygenated alcohol dimethyl carbonate (DMC) on compression ignition engine. The results show that the engine performance improves and emissions decrease when an antioxidant is added.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Luis Tipanluisa, Natalia Fonseca, Jesus Casanova, Jose-Maria Lopez
Summary: This study investigates the effects of different n-butanol/diesel fuel blends on a Euro V heavy-duty diesel engine's performance and emissions. The results show that using n-butanol can improve engine performance and reduce particulate emissions in most operating conditions, while increasing CO emissions. The study also indicates that THC emissions increase with n-butanol content, while NO2 emissions decrease.
Article
Thermodynamics
Sudarshan Gowrishankar, Anand Krishnasamy
Summary: This study investigated the effectiveness of using emulsions prepared with water and ethanol to reduce NOx emissions and improve smoke emissions in biodiesel. The results showed that emulsified biodiesel provided significant benefits in terms of reduced exhaust emissions and improved engine performance.
Article
Thermodynamics
Mukesh Kumar, Bijan Kumar Mandal, Aritra Ganguly, Ravikant Ravi, Tabish Alam, Md Irfanul Haque Siddiqui, Sayed M. Eldin
Summary: The main objective of this study is to determine the performance, combustion, and emission analysis of compression ignition engines fueled with Chlorella Protothecoides microalgal biodiesel (CPMB). The results show that the performance of B20 blends is nearly identical to diesel, making it a feasible alternative fuel for engines.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Suozhu Pan, Jiangjun Wei, Changfa Tao, Gang Lv, Yejian Qian, Qiang Liu, Weiqiang Han
Summary: This study investigates the effects of cerium oxide nanoparticles on the performance and emissions of a diesel engine. The results show that methanol-based nanofluids with CeO2 nanoparticles can improve engine thermal efficiency and reduce emissions compared to pure methanol mode.
Article
Energy & Fuels
Mehmet Celik
Summary: The study conducted experiments in two stages to investigate the effects of adding n-heptane and organic based manganese additives on biodiesel performance and emissions characteristics. The results showed that additives in CH8 and CH8Mn12 fuels significantly improved engine performance and reduced emissions.
Article
Energy & Fuels
Yingna Du, Chen Huang, Wei Jiang, Qiangwei Yan, Yongfei Li, Gang Chen
Summary: In this study, anionic surfactants modified hydrotalcite was used as a flow improver for crude oil under low-temperature conditions. The modified hydrotalcite showed a significant viscosity reduction effect on crude oil. The mechanism of the modified hydrotalcite on viscosity and pour point of crude oil was explored through characterization and analysis of the modified hydrotalcite and oil samples.
Article
Energy & Fuels
Mohammad Saeid Rostami, Mohammad Mehdi Khodaei
Summary: In this study, a hybrid structure, MIL-53(Al)@MWCNT, was synthesized by combining MIL-53(Al) particles and -COOH functionalized multi-walled carbon nanotube (MWCNT). The hybrid structure was then embedded in a polyethersulfone (PES) polymer matrix to prepare a mixed matrix membrane (MMM) for CO2/CH4 and CO2/N2 separation. The addition of MWCNTs prevented MIL-53(Al) aggregation, improved membrane mechanical properties, and enhanced gas separation efficiency.
Article
Energy & Fuels
Yunlong Li, Desheng Huang, Xiaomeng Dong, Daoyong Yang
Summary: This study develops theoretical and experimental techniques to determine the phase behavior and physical properties of DME/flue gas/water/heavy oil systems. Eight constant composition expansion (CCE) tests are conducted to obtain new experimental data. A thermodynamic model is used to accurately predict saturation pressure and swelling factors, as well as the phase boundaries of N2/heavy oil systems and DME/CO2/heavy oil systems, with high accuracy.
Article
Energy & Fuels
Morteza Afkhamipour, Ebad Seifi, Arash Esmaeili, Mohammad Shamsi, Tohid N. Borhani
Summary: Non-conventional amines are being researched worldwide to overcome the limitations of traditional amines like MEA and MDEA. Adequate process and thermodynamic models are crucial for understanding the applicability and performance of these amines in CO2 absorption, but studies on process modeling for these amines are limited. This study used rate-based modeling and Deshmukh-Mather method to model CO2 absorption by DETA solution in a packed column, validated the model with experimental data, and conducted a sensitivity analysis of mass transfer correlations. The study also compared the CO2 absorption efficiency of DETA solution with an ionic solvent [bmim]-[PF6] and highlighted the importance of finding optimum operational parameters for maximum absorption efficiency.
Article
Energy & Fuels
Arastoo Abdi, Mohamad Awarke, M. Reza Malayeri, Masoud Riazi
Summary: The utilization of smart water in EOR operations has gained attention, but more research is needed to understand the complex mechanisms involved. This study investigated the interfacial tension between smart water and crude oil, considering factors such as salt, pH, asphaltene type, and aged smart water. The results revealed that the hydration of ions in smart water plays a key role in its efficacy, with acidic and basic asphaltene acting as intrinsic surfactants. The pH also influenced the interfacial tension, and the aged smart water's interaction with crude oil depended on asphaltene type, salt, and salinity.
Article
Energy & Fuels
Dongao Zhu, Kun Zhu, Lixian Xu, Haiyan Huang, Jing He, Wenshuai Zhu, Huaming Li, Wei Jiang
Summary: In this study, cobalt-based metal-organic frameworks (Co-based MOFs) were used as supports and co-catalysts to confine the NHPI catalyst, solving the leaching issue. The NHPI@Co-MOF with carboxyl groups exhibited stronger acidity and facilitated the generation of active oxygen radicals O2•, resulting in enhanced catalytic activity. This research provides valuable insights into the selection of suitable organic linkers and broadens the research horizon of MOF hybrids in efficient oxidative desulfurization (ODS) applications.
Article
Energy & Fuels
Edwin G. Hoyos, Gloria Amo-Duodu, U. Gulsum Kiral, Laura Vargas-Estrada, Raquel Lebrero, Rail Munoz
Summary: This study investigated the impact of carbon-coated zero-valent nanoparticle concentration on photosynthetic biogas upgrading. The addition of nanoparticles significantly increased microalgae productivity and enhanced nitrogen and phosphorus assimilation. The presence of nanoparticles also improved the quality of biomethane produced.
Article
Energy & Fuels
Yao Xiao, Asma Leghari, Linfeng Liu, Fangchao Yu, Ming Gao, Lu Ding, Yu Yang, Xueli Chen, Xiaoyu Yan, Fuchen Wang
Summary: Iron is added as a flocculant in wastewater treatment and the hydrothermal carbonization (HTC) of sludge produces wastewater containing Fe. This study investigates the effect of aqueous phase (AP) recycling on hydrochar properties, iron evolution and environmental assessment during HTC of sludge. The results show that AP recycling process improves the dewatering performance of hydrochar and facilitates the recovery of Fe from the liquid phase.
Article
Energy & Fuels
He Liang, Tao Wang, Zhenmin Luo, Jianliang Yu, Weizhai Yi, Fangming Cheng, Jingyu Zhao, Xingqing Yan, Jun Deng, Jihao Shi
Summary: This study investigated the influence of inhibitors (carbon dioxide, nitrogen, and heptafluoropropane) on the lower flammability limit of hydrogen and determined the critical inhibitory concentration needed for complete suppression. The impact of inhibitors on explosive characteristics was evaluated, and the inhibitory mechanism was analyzed with chemical kinetics. The results showed that with the increase of inhibitor quantity, the lower flammability limit of hydrogen also increased. The research findings can contribute to the safe utilization of hydrogen energy.
Article
Energy & Fuels
Zonghui Liu, Zhongze Zhang, Yali Zhou, Ziling Wang, Mingyang Du, Zhe Wen, Bing Yan, Qingxiang Ma, Na Liu, Bing Xue
Summary: In this study, high-performance solid catalysts based on phosphotungstic acid (HPW) supported on Zr-SBA-15 were synthesized and evaluated for the one-pot conversion of furfural (FUR) to γ-valerolactone (GVL). The catalysts were characterized using various techniques, and the ratio of HPW and Zr was found to significantly affect the selectivity of GVL. The HPW/Zr-SBA-15 (2-4-15) catalyst exhibited the highest GVL yield (83%) under optimized reaction conditions, and it was determined that a balance between Bronsted acid sites (BAS) and Lewis acid sites (LAS) was crucial for achieving higher catalytic performance. The reaction parameters and catalyst stability were also investigated.
Article
Energy & Fuels
Michael Stoehr, Stephan Ruoff, Bastian Rauch, Wolfgang Meier, Patrick Le Clercq
Summary: As part of the global energy transition, an experimental study was conducted to understand the effects of different fuel properties on droplet vaporization for various conventional and alternative fuels. The study utilized a flow channel to measure the evolution of droplet diameters over time and distance. The results revealed the temperature-dependent effects of physical properties, such as boiling point, liquid density, and enthalpy of vaporization, and showed the complex interactions of preferential vaporization and temperature-dependent influences of physical properties for multi-component fuels.
Article
Energy & Fuels
Yuan Zhuang, Ruikang Wu, Xinyan Wang, Rui Zhai, Changyong Gao
Summary: Through experimental validation and optimization of the chemical kinetic model, it was found that methanol can accelerate the oxidation reaction of ammonia, and methanol can be rapidly oxidized at high concentration. HO2 was found to generate a significant amount of OH radicals, facilitating the oxidation of methanol and ammonia. Rating: 7.5/10.
Article
Energy & Fuels
Radwan M. EL-Zohairy, Ahmed S. Attia, A. S. Huzayyin, Ahmed I. EL-Seesy
Summary: This paper presents a lab-scale experimental study on the impact of diethyl ether (DEE) as an additive to waste cooking oil biodiesel with Jet A-1 on combustion and emission features of a swirl-stabilized premixed flame. The addition of DEE to biodiesel significantly affects the flame temperature distribution and emissions. The W20D20 blend of DEE, biodiesel, and Jet A-1 shows similar flame temperature distribution to Jet A-1 and significantly reduces UHC, CO, and NOx emissions compared to Jet A-1.
Article
Energy & Fuels
Jiang Bian, Ziyuan Zhao, Yang Liu, Ran Cheng, Xuerui Zang, Xuewen Cao
Summary: This study presents a novel method for ammonia separation using supersonic flow and develops a mathematical model to investigate the condensation phenomenon. The results demonstrate that the L-P nucleation model accurately characterizes the nucleation process of ammonia at low temperatures. Numerical simulations also show that increasing pressure and concentration can enhance ammonia condensation efficiency.
Article
Energy & Fuels
Shiyuan Pan, Xiaodan Shi, Beibei Dong, Jan Skvaril, Haoran Zhang, Yongtu Liang, Hailong Li
Summary: Integrating CO2 capture with biomass-fired combined heat and power (bio-CHP) plants is a promising method for achieving negative emissions. This study develops a reliable data-driven model based on the Transformer architecture to predict the flowrate and CO2 concentration of flue gas in real time. The model validation shows high prediction accuracy, and the potential impact of meteorological parameters on model accuracy is assessed. The results demonstrate that the Transformer model outperforms other models and using near-infrared spectral data as input features improves the prediction accuracy.