Article
Thermodynamics
S. Janakiraman, T. Lakshmanan, P. Raghu
Summary: The ternary fuel blends with metal-doped TiO2 nano additives can reduce fuel usage and emissions of diesel engines, with Blend 6 (20% Biodiesel + 10% Bio-ethanol + 70% Diesel fuel+ TiO2(65 ppm)) showing superior performance in terms of minimal BTE, higher BSEC, higher cylinder pressure and lower emissions compared to 100% diesel fuel.
Article
Energy & Fuels
Zhao Zhang, Xin Liu, Haifeng Liu, Yangyi Wu, M. Zaman, Zhenlong Geng, Chao Jin, Zunqing Zheng, Zongyu Yue, Mingfa Yao
Summary: This study conducted an experimental investigation on the combustion and emission characteristics of soybean oil/PODE/ethanol blends in a diesel engine, finding that CA50 has a significant influence on brake thermal efficiency, NOx emissions, and soot emissions. Comparing the two soybean oil blended fuels, S70P15E15 and S70P30 showed similar soot emissions, with S70P15E15 lower in NOx emissions and weighted BSFC.
Article
Energy & Fuels
Ashutosh Jena, Utkarsha Sonawane, Avinash Kumar Agarwal
Summary: In this study, the engine characteristics of a light-duty commercial diesel engine operated in partially premixed combustion (PPC) mode with lower and higher DEE-diesel blends were investigated. The PPC mode exhibited higher/comparable brake thermal efficiency (BTE) compared to the baseline conventional diesel combustion (CDC) mode. However, the PPC mode showed higher nitrogen oxide (NOx) emissions and requires further optimization.
Article
Energy & Fuels
Xichang Wang, Chao Geng, Juntong Dong, Xiaodan Li, Teng Xu, Chao Jin, Haifeng Liu, Bin Mao
Summary: Polyoxymethylene dimethyl ethers (PODE) can enhance the miscibility of ethanol/diesel blends, while the pilot injection strategy can improve combustion noise and NOx emissions. The study shows that optimizing the pilot injection strategy can improve the thermal efficiency and reduce hazardous gas emissions of the blends.
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
Energy & Fuels
Usman Asad, Prasad S. Divekar, Ming Zheng
Summary: Dual-fuel combustion of ethanol and diesel in a high-compression ratio diesel engine showed improved combustion performance, reduced NOx and soot emissions, and increased net indicated efficiency compared to conventional diesel high-temperature combustion. The use of renewable bio-fuels such as ethanol in dual-fuel combustion can help reduce reliance on fossil fuels, lower greenhouse gas emissions, and enhance the viability of diesel engines for heavy-duty transport applications.
Article
Energy & Fuels
Swapnil Bhurat, Shyam Pandey, Venkateshwarlu Chintala, Manas Jaiswal, Caneon Kurein
Summary: Partially pre-mixed charge compression ignition (PCCI) and combustion chamber geometry play significant roles in improving the potential of compression ignition engines and their impact on the environment. Experimentation with a novel fuel vaporizer technology in a single-cylinder DI diesel engine showed improvements in engine characteristics when using PCCI mode with a toroidal combustion chamber (TCC) piston. Results demonstrated that PCCI mode effectively reduced NOx emissions and improved engine efficiency, but also showed limitations such as increased pressure rise rate at full engine load. The study suggests that the limitations of PCCI can be mitigated by utilizing TCC piston geometry, but the usage of PCCI is constrained by specific vapor flow rates and engine load ranges.
Article
Environmental Sciences
Navarun Saikia, Ramadhas Arumugam Sakunthalai, Maya Chakradhar, Sithananthan Masilamani, Muhul Maheshwari, Deepak Saxena
Summary: Fuel economy improvement and reducing exhaust emissions are driving forces for the advancement of engine technology and fuel quality enhancement. This study explores the effect of high cetane diesel on the performance and emission behavior of SCR fitted heavy-duty engines, and it has been found that using high cetane diesel can reduce fuel consumption and exhaust emissions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Energy & Fuels
Yingying Lu, Chao Fan, Yufeng Chen, Yize Liu, Yiqiang Pei
Summary: This study investigates the effects of a multiple injection strategy on premixed charge compression ignition (PCCI) combustion and emissions in a heavy-duty diesel engine fueled with diesel. Through experiments and numerical simulations, it was found that optimizing the injection strategy can reduce NOx and soot emissions, while improving the gross indicated thermal efficiency (ITEg).
Article
Thermodynamics
Caifeng Hao, Zhen Lu, Yizhuo Feng, Honglin Bai, Ming Wen, Tianyou Wang
Summary: The study shows that the fuel split device (FSD) can improve fuel/air mixing process by splitting fuel spray, increasing air utilization and enhancing combustion efficiency. The FSD expands fuel injection area and forms multi-vortex structure, resulting in improved fuel/air mixing process and reduced emissions.
APPLIED THERMAL ENGINEERING
(2021)
Article
Engineering, Chemical
Tiantian Yang, Dongdong Chen, Lei Liu, Longyan Zhang, Tie Wang, Guoxing Li, Haiwei Chen, Yao Chen
Summary: To reduce emissions and save energy, alternative fuel and dual-fuel mode have been widely applied in diesel engines. The effects of a diesel fuel pilot injection strategy on the performance of an ethanol/F-T diesel dual-fuel engine were experimentally investigated. The results show that pilot injection timing has a small effect on combustion characteristics parameters but tends to decrease soot, NOx, and CO emissions.
Article
Thermodynamics
Nicola Giramondi, Anders Jager, Daniel Norling, Anders Christiansen Erlandsson
Summary: Ethanol is a valuable alternative to fossil fuels due to its properties and production pathways, with potential benefits in reducing emissions. The study experimentally investigates the simultaneous direct injection of pure ethanol and diesel in a heavy-duty engine, evaluating the influence of diesel injector configurations on ethanol combustion and engine performance. Results show that mixing-controlled combustion of ethanol is achieved with all tested diesel injector configurations, with the one-spray injector being the most robust trigger for ethanol ignition.
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2021)
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
Zhanming Chen, Jingjing He, Hao Chen, Limin Geng, Peng Zhang
Summary: A comparative study on the effects of energy substitution ratio (ESR) on the combustion characteristics and performance of a dual fuel engine fueled with diesel/alcohols was conducted. Premixed combustion of diesel was influenced by alcohol enrichment, affecting ignition delay and combustion duration. Methanol was found to be most beneficial in prolonging ignition delay and shortening combustion duration. Energy substitution ratio also affected brake thermal efficiency (BTE) and NOx emissions differently for different alcohol types.
Article
Energy & Fuels
Amin Yousefi, Hongsheng Guo, Shouvik Dev, Brian Liko, Simon Lafrance
Summary: This study investigates the feasibility of an ammonia/diesel dual-fuel engine in reducing greenhouse gas emissions while maintaining diesel-like efficiency. Results show that increasing the ammonia energy fraction reduces nitrogen oxide emissions but increases nitrous oxide emissions, resulting in higher overall greenhouse gas emissions compared to diesel-only combustion. Advancing the start of diesel injection helps reduce nitrous oxide and overall greenhouse gas emissions while achieving diesel-like thermal efficiency.
Article
Thermodynamics
Tae Young Kim, Seokhwan Lee, Kernyong Kang
Article
Engineering, Chemical
Inyong Park, Janghee Lee, Seokhwan Lee
AEROSOL SCIENCE AND TECHNOLOGY
(2017)
Article
Thermodynamics
Tae Young Kim, Seokhwan Lee, Janghee Lee
ENERGY CONVERSION AND MANAGEMENT
(2016)
Article
Energy & Fuels
Seokhwan Lee, Young Choi, Kernyong Kang
Article
Energy & Fuels
Sunyoup Lee, Changgi Kim, Seokhwan Lee, Jeongwoo Lee, Junghwan Kim
Article
Engineering, Mechanical
Sang-Hee Woo, Yongrae Kim, Sunyoup Lee, Young Choi, Seokhwan Lee
Summary: The research found that mass concentrations of BWPs measured by APS were similar to gravimetric method results, while OPC and DustTrak underestimated the mass concentrations. QCM was not suitable for measuring BWPs due to sudden inflow of particles during braking.
Article
Environmental Sciences
Sang-Hee Woo, Hyungjoon Jang, Min Young Na, Hye Jung Chang, Seokhwan Lee
Summary: The physicochemical characteristics of micro- and nano-sized brake particles emitted from non-asbestos organic (NAO) and low-metallic (LM) brake pads were investigated under normal and harsh braking conditions. The study found that the LM pad emitted four times higher brake wear particles compared to the NAO pad. When the pad temperature exceeded the critical temperature, the concentration of volatile nanoparticles increased significantly, with the volatile NAO pad nanoparticles showing a higher concentration compared to LM pad nanoparticles.
ATMOSPHERIC ENVIRONMENT
(2022)
Article
Environmental Sciences
Yoonah Jeong, Seokhwan Lee, Sang-Hee Woo
Summary: This study investigated the trends of chemical leaching from tire wear particles (TWPs) and found that the treadwear rating of a tire can affect the chemical leaching and ecotoxicological influence.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Environmental Sciences
Sang-Hee Woo, Gunhee Lee, Bangwoo Han, Seokhwan Lee
Summary: Two different dust collectors were developed to reduce brake wear particulate matter emissions in this study, and their collection efficiencies for brake wear particles were evaluated according to brake pad type. The inertial separator showed similar collection efficiencies for low-metallic and non-asbestos organic pads, while the ESP had a higher collection efficiency for NAO pads due to the lower iron component in the particles generated from NAO pads.
Article
Environmental Sciences
Giwon Kang, Kyungil Cho, Jiyoon Shin, Soodong Lee, Seung-Bok Lee, Sang-Hee Woo, Seokhwan Lee, Changhyuk Kim
Summary: This study presents a real-time detection method for vehicle-originated condensable particulate matter (CPM) using a thermodenuder integrated with real-time aerosol instruments. The method allows for better capture of CPM concentrations and shows consistency with existing methods.
ENVIRONMENTAL RESEARCH
(2022)
Article
Energy & Fuels
Sechul Oh, Junho Oh, Hyeong-Jun Jang, Seokhwan Lee, Sunyoup Lee, Changgi Kim, Jeongwoo Lee
Summary: This study experimentally investigates the effects of modifications to the piston shape and injector nozzle on a natural gas-diesel dual-fuel reactivity-controlled compression ignition (RCCI) engine. The results show that both the bathtub shape piston and the multiangle two-layer injector are effective in reducing NOx and smoke emissions.
Article
Meteorology & Atmospheric Sciences
Seokhwan Lee, Sunyoup Lee, Yongrae Kim, Young Choi, Sang Hee Woo
JOURNAL OF KOREAN SOCIETY FOR ATMOSPHERIC ENVIRONMENT
(2019)
Article
Thermodynamics
Seokhwan Lee, Tae Young Kim
APPLIED THERMAL ENGINEERING
(2017)
Article
Meteorology & Atmospheric Sciences
Sang-Hee Woo, Yongrae Kim, Sunyoup Lee, Young Choi, Seokhwan Lee
JOURNAL OF KOREAN SOCIETY FOR ATMOSPHERIC ENVIRONMENT
(2020)
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.