Article
Energy & Fuels
Wenhui Tao, Tao Sun, Wenjun Guo, Kangbo Lu, Lei Shi, He Lin
Summary: Diesel fuel pilot injection timing, pilot mass percent, and methanol substitution rate were experimentally investigated to study their effects on the combustion and emissions of a diesel-methanol dual fuel engine. The results showed that adding pilot injection advanced the ignition time and increased the heat release rate. With the increase in pilot mass percent, the peak in-cylinder pressure and heat release rate increased. Furthermore, at high methanol substitution rates, advancing the pilot injection timing, increasing the pilot mass percent, and combining exhaust gas recirculation (EGR) were found to improve combustion performance and reduce emissions.
Article
Chemistry, Applied
Ahmad O. Hasan, Ahmed I. Osman, Ala'a H. Al-Muhtaseb, Hani Al-Rawashdeh, Ahmad Abu-jrai, Riad Ahmad, Mohamed R. Gomaa, Tanmay J. Deka, David W. Rooney
Summary: The study found that blended methanol can reduce HC and CO emissions in tailpipe, but increase NOx emissions; smoke emissions significantly decrease as the percentage of methanol in blends increases. Pure diesel showed higher brake thermal efficiency and lower fuel consumption at all engine loads.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Engineering, Environmental
Hao Chen, Jingjing He, Zhanming Chen, Limin Geng
Summary: This study conducted a comparative study on the combustion characteristics and performances of a dual-fuel engine fueled with different fuels, revealing that using P50/methanol fuel can increase peak cylinder pressure, decrease first peak heat release rate, and reduce ignition delay and combustion duration. Additionally, the NOx emissions and particulate matter produced by the P50/methanol engine were lower than those produced by the diesel/methanol engine for specific MSR and engine load conditions.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Thermodynamics
Jiangjun Wei, Zenghui Yin, Chunmei Wang, Gang Lv, Yuan Zhuang, Xiangrong Li, Han Wu
Summary: The study demonstrates that adding aluminum oxide (AL(2)O(3)) nanoparticles to diesel-methanol blends can significantly improve engine performance, including enhancing peak in-cylinder pressure and thermal efficiency, reducing ignition delay and combustion duration, as well as decreasing fuel consumption and energy consumption, and lowering CO, HC, and smoke emissions.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Mustafa Vargun, Ilker Turgut Yilmaz, Cenk Sayin
Summary: The study found that adding clean fuels such as methanol, ethanol, and n-heptane to diesel can effectively reduce emissions, improve fuel economy, and increase maximum brake thermal efficiency. Results from using blended fuels showed a significant decrease in CO2 emissions and a reduction in HC emissions with an increase in engine load.
Article
Thermodynamics
Jiangjun Wei, Chengjun He, Gang Lv, Yuan Zhuang, Yejian Qian, Suozhu Pan
Summary: The study showed that adding SiO2 nanoparticles to methanol could increase the peak pressure and peak heat release rate of a diesel engine, improve fuel efficiency and reduce emissions of CO, HC, NOx, and smoke.
Article
Energy & Fuels
Zhiyong Li, Yang Wang, Zibin Yin, Zhanbin Gao, Yongjian Wang, Xudong Zhen
Summary: This study investigates the effects of dual-fuel injector parameters on the performance and emissions of a diesel/methanol dual-fuel direct injection engine using a three-dimensional simulation model. The results show that the combination of nozzle number and diameter has a significant impact on fuel economy and emissions, and the spray spatial angle also has some influence on performance and emissions.
Article
Energy & Fuels
Ao Zhou, Hui Jin, Wenhan Cao, Ming Pang, Yangyang Li, Chao Zhu
Summary: An experimental study was conducted to investigate the effects of pilot injection timing and period on the two-stage combustion process in methanol-diesel dual-fuel engines. The results showed that advancing pilot injection timing reduced combustion noise and advanced the start of the main injection diesel combustion.
Article
Energy & Fuels
Qingshan Chen, Chenfang Wang, Kun Shao, Yi Liu, Xuefeng Chen, Yejian Qian
Summary: This study investigates the effects of primary alcohol and aluminum nano-additives on the combustion and emission characteristics of a direct injection diesel engine. The results show that the addition of methanol has the most significant promotion effects on combustion, while n-butanol has the most obvious effect at low load. The addition of Al2O3 nanoparticles improves the combustion process, but leads to increased NOX emissions.
Article
Engineering, Marine
Michal Puskar, Pavol Tarbajovsky, Matus Lavcak, Marieta Soltesova
Summary: The International Maritime Organisation sets standards to limit harmful emissions produced by marine ancillary diesel engines. To meet these restrictions, new alternative fuels have been introduced and experiments have been conducted to investigate their influence on engine operation.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Thermodynamics
Akhilendra Pratap Singh, Nikhil Sharma, Vikram Kumar, Avinash Kumar Agarwal
Summary: Global warming and strict emission regulations are major concerns for the road transport sector, driving researchers to explore advanced combustion technologies such as Reactivity Controlled Compression Ignition combustion. This experimental study compared baseline compression ignition combustion with RCCI combustion, showing that RCCI combustion delivered higher thermal efficiency, stability, and lower emissions. Optimization of the premixed ratio of methanol is crucial for achieving the best results in RCCI combustion at different engine loads.
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2021)
Article
Thermodynamics
Avinash Kumar Agarwal, Vikram Kumar, Ashutosh Jena Ankur Kalwar
Summary: The future reliance on heavy-duty diesel engines in the transport, agriculture, marine, and power generation sectors, despite emission concerns, can be addressed by adopting alternative fuels like methanol. Retrofitting existing engines for methanol adaptation proves to be a practical solution, as observed in the performance and emissions evaluation of a commercial Genset CI engine.
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
Yang Wang, Ge Xiao, Bo Li, Hua Tian, Xianyin Leng, Yang Wang, Dongsheng Dong, Wuqiang Long
Summary: This study investigates the effects of high methanol substitution ratio (MSR) on the combustion performance of diesel-methanol diffusion combustion (DMDC) mode. The results show that DMDC mode can significantly reduce NOx and soot emissions, and improve indicated thermal efficiency (ITE) at high engine loads.
Article
Engineering, Environmental
Sehmus Altun, Mujdat Firat, Yasin Varol, Mutlu Okcu
Summary: This study compares methanol dual-direct injection (DI2 mode) with port injection of methanol (RCCI mode) when using biodiesel and diesel fuel as High Reactivity Fuels (HRFs). DI2 shows reductions in unburned HC and CO emissions compared to RCCI mode, and slightly higher NOx emissions. In RCCI mode, NOx emissions are significantly reduced, while CO and unburned HC emissions are higher. The study also investigates the effects of premixed ratio (Rp) on combustion performance and ignition delay, finding that DI2 can control inefficient combustion during RCCI operation fueled by diesel fuel and biodiesel.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Thermodynamics
Lei Zhu, C. S. Cheung, Zhen Huang
APPLIED THERMAL ENGINEERING
(2016)
Article
Thermodynamics
Z. L. Wei, C. W. Leung, C. S. Cheung, Z. H. Huang
Article
Thermodynamics
L. Wei, C. S. Cheung, Z. Ning
Article
Engineering, Environmental
Zhi-Hui Zhang, Rajasekhar Balasubramanian
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2017)
Article
Energy & Fuels
Z. L. Wei, H. S. Zhen, C. W. Leung, C. S. Cheung, Z. H. Huang
Article
Energy & Fuels
Ke Yang, Long Wei, C. S. Cheung, Chenglong Tang, Zuohua Huang
Article
Engineering, Chemical
Nirmal Kumar Gali, Fenhuan Yang, Chun Shun Cheung, Zhi Ning
JOURNAL OF AEROSOL SCIENCE
(2017)
Article
Engineering, Chemical
Chun Guan, C. S. Cheung, Xinling Li, Dongfang Li, Zhen Huang
JOURNAL OF AEROSOL SCIENCE
(2017)
Article
Environmental Sciences
Chun Guan, C. S. Cheung, Xinling Li, Zhen Huang
ATMOSPHERIC POLLUTION RESEARCH
(2017)
Article
Thermodynamics
Meisam Ahmadi Ghadikolaei, Chun Shun Cheung, Ka-Fu Yung
Article
Energy & Fuels
Zhi-Hui Zhang, Rajasekhar Balasubramanian
Article
Green & Sustainable Science & Technology
Zhihui Zhang, Wen Li, Jiang Wu, Lihe Chai
JOURNAL OF CLEANER PRODUCTION
(2020)
Article
Thermodynamics
Meisam Ahmadi Ghadikolaei, Chun Shun Cheung, Ka-Fu Yung, Pak Kin Wong
Summary: The study explores the impacts of blending, fumigating, and combined fumigating+blending methods on engine combustion and cyclic variability parameters compared to diesel method. It is found that blending method has slightly longer overall combustion progression, fumigating method has minimal effect, and both blending and fumigating methods increase COVIMEP.
INTERNATIONAL JOURNAL OF GREEN ENERGY
(2021)
Article
Thermodynamics
Chun Guan, C. S. Cheung, Z. Ning, P. K. Wong, Zhen Huang
APPLIED THERMAL ENGINEERING
(2017)
Article
Environmental Sciences
Zhi-Hui Zhang, Andrey Khlystov, Leslie K. Norford, Zhen-Kang Tan, Rajasekhar Balasubramanian
ATMOSPHERIC ENVIRONMENT
(2017)
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.
