Article
Thermodynamics
Shang Liu, Zhelong Lin, Hao Zhang, Qinhao Fan, Nuo Lei, Zhi Wang
Summary: This paper investigates the effects of ethanol blending with different excess air ratios on the knock and combustion characteristics, output power, indicated thermal efficiency, and emissions in a high compression ratio, single-cylinder, four-stroke SICI engine. The results show that ethanol addition can suppress knock tendency, improve combustion stability, and increase power and thermal efficiency. However, the emissions and the size distribution of particulate matter are influenced by the ethanol blending ratio.
Article
Thermodynamics
Mortadha K. Mohammed, Hyder H. Balla, Zaid Maan H. Al-Dulaimi, Zaid S. Kareem, Mudhaffar S. Al-Zuhairy
Summary: The negative effects of traditional engine fuels on climate change have led to a high level of competition in finding alternative fuels that are more environmentally friendly. Alcohol fuels, particularly ethanol, have been found to be practical for blending with traditional engine fuels like gasoline. Research has shown that blending ethanol with gasoline can increase power, efficiency, and reduce harmful exhaust gases. However, ethanol may have a negative impact on volumetric efficiency, while also improving power and efficiency as its concentration increases.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Jiaying Pan, Zhen Hu, Zhenhua Pan, Gequn Shu, Haiqiao Wei, Tao Li, Changwen Liu
Summary: Ethanol as an oxygenate additive in gasoline can inhibit knocking tendency, delay auto-ignition timing, and reduce pressure oscillations in combustion. Turbulent mixing and energy density play roles in alleviating knocking intensity and promoting detonation development, but fuel reactivity remains the key factor in strong knocking formation and detonation development.
Article
Energy & Fuels
Lker Ors, Savas Yelbey, Halil Erdi Gulcan, Bahar Sayin Kul, Murat Ciniviz
Summary: This study analyzes the combustion behavior of an SI engine and evaluates its thermodynamic performance through energy and exergy analysis. The addition of small amounts of ethanol and methanol to gasoline is compared with gasoline as the reference fuel. The study demonstrates that the addition of ethanol and methanol increases the maximum in-cylinder pressure, while reducing the average in-cylinder gas temperature and increasing the pressure increase rates. The volumetric addition of ethanol/methanol to gasoline has a decreasing effect on thermal and exergetic efficiency values.
Article
Energy & Fuels
Shang Liu, Hao Zhang, Qinhao Fan, Wei Wang, Yunliang Qi, Zhi Wang
Summary: Spark induced compression ignition (SICI) is a promising method for achieving high thermal efficiency and robust combustion control. With the increase of compression ratio, the popularization of bioethanol, and the development of NOx emission control technologies, high-efficiency and clean SICI combustion can be achieved under medium-to-high load. Ethanol-contained fuels can accelerate flame propagation but suppress the heat release rate of autoignition.
Article
Energy & Fuels
Krishna C. Kalvakala, Pinaki Pal, Jorge Pulpeiro Gonzalez, Christopher P. Kolodziej, Hee Je Seong, Goutham Kukkadapu, Matthew McNenly, Scott Wagnon, Russell Whitesides, Nils Hansen, Suresh K. Aggarwal
Summary: In this study, computational fluid dynamics (CFD) simulations were used to investigate the impact of blending two biofuels, ethanol and n-butanol, with gasoline on combustion phasing and soot emissions in a low load engine. The results showed that both fuel chemistry and physical properties had an influence on combustion and soot emissions, with a greater effect observed at earlier injection timings.
Article
Engineering, Multidisciplinary
ZiLong Li, Yong Qian, Guan Huang, WenBin Zhao, YaoYuan Zhang, XingCai Lu
Summary: The ICCI combustion mode, characterized by dual high-pressure common-rail direct injection systems, enables high efficiency and clean combustion in wide engine operating ranges by flexibly adjusting in-cylinder air-fuel mixtures and obtaining suitable combustion phase and heat release rate. The mode achieves around 50% indicated thermal efficiency and low NO(x) emissions, making it a promising option for energy conservation and environmental improvement in automotive industry.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2021)
Article
Energy & Fuels
Wenbin Zhao, Haoqing Wu, Shijie Mi, Yaoyuan Zhang, Zhuoyao He, Yong Qian, Xingcai Lu
Summary: This study investigates the effect of biodiesel and butanol direct injection strategies and intake conditions on the performance of a dual-fuel combustion mode known as intelligent charge compression ignition (ICCI). The results show that increasing butanol energy ratio and delaying biodiesel direct injection timing can improve engine efficiency and combustion stability under low engine load. The applicable intake pressure for ICCI operation can optimize combustion efficiency and phasing, leading to low NOx emissions at certain intake pressure conditions. However, higher intake pressure can increase particle matter emissions.
Article
Chemistry, Multidisciplinary
Xiang Li, Yiqiang Pei, Dayou Li, Tahmina Ajmal, Abdel Aitouche, Raouf Mobasheri, Zhijun Peng
Summary: Utilizing ethanol blends in gasoline engines can extend ignition delay and combustion duration, leading to increased fuel consumption efficiency. Increasing oxygen mass fraction has a minor impact on engine performance but boosts oxygen consumption. Raising intake temperature slightly increases fuel consumption and oxygen consumption, while reducing ignition delay and combustion duration, and advancing certain key parameters such as phi(CA50) and phi(Pmax).
Article
Energy & Fuels
Wenjun Zhong, Qilong Xiang, Tamilselvan Pachiannan, Nasreldin M. Mahmoud, Bei Li, Zhixia He, Qian Wang, Jianbing Sun
Summary: Gasoline compression ignition engine offers high thermal efficiency and low emissions, but faces ignition difficulty and knocking combustion limitations. Increasing gasoline ratio reduces in-flame soot mass and combustion duration, while higher hydrogenated catalytic biodiesel ratio increases total soot particle emission. The concentration of particle size is mainly influenced by blend ratio of hydrogenated catalytic biodiesel and injection strategies.
Article
Multidisciplinary Sciences
Manal Amine, Hoda A. Mohammed, Y. Barakat
Summary: The effect of blending the fuel additive DMC into gasoline was studied in terms of its impact on the physicochemical properties. The results showed that DMC has a minimal effect on fuel volatility but significantly increases the octane rating.
SCIENTIFIC REPORTS
(2022)
Article
Energy & Fuels
Yaoyuan Zhang, Wenbin Zhao, Haoqing Wu, Zhuoyao He, Yong Qian, Xingcai Lu
Summary: The intelligent charge compression ignition (ICCI) dual-fuel combustion mode achieves high efficiency and clean combustion by organizing continuous stratification within a wide range of engine load. This study investigated the performance of alcohol blended gasoline as a low-reactivity fuel (LRF) in ICCI combustion mode. The results showed that ethanol and ethanol-gasoline blended fuel promoted homogeneous combustion and reduced soot emissions, although there was a slight increase in NOx emissions. The maximum indicated thermal efficiency decreased as the ethanol ratio in the LRF increased, but it helped suppress the formation of unregulated emissions.
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2022)
Article
Energy & Fuels
Alexis Cova-Bonillo, Rayda Patino-Camino, Juan Jose Hernandez, Magin Lapuerta
Summary: This study analyzes the impact of water concentration in ethanol on the autoignition characteristics of ethanol-diesel blends. The results indicate that water content has little effect on autoignition times in general, but acts as a reactivity inhibitor at low hydrated ethanol contents and as an autoignition enhancer at higher concentrations. The chemical effect associated with water as a third-body becomes more important at higher concentrations.
Article
Thermodynamics
Qijun Tang, Kai Ren, Xinyan Xie, Tao Chen, Ping Jiang, Daqing Zhang
Summary: This study experimentally investigated the effect of ABE and gasoline blends on knocking performance in a spark-ignition engine. The results showed that ABE can be used as a blended fuel to suppress knocking tendency.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Energy & Fuels
Budi Waluyo, Muji Setiyo, Saifudin, I. N. G. Wardana
Summary: This study investigates the fuel performance of stable homogeneous gasoline-methanol-ethanol blends. Results showed that after adding ethanol, the mixture no longer separated. In performance tests, the G-90 and G-95 blends exhibited the highest torque output.
Article
Thermodynamics
Jin Xia, Qiankun Zhang, Jianping Wang, Zhuoyao He, Qiyan Zhou, Dezhi Zhou, Yong Qian, Dehao Ju, Xingcai Lu
Summary: This study investigates the effects of different collision angles and critical conditions on the twin-spray collision process using optical techniques. The results show that higher collision velocity enhances mass transfer, while a smaller vertical component results in smaller axial dispersion. Under a collision angle of 150 degrees, a subcritical condition tends to result in an off-axis collision.
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2023)
Article
Engineering, Mechanical
Jianping Wang, Qiankun Zhang, Jin Xia, Liang Yu, Dezhi Zhou, Yong Qian, Xingcai Lu
Summary: This study investigates the spray characteristics of aviation kerosene (RP-3) under sub/trans/supercritical conditions. The effects of nozzle diameter and injection pressure on the spray characteristics are studied. The results show that the spray characteristics of kerosene differ under different critical conditions. Nozzle diameter has a stronger effect on kerosene spray compared to diesel spray, while injection pressure has a negligible effect on spray macroscopic characteristics.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING
(2023)
Article
Thermodynamics
Wenbin Zhao, Shijie Mi, Haoqing Wu, Yaoyuan Zhang, Qiankun Zhang, Zhuoyao He, Yong Qian, Xingcai Lu
Summary: This study investigated the mode switching between ICCI low temperature combustion and conventional CI combustion in a single-cylinder diesel engine, finding that smooth mode switching can be achieved at medium and high engine loads with various control parameters. EGR strategy was used to improve combustion smoothness and NOx emissions.
Article
Energy & Fuels
Qing Liu, Tamilselvan Pachiannan, Wenjun Zhong, N. Nallusamy, Yanzhi Zhang, Zilong Li, Yong Qian, Qian Wang, Zhixia He, Xingcai Lu
Summary: The Gasoline Compression Ignition (GCI) engine is an advanced combustion mode engine that achieves high thermal efficiency while meeting upcoming emission regulations. However, it faces difficulties in igniting and maintaining stable combustion at low loads. To address these issues, a new high reactive fuel called hydrogenated catalytic biodiesel is mixed with gasoline in various ratios and its combustion and emission parameters are studied. The experimental results show that stable combustion can be achieved at low loads using this fuel blend. Delaying the injection timing in the single injection mode results in lower nitrogen oxide emissions and nucleation mode number concentration emissions under low load conditions. The double injection mode controls the maximum pressure rise rate and cyclic variations within a controlled range. From the different test conditions, it is recommended to use a lower pilot injection ratio (20%) during advanced start of injection (-60 deg. CA aTDC) as it yields better combustion and emission results. Overall, the gasoline-hydrogenated catalytic biodiesel blend shows promise for GCI engines in tackling low load difficulties.
Article
Energy & Fuels
Jizhen Zhu, Dezhi Zhou, Liang Yu, Yong Qian, Xingcai Lu
Summary: This study aims to construct a high-fidelity simplified multi-component kinetic model for simulating the autoignition and oxidation processes of real diesel fuel. By using chemical lumping, skeletal reduction methods, and genetic algorithm optimization, a model that is in good agreement with experimental results can be obtained.
Article
Thermodynamics
Jizhen Zhu, Dezhi Zhou, Wenming Yang, Yong Qian, Yebing Mao, Xingcai Lu
Summary: This study explores the emission reduction potential of NH3/diesel dual-fuel combustion strategy in large marine engines using computational fluid dynamics modeling coupled with chemical kinetics. The results show that NH3 injection has an inhibiting effect on diesel autoignition and the dual-fuel combustion mode exhibits a two-stage heat release shape. The NOx emission decreases with increasing NH3 substitution ratio, while CO2 emission decreases monotonically with increasing NH3 substitution ratio. There is a trade-off relationship between NOx and N2O emissions, and optimizing injection timing can reduce unburned NH3 and N2O emissions.
Article
Energy & Fuels
Yong Qian, Yaoyuan Zhang, Shijie Mi, Haoqing Wu, Zilong Li, Xingcai Lu
Summary: This study investigates the combustion and emission characteristics of ICCI mode under low load conditions. By optimizing the fuel injection strategies and gasoline ratio, the engine efficiency can be significantly improved. Moreover, NOx and particulate emissions remain low under ICCI mode.
Article
Energy & Fuels
Yaoyuan Zhang, Haoqing Wu, Shijie Mi, Wenbin Zhao, Zhuoyao He, Yong Qian, Xingcai Lu
Summary: This study investigates the impact of different parameters on the control of intelligent charge compression ignition (ICCI) engines using Taguchi experimental design. The optimized control strategy achieved improved combustion efficiency and reduced emissions, with engine load and speed having a significant influence on the upper limit of efficiency, and excess air ratio, E85 energy ratio, and premixed strategies affecting emissions to varying degrees.
Article
Green & Sustainable Science & Technology
Wenbin Zhao, Haoqing Wu, Shijie Mi, Yaoyuan Zhang, Zhuoyao He, Yong Qian, Xingcai Lu
Summary: This paper investigates the control strategy of iso-butanol/biodiesel dual-fuel intelligent charge compression ignition (ICCI) mode for achieving high engine load extension. The results show that stable and controllable ICCI operation is obtained under high and ultra-high engine load. The use of different fuel injection strategies and exhaust gas recirculation results in efficient and clean combustion.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Energy & Fuels
Qiankun Zhang, Jin Xia, Jianping Wang, Zhuoyao He, Yong Qian, Xingcai Lu
Summary: The study aims to explore the spray and combustion characteristics of collision biodiesel and butanol under different collision angles, injection pressures, and ambient conditions. The results show that the spray in the horizontal direction has faster evaporation and diffusion rates compared to the vertical direction. Increasing the ambient temperature has a positive impact on promoting the horizontal diffusion of the vapor-phase spray. At larger collision angles, higher relative velocity leads to a more intense collision process and smaller diffusion rate after the collision. A smaller equivalence ratio after the collision leads to longer ignition delay and shorter flame lift-off length, contributing to a more intense combustion process and higher soot emissions. Increasing the injection pressure can improve the ignition and combustion characteristics, except at larger collision angles where the reduction in soot emissions is suppressed.
Article
Energy & Fuels
Yong Qian, Shijie Mi, Haoqing Wu, Yaoyuan Zhang, Zilong Li, Xingcai Lu
Summary: To improve the efficiency and reduce emissions, the intelligent charge compression ignition (ICCI) mode based on in-cylinder dual direct injection is proposed. The key challenge in expanding the load range of ICCI is to suppress rapid heat release during combustion under medium-high loads. This study applies double injection strategies of high-reactivity fuel to control the heat release progress. The results show that the double injection strategies of diesel improve indicated thermal efficiency (ITE), reduce in-cylinder maximum pressure, and lower NOx emissions.
Article
Engineering, Mechanical
Jianping Wang, Qiankun Zhang, Yaoyuan Zhang, Liang Yu, Dezhi Zhou, Xingcai Lu, Yong Qian
Summary: This study aims to explore the characteristics of spontaneous combustion and engine performance of kerosene in traditional compression ignition mode, providing a reference for optimizing kerosene compression ignition engines and advanced combustion mode. Ignition visualization tests of kerosene under marine and vehicle engine conditions were conducted, comparing the characteristics with diesel under 0.3 mm nozzle diameter. Then, the engine performance of both fuels under medium load and ultra-high injection pressures was compared. The results show that kerosene and diesel have similar ignition and combustion characteristics, indicating the universality of kerosene in diesel engine application. Kerosene has a longer ignition delay time, resulting in delayed combustion and heat release. Compared to diesel, kerosene has lower CO, particulate emissions, and indicated thermal efficiency, while higher HC and NOx emissions. The emission characteristics of kerosene RP-3 differ from previous studies, especially under ultra-high injection pressure. The combustion process and engine emissions of kerosene can be optimized with advanced combustion models and strategies.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Xinfeng Yan, Xiaoli Zhou, Ze Li, Yong Qian, Gehao Sheng
Summary: A fluid model was established by COMSOL to study the streamer discharge characteristics of different electrode shapes in C4F7N, and simulations were performed. The variation law of electric field intensity and photon flux with varying electrode shapes was analyzed, providing a theoretical basis for optical detection and reliable diagnosis of partial discharge. The simulation results showed that the electric field inhomogeneity and breakdown difficulty increased with the needle-plane model, rod-plane model, and ball-plane model, and the peak electric field intensity of the streamer head increased with the applied voltage but decreased with the electrode spacing. The change in photon flux was similar to the change in electric field intensity.
Article
Energy & Fuels
Shijie Mi, Haoqing Wu, Xinzhe Pei, Chunyu Liu, Liang Zheng, Wenbin Zhao, Yong Qian, Xingcai Lu
Summary: Ammonia as a hydrogen carrier and carbon-free fuel is receiving more attention for reducing carbon emissions in transportation. Ammonia-diesel dual-fuel combustion mode is a potential way to achieve lower carbon emissions in compression ignition engines. However, NH3 and N2O emissions are challenges to reducing greenhouse gas emissions in this combustion mode.
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.