Article
Energy & Fuels
Yong Cao, Bin Li, Lifeng Xie, Xuhai Pan
Summary: This paper presents experiments and numerical simulation on vented methane-air explosions, investigating the influence of methane concentration and vent burst pressure on internal pressure, temperature, and fuel concentration.
Article
Chemistry, Physical
Yueying Liang, Yuxiang Zhu, Jintao Chen, Xingcai Lu, Chong-Wen Zhou
Summary: Theoretical investigations were conducted to study the kinetics of decomposition and isomerization reactions for five types of branched pentanol radicals. The geometries of all reactants, transition states, and products were optimized at the M06-2X/6-311++G(d,p) level of theory. The pressure- and temperature-dependent rate coefficients for all channels were calculated using the RRKM/master equation in the pressure range of 0.01-100 atm over 250-2000 K. Most of the pentanol radical isomers tend to isomerize to alkoxy radicals at low temperatures, producing ketones or aldehydes, while at higher temperatures, & beta;-scission reactions are the main reaction channels for the consumption of pentanol radicals.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Engineering, Chemical
Shuangming Wei, Minggao Yu, Rizhong Bao, Bei Pei, Shuo Chen
Summary: The study investigated the explosion characteristics of syngas/air mixtures at sub-atmospheric pressures with different equivalence ratios and fuel compositions, indicating the sensitivity of explosion parameters to initial pressure depends on equivalence ratios and fuel compositions.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2022)
Article
Chemistry, Physical
Yu Chen, Yu Lv
Summary: This study focuses on cryogenic hydrogen combustion in subcritical pressure conditions and its practical relevance to rocket engine applications. A cryogenic two-phase flame is analyzed under the consideration of real-fluid effects and heat/mass transfer across the liquid-gas interface. The effects of pressure, strain rate, fuel inlet temperature, and heat loss on flame characteristics are examined.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Nuclear Science & Technology
Yong Cao, Ziyang Wang, Mingyu Zeng, Jianpeng Chen, Bin Li, Lifeng Xie
Summary: This study examines the vented explosion of hydrogen-air mixture through experimental and numerical simulation approaches, and investigates the dynamics of flame propagation and flame/vortex interaction. The findings provide valuable insights into the mechanisms of external explosion and the influence of vent burst pressure.
NUCLEAR ENGINEERING AND DESIGN
(2022)
Article
Thermodynamics
Fatma Cansu Yuecel, Fabian Habicht, Florian Arnold, Rudibert King, Myles Bohon, Christian Oliver Paschereit
Summary: The concept of shockless explosion combustion (SEC) aims to achieve pressure gain combustion through multiple, distributed autoignitions occurring simultaneously. An injection strategy is proposed to control the local equivalence ratio throughout the combustor, and an extremum seeking control algorithm successfully optimizes the formation of different autoignition modes.
COMBUSTION AND FLAME
(2021)
Article
Engineering, Environmental
Mingrui Yang, Haipeng Jiang, Xiangfeng Chen, Wei Gao
Summary: Experiments were conducted to study the venting of aluminum dust explosions, obtaining new fitting formulas for flame length and width which are important references for venting safety area design considering various factors. Results showed that external pressure attenuates inversely proportional to distance, contradicting the standard recommendation.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Environmental
Shengchao Rui, Quan Li, Jin Guo, Xuxu Sun
Summary: This study experimentally investigated the effect of low vent burst pressure on methane-air deflagrations in a rectangular vessel, observing four different overpressure peaks and monitoring flame behaviors at each peak. The results showed that vent burst pressure affects P-open and P-acc, while P-out and P-ext are independent of vent burst pressure. Double flame accelerations were observed due to vent rupture and flame venting. Predictions reasonably agreed with experimental data, with discrepancies decreasing as vent burst pressure increased. Predicted maximum peak overpressure and external flame length were slightly larger than experimental values, providing better guidance for safe design and risk assessment in explosion venting.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Energy & Fuels
Feng Wu, Xuhai Pan, He Wang, Min Hua, Hao Yu, Xiaowei Zang, Juncheng Jiang
Summary: Under negative pressure, the risk of methanol spray explosion increases. Experimental studies have shown that different injection pressures, concentrations, and initial temperatures affect the explosion characteristics of methanol spray, with higher temperatures and lower concentrations promoting smaller particle sizes and increased explosion risks.
Article
Chemistry, Physical
Peilin Liu, Lijia Zhong, Lei Zhou, Haiqiao Wei
Summary: This paper investigates the combustion characteristics of premixed CH4-air and H2-air mixtures with different excess air coefficients ignited by hot jet or jet flame in a constant volume combustion chamber. Results show that orifice size has diverse influences on turbulent jet ignition of methane and hydrogen, and shock waves and pressure oscillations were observed in hydrogen jets experiments. Additionally, re-ignition location and ignition mode transition of hydrogen jets in lean cases are discussed.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Weihua Zhao, Junhao Yan, Suya Gao, Timothy H. Lee, Xiangrong Li
Summary: The study highlights the importance of researching the performance and emission characteristics of diesel engines fueled with diesel/alcohol blends under high-altitude conditions. The results show that diesel/alcohol blends can extend the operating range of diesel engines at high altitudes, with higher NOx emissions but reduced soot emissions compared to pure diesel.
Article
Energy & Fuels
Xi Wang, Ligang Zheng, Jian Wang, Rongkun Pan, Wen Yang, Hongwang Jin, Yuanpeng Fu
Summary: Mixing biogas with other fuels or increasing the oxygen content in the oxidizer can enhance the combustion performance of biogas flames. Oxygen enrichment increases flame propagation velocity and explosion pressure, while propane addition decreases maximum flame velocity. Laminar burning velocity (LBV) is a crucial parameter for predicting maximum flame velocity and maximum rate of pressure rise values.
Article
Engineering, Multidisciplinary
Xing-Liang Wu, Sen Xu, Ai-Min Pang, Wei-Guo Cao, Da-Bin Liu, Xin-Yu Zhu, Fei-Yang Xu, Xu Wang
Summary: Through experiments, it was found that MgH2 had higher reaction activity and rate compared to TiH2 and ZrH2, with a higher gas production rate. As thermal stability increased, ignition energy gradually rose, and the combustion ratio and calorific value were in line with the explosion test results.
DEFENCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Feng Wu, Hao Yu, Xuhai Pan, Xiaowei Zang, Min Hua, He Wang, Juncheng Jiang
Summary: This study investigates the explosion characteristics of methanol spray under negative pressure. It is found that the decrease of methanol concentration, the increase of ambient temperature, and injection pressure promote the breakage of methanol spray. Increasing spray concentration contributes to the spray explosion, but when the concentration exceeds a certain range, the explosion pressure decreases due to poor oxygen. The increase of ambient temperature has a significant promoting effect on spray explosion, especially under negative pressure conditions.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Chemistry, Multidisciplinary
Fang-Fang Xie, Zuo-Chang Chen, You-Hui Wu, Han-Rui Tian, Shun-Liu Deng, Su-Yuan Xie, Lan-Sun Zheng
Summary: This study presents a method to synthesize and investigate the C71H2 isomers in situ during low-pressure combustion. The structures, relative energies, and stability of these isomers are characterized using techniques such as X-ray diffraction and UV-Vis absorption spectroscopy. These findings contribute to the understanding of carbene additions to fullerenes and other carbon clusters at high temperatures.
Article
Thermodynamics
Hao Xia, Wang Han, Xutao Wei, Meng Zhang, Jinhua Wang, Zuohua Huang, Christian Hasse
Summary: This study investigates the flashback phenomenon of hydrogen-enriched flames under different thermal boundary conditions. The results show that the characteristics of flashback are closely related to the boundary condition. Flashback can be led by either a large-scale swirling flame tongue (Mode I) or multiple small-scale flame bulges (Mode II), and the presence of these structures affects the speed of flashback. These findings have important implications for extending the flashback limit of hydrogen-enriched fuels.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2023)
Article
Chemistry, Physical
Van Ga Bui, Thi Minh Tu Bui, Van Nam Tran, Zuohua Huang, Anh Tuan Hoang, Wieslaw Tarelko, Van Hung Bui, Xuan Mai Pham, Phuoc Quy Phong Nguyen
Summary: This paper presents the research results on the optimal fuel compositions and control parameters of a spark ignition engine fueled with syngas-biogas-hydrogen. The optimal content of hydrogen and biogas in the mixture is found to be 20% and 30% respectively. The advanced ignition angle differs between the hydrogen-syngas blend and the syngas-biogas blend, with the former having a lower angle. The engine's power decreases when switching from hydrogen or biogas fueling mode to syngas fueling mode, and there is a significant increase in NOx emissions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Guohua Li, Zhenrong Zhang, Jingfeng Ye, Sheng Wang, Jun Shao, Haolong Wu, Yamin Wang, Zhiyun Hu, Jinhua Wang, Zuohua Huang
Summary: In order to address the uncertainty in the calibration process of two-color plane laser-induced fluorescence (PLIF) temperature measurement, a new calibration method is proposed, taking into account the influence of fluorescence yield. The calibration process is carried out at high and low temperature regions to restrain the bias originating from quenching. This new calibration method is validated in a jet flame with a temperature range of 1300-1800 K, and the results demonstrate its effectiveness in the combustion field, especially with a large temperature range and strong quenching coefficient.
APPLIED SCIENCES-BASEL
(2023)
Article
Energy & Fuels
Wenlin Huang, Honghuan Wu, Wuchuan Sun, Congjie Hong, Zemin Tian, Yingwen Yan, Zuohua Huang, Yingjia Zhang
Summary: The pre-ignition behavior of dimethyl ether (DME) was investigated through shock tube experiments and theoretical analysis. It was found that pre-ignition is prone to occur in the transition region from high temperature to intermediate temperature, and the decrease in pressure and equivalency ratio aggravates the pre-ignition behavior. Temperature sensitivity and Sankaran number were identified as the best criteria for predicting pre-ignition of negative temperature coefficient (NTC) fuels.
Article
Energy & Fuels
Lihan Fei, Mengxiao Qin, Zuohua Huang, Chenglong Tang
Summary: The hypergolic ignition behaviors of three ionic liquids [BMIm]-[DCA], [EMIm][DCA], and [EMIm][CDB] reacting with white fuming nitric acid (WFNA) were investigated. Two distinct hypergolic ignition modes were observed, with vapor smoke and sudden ejection of liquids induced by microexplosion for [BMIm][DCA] and [EMIm][DCA] and monotonic increase in temperature before ignition for [EMIm][CDB]. The time scales of vapor delay, explosion delay, and ignition delay decreased with the increase of droplet impact velocity.
Article
Energy & Fuels
Geyuan Yin, Bo Xiao, Hao Zhao, Haochen Zhan, Erjiang Hu, Zuohua Huang
Summary: An experiment was conducted to investigate the chemical kinetic effect of dimethyl ether (DME) on ammonia combustion and NO formation in a jet-stirred reactor. The mole fractions of reactants and intermediates were measured under various conditions. The key reactions were identified through pathway and sensitivity analysis. The results showed that NH2 and HO2 played important roles in ammonia oxidation, while reactions like CH3 + NO2 = CH3O + NO and HNO + O2 = NO + HO2 were essential for NO formation.
Article
Chemistry, Multidisciplinary
Ahmed Yasiry, Jinhua Wang, Longkai Zhang, Hongchao Dai, Ahmed A. A. Abdulraheem, Haroun A. K. Shahad, Zuohua Huang
Summary: The study aims to explore the potential of using ammonia as a replacement for natural gas, while making only minor adjustments to equipment and processes. The research investigates the burning velocity of binary blends, such as ammonia-methane and ammonia-hydrogen, and the effect of different hydrogen blending ratios on tertiary fuels. The results show that increasing the hydrogen fraction increases the burning velocity for all mixtures, while the blending of ammonia with methane also increases the burning velocity.
APPLIED SCIENCES-BASEL
(2023)
Article
Thermodynamics
Rongyuan Ju, Jinhua Wang, Meng Zhang, Haibao Mu, Yun Wu, Guanjun Zhang, Zuohua Huang
Summary: This study investigates the impact of dielectric barrier discharge (DBD) plasma on premixed laminar and swirl NH3/H2 flames. The results show that DBD plasma can reduce flame height and increase burning velocity. It also alters the structure of swirl flames but has minimal effect on lean blow-off limits. Furthermore, DBD plasma leads to increased NOx emissions for both premixed laminar and swirl NH3/H2 flames.
APPLICATIONS IN ENERGY AND COMBUSTION SCIENCE
(2023)
Article
Thermodynamics
Meng Zhang, Wanying Xu, Ruixiang Wang, Xutao Wei, Jinhua Wang, Zuohua Huang, Houzhang Tan
Summary: This study investigates the effect of wall heat loss on NOx emission by designing air film cooling on the swirling combustion chamber. The flame structure and NO production were measured using OH-/NO-PLIF techniques, and NOx emission was analyzed using a Gasmet DX40 0 0 FTIR gas analyzer. Large eddy simulation with detailed chemistry was also conducted to further understand the experimental findings. The results show that wall heat loss decreases NOx emission but increases N2O emission.
COMBUSTION AND FLAME
(2023)
Article
Thermodynamics
Weijie Zhang, Wang Han, Jinhua Wang, Zuohua Huang, Wu Jin, Jeroen van Oijen
Summary: This study models the Darmstadt multi-regime turbulent flame MRB26b using the Flamelet-Generated Manifold (FGM) in the context of Large Eddy Simulation (LES). Different databases are used to build premixed, non-premixed, and partially premixed chemical databases, and the LES-FGM results are compared with experimental data using two sub-filter closure models. The results show that the databases lead to similar modelling of major species but better predict intermediate minor species using counter-flow flame databases. The study also reveals the over-prediction of minor species using the DTF model and proposes a correction method for improvement.
COMBUSTION AND FLAME
(2023)
Article
Chemistry, Applied
Geyuan Yin, Bo Xiao, Jiajun You, Haochen Zhan, Erjiang Hu, Zuohua Huang
Summary: The laminar flame speeds of ammonia/propane in air were investigated over a range of conditions. The M-NUIG model successfully predicted the measured data of propane, ammonia, and mixtures. The addition of propane and nitrogen compounds can significantly affect the formation of harmful emissions and increase the flame speed.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Thermodynamics
Meng Yang, Jack J. Yoh, Chenglong Tang, Zuohua Huang
Summary: Electrically controlled solid propellant (ECSP) is a potential propellant that can achieve multiple ignitions and extinguishments by controlling electric power supply. In this study, ECSP samples were prepared using lithium perchlorate (LiClO4, LP) as the oxidant and tungsten as a metal additive. Various analytical techniques were used to investigate the thermal analysis characteristics of ECSP and the effect of tungsten sizes on the reaction process and mechanism. The results showed that heat release and effective activation energy (E & alpha;) increased with increasing tungsten size.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Wanying Xu, Meng Zhang, Yifeng Zhang, Jinhua Wang, Zuohua Huang
Summary: This study investigates the effects of temperature and composition stratification strategies on the auto-ignition characteristics of NH3/H2/air mixtures in HCCI engines. The results show that temperature stratification can reduce the peak heat release rate, advance the ignition time, and extend the combustion duration, while composition stratification has limited effect on the overall combustion process.
APPLICATIONS IN ENERGY AND COMBUSTION SCIENCE
(2023)
Article
Energy & Fuels
Ruihan Ge, Erjiang Hu, Xiaoxin Yao, Chenglong Tang, Zuohua Huang
Summary: This experimental study investigates the effects of ignition timings, injection pressures, and hydrogen enrichment on ethanol stratified ultra-lean combustion. The results show that the addition of hydrogen increases the stable ignition limit and improves combustion characteristics. However, delayed ignition timings and high injection pressures may result in incomplete combustion.
Article
Thermodynamics
Longjuan Ji, Jinhua Wang, Weijie Zhang, Deli Li, Guangya Hu, Zuohua Huang
Summary: The nonlinear behavior of thermoacoustic oscillation for premixed swirl flames fueled with CH4/air mixtures is experimentally studied. The study reveals the effects of changing equivalence ratio phi, combustor inlet bulk velocity Uin, and swirl number S on the flame modes and oscillations. The study also shows the relationship between the appearance of flame in the outer circulation zone and the occurrence of quasi-periodic and limit cycle oscillations. Furthermore, the study finds that the lean/rich blow-off limits and oscillation range are extended with a larger S, while the stable combustion regime is wider with a smaller S.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
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.