Article
Energy & Fuels
Evans K. Quaye, Pan Jianfeng, Lu Qingbo, Yi Zhang, Wang Yu, Anthony Akurugo Alubokin
Summary: The study conducted a three-dimensional numerical and experimental investigation on methane-oxygen combustion in a small scale porous-media cylindrical combustor. The results indicate that porous media improves the thermal characteristics of the combustor, leading to more stable wall temperatures under certain conditions.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2021)
Article
Energy & Fuels
Qingguo Peng, Jiahao Ye, Yaojie Tu, Wenming Yang, Jiaqiang E, Zhuang Kang, Guang Fu
Summary: This study investigates the effects of premixed combustion and porous media setting on the flame stability and energy efficiency in micro combustion. Partially inserted porous media and larger combustor size promote combustion stability and broaden burning limits, while blending C3H8 inhibits these effects.
Article
Engineering, Environmental
Matias Fierro, Pablo Requena, Eugene Salgansky, Mario Toledo
Summary: Experimental investigation on a reverse flow porous medium reactor with different types of methane and oxidant flames for hydrogen and syngas production showed that separate supply of reactants allows for a higher H-2/CO ratio in the synthesis gas. Premixed flames exhibited good performance at phi = 2, while non-premixed flames achieved higher temperatures at phi = 2 and 3.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Alexander Kirdyashkin, Ramil Gabbasov, Vladimir Kitler, Anatoly Maznoy
Summary: The development of new energy-efficient high-temperature sintering furnaces is crucial for reducing the cost of refractory ceramic manufacturing. Experimental analysis was conducted on a furnace filled with a packed bed of ceramic spheres and utilizing premixed combustion of natural gas with air and oxygen. It was found that the filtration combustion mode is effective for sintering smaller parts, while the jet-stabilized combustion mode is more suitable for sintering larger pieces within the packed bed.
Article
Chemistry, Physical
Yunfei Yan, Chenghua Zhang, Gange Wu, Shuai Feng, Zhongqing Yang
Summary: This paper investigates the temperature distribution and exhaust species in a heat-recirculating micro-combustor embedded with porous media. The results indicate that embedding porous media improves temperature uniformity and preheating capacity. SiC material performs better in thermal stability and heat recirculating than Al(2)O(3) and ZrO2. The optimal equivalence ratio for methane/air combustion is in the range of 0.1-0.5, enabling super-enthalpy combustion.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Thermodynamics
Vadim N. Kurdyumov, Daniel Fernandez-Galisteo, Carmen Jimenez
Summary: This paper investigates super-adiabatic premixed flames in an inert porous medium layer of finite length. A one-step Arrhenius kinetics model is used to describe the combustion process with consideration of density variations. The asymptotic case of large thermal conductivity ratio and high activation energy limit is explored and compared to finite parameter values. The flame sheet model is employed to obtain analytical steady-state solutions for parametric analysis. The phenomenon of multiplicity of steady-state solutions is investigated, and the critical parameter values for multiple solutions are determined. The stability of the solutions is examined through time-dependent simulations.
COMBUSTION AND FLAME
(2022)
Article
Energy & Fuels
V. Bubnovich, H. Hernandez, M. Toledo, C. Flores
Summary: Experimental investigation was conducted on combustion characteristics and flame stabilization within a two-layer porous media burner. The combustion wave propagation rate was found to increase with increased inlet velocity and decreased equivalence ratio. A porous burner with flame stabilized between two porous ceramics was successfully built, showing complete combustion with low CO and NOx emissions.
Article
Energy & Fuels
Dingming Zheng, Lei Su, Haoyu Ou, Shijie Ruan
Summary: A 52 kW fully premixed stove with porous media was designed to improve combustion efficiency, achieving a thermal efficiency of 68.55% under rated power, with a radiant heat efficiency of 47.16%. Increasing pore density or reducing porosity of porous media can enhance ignition performance.
Article
Energy & Fuels
Zhe Wang, Changwei Ji, Du Wang, Ruifeng Hou, Tianyue Zhang, Shuofeng Wang
Summary: Adding dissociated ammonia can improve the combustion properties of NH3, but may slightly reduce combustion efficiency. Markstein length, heat release reactions, and NO formation are related to the dissociating degree under different conditions.
Article
Energy & Fuels
Bo Xie, Qingguo Peng, Zhiwei Shi, Jia Wei, Zhuang Kang, Depeng Wei, Xinghua Tian, Guang Fu
Summary: The primary obstacles to the development of micro-thermoelectric generators are the large heat loss ratio and flame instability. A study was conducted on the premixed H2/air combustion in a micro-planar combustor with porous media (PM) and CH4 blending to enhance the generator's working performance. The results showed that flame stability and burner radiation temperature were improved in PM due to heat recirculation and transmission.
Article
Thermodynamics
Xinjian Chen, Junwei Li, Dan Zhao, Muhammad Tahir Rashid, Xinyuan Zhou, Ningfei Wang
Summary: The experimental investigation in this work reveals that foamed porous media significantly enhance heat transfer efficiency in meso-scale burners, showing notable impacts on flame structure and temperature distribution.
Article
Physics, Multidisciplinary
Jingke Su, Anxiong Liu, Hualin Xiao, Kun Luo, Jianren Fan, Jean-Noel Jaubert
Summary: This article focuses on the generation of entropy in the combustion field and its significance in quantifying the interaction between turbulence and combustion. Through analyzing the entropy generation in thermal transport, mass transport, and chemical reactions, the study finds that thermal transport driven by temperature gradient plays a dominant role. The study also reveals that the responses of individual terms to combustion can be measured by the entropy.
Article
Thermodynamics
Emilie Yhuel, Guillaume Ribert, Pascale Domingo
Summary: Highly refined simulations of flame/shock interactions (FSI) are performed and analyzed in the context of hydrogen/air combustion in a two-dimensional shock-tube configuration. The study finds that thermal boundary conditions and species transport modeling have a weak impact during the first stages of the FSI, but a significant one once the reflected shock has crossed the flame front.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2023)
Article
Thermodynamics
Xinjian Chen, Junwei Li, Xu He, Dan Zhao, Ningfei Wang
Summary: This paper investigates the effects of ordered porous ceramics and pore size on the stability, thermal performance, and emission performance of meso-scale burners. The results show that ordered porous ceramics enhance heat transfer, reduce NOx emissions, and have potential applications in micro thermoelectric and thermophotovoltaic systems.
APPLIED THERMAL ENGINEERING
(2023)
Article
Chemistry, Physical
W. Yang, K. K. J. Ranga Dinesh, K. H. Luo, D. Thevenin
Summary: This study investigates the combustion characteristics of ammonia and ammonia-hydrogen fuel blends under engine-relevant conditions using direct numerical simulation and detailed chemistry. The results show that adding hydrogen to ammonia improves the reactivity of the flame and enhances the combustion process.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Mechanics
Shuai Dong, Dmitry Krasnov, Thomas Boeck
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2016)
Article
Multidisciplinary Sciences
Shuai Dong, Lishuai Liu, Xuemin Ye
Article
Thermodynamics
S. Dong, L. S. Liu, X. M. Ye
JOURNAL OF APPLIED FLUID MECHANICS
(2017)
Article
Mechanics
Shuai Dong, Dmitry Krasnov, Thomas Boeck
Article
Thermodynamics
Xuemin Ye, Xiangshan Zhang, Minglan Li, Chunxi Li, Shuai Dong
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2019)
Article
Mechanics
Shuai Dong, Pengfei Geng, Chunxi Li, Xuemin Ye, Zhengren Wu
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2019)
Article
Mechanics
S. Dong, D. Krasnov, T. Boeck
MAGNETOHYDRODYNAMICS
(2015)
Article
Mechanics
S. Dong, D. Krasnov, B. W. Li, T. Boeck
MAGNETOHYDRODYNAMICS
(2012)
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.