Article
Energy & Fuels
A. V. Minakov, V. A. Kuznetsov, I. S. Anufriev, E. P. Kopyev
Summary: This study numerically investigates the combustion of diesel fuel in a pre-chamber vortex burner with a steam blast atomizer. The results show that the burner can achieve almost complete combustion while meeting environmental emission standards.
Article
Energy & Fuels
A. V. Minakov, I. S. Anufriev, V. A. Kuznetsov, A. A. Dekterev, E. P. Kopyev, O. V. Sharypov
Summary: This study investigated experimentally and numerically the combustion of n-heptane in a laboratory evaporative-type burner, showing a significant difference in combustion characteristics between steam and air supply, with steam supply significantly reducing nitrogen oxides and soot emissions.
Article
Energy & Fuels
Jiyun Ren, Kaixuan Yang, Yuhang Li, Yang Bai, Jiahao Jiang, Xiaole Huang, Lei Deng, Defu Che
Summary: This study investigates the effect of alkali and alkaline earth metals (AAEMs) on the catalytic gasification of large particle-size biomass. The results show that the content of AAEMs increases along the radial direction and end surface, and the collapse of large pores and generation of micropores are observed after gasification. The presence of AAEMs affects the composition and calorific value of the gasification products.
Article
Chemistry, Multidisciplinary
Kirill Larionov, Albert Kaltaev, Konstantin Slyusarsky, Dmitriy Gvozdyakov, Andrey Zenkov, Maria Kirgina, Ilya Bogdanov, Vladimir Gubin
Summary: Experimental studies were conducted on the steam pyrolysis of oil sludge using a flowtype pilot plant. Valuable energy products including liquid hydrocarbons, semi-coke, non-condensable gas-phase compounds, and bitumen were obtained. The physicochemical characteristics, atomization process, droplet ignition, and combustion of the liquid hydrocarbons were comprehensively studied. This study is of great importance for the design of new installations and technological systems for hydrocarbon pyrolysis.
APPLIED SCIENCES-BASEL
(2022)
Article
Energy & Fuels
Shirish Kumar Sharma, Anand M. Shivapuji, S. Dasappa
Summary: This study focuses on char gasification in steam for generating syngas in a two-stage gasification technology for high-ash coal. Controlled experiments were conducted to investigate the dependence of char reactivity on temperature, gas composition, flow rate, and carbon conversion rate. The results showed that small particles have higher reactivity compared to bigger particles, making them suitable for pilot-scale operations. Pilot-scale experiments were also carried out in an oxy-steam environment, and the results were compared to simulated experiments for small particles. The addition of oxygen with steam improved the reactivity of char gasification, but led to a decrease in the calorific value of the gas.
Article
Thermodynamics
K. Nicolas Ripoll, Eugene Salgansky, T. Mario Toledo
Summary: Numerical simulations and experimental results showed that increasing coal content favored a normal thermal structure, while increasing steam content led to a shift from normal to inverse thermal structure. The presence of steam significantly affected the temperature and concentration of gaseous products of the combustion wave.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Energy & Fuels
Yi Xiao, Ruihua Zhao, Juan Chen
Summary: This study investigated the migration of phosphorus during the co-combustion of wet sewage sludge and various coals. The results showed that phosphorus was more easily fixed in ash as apatite at higher temperatures. Different coal compositions had varying abilities to capture phosphorus, and steam generally had a negative impact on phosphorus capture.
Article
Multidisciplinary Sciences
Shuai Zhao, Jianzheng Su, Junwen Wu
Summary: This paper explores the influence of temperature, pressure, and time on the evolution of pore structure and release characteristics of oil shale. The results show that under high-pressure nitrogen injection conditions, the effective oil recovery of oil shale pyrolysis increases with the extension of temperature and pyrolysis time. The release process of volatile products is inhibited under high pressure, and the average pore size and specific surface area are reduced due to the coking reaction and collapse of the plastic structure of kerogen.
SCIENTIFIC REPORTS
(2023)
Article
Thermodynamics
I. S. Anufriev, E. P. Kopyev, M. A. Mukhina, I. S. Sadkin
Summary: This study experimentally investigates the thermal and environmental performance of n-heptane combustion sprayed by superheated steam and heated air in a laboratory atmospheric burner, and compares the results with diesel fuel. The findings show that when n-heptane is atomized by a steam jet, it exhibits typical features of combustion of liquid hydrocarbons with steam supply, resulting in high completeness of fuel combustion and reduced emissions of nitrogen oxides and carbon monoxide.
JOURNAL OF ENGINEERING THERMOPHYSICS
(2022)
Article
Energy & Fuels
Yunji Pang, Chen Yang, Yuting Wu, Yisheng Chen, Huan Li
Summary: This study explores a method for steam gasification of biomass, and enhances the efficiency of biochar fixed bed gasification by adding catalysts. Experimental results show that adding CaO in counter-flow gasification can improve gasification intensity, while the addition of Fe2O3 can increase hydrogen production yield.
Article
Energy & Fuels
Andrey V. Minakov, Viktor A. Kuznetsov, Artem A. Dekterev, Igor S. Anufriev, Evgeny P. Kopyev, Sergey V. Alekseenko
Summary: Currently, thermal power plants are one of the main sources of electricity, but the combustion of fossil fuels produces harmful emissions. Injecting steam into the combustion chamber is an effective method to suppress these emissions. The influence of various mathematical submodels on the accuracy of the numerical simulation of fuel combustion was studied, and the best submodels were determined through comparison with experimental data. Using the EDC model with a mechanism consisting of 60 components and 305 elementary reactions resulted in the highest agreement with experimental data.
Article
Environmental Sciences
K. B. Larionov, K. Slyusarskiy, M. Kirgina, D. Gvozdyakov, I. A. Bogdanov, A. Zenkov, S. A. Yankovsky, V. E. Gubin
Summary: The technical characteristics and combustion process of liquid hydrocarbons obtained by steam pyrolysis of used automobile tires were studied, and compared to traditional liquid fuel oil. The liquid hydrocarbons showed low pour point, comparable calorific value, shorter ignition delay time, and burning time. The combustion process of these liquid hydrocarbons was found to be superior to traditional liquid fuel.
WASTE AND BIOMASS VALORIZATION
(2022)
Article
Energy & Fuels
Zhenghong Zhao, Zewu Zhang, Fan Wu, Yuxiao Chen, Cong Luo, Xiaoshan Li, Ge Gao, Liqi Zhang, Chuguang Zheng
Summary: This study investigates the impact of steam addition on turbulent mixing and chemical reaction in pulverized coal MILD-oxy combustion. The results show that steam affects flame temperature, weakens internal flue gas recirculation, and transitions the combustion towards turbulent mixing control. With increasing steam concentration, chemical reactions shift towards diffusion-controlled regime.
Article
Energy & Fuels
Shuai Yan, Xuan Qu, Zihong Xia, Caixia Chen, Jicheng Bi
Summary: The experimental results demonstrate that calcium as an additive has a promoting effect on cobalt, and temperature and hydrogen pressure have significant impacts on the formation of products in the catalytic hydrogasification process. A two-stage reactor scheme was proposed, successfully achieving staged hydrogenation of coal.
Article
Energy & Fuels
Wei Shi, Weijuan Yang, Longjin Du, Jianzhong Liu, Junhu Zhou
Summary: This study experimentally investigated the hydrogen generation performance of a mixture of aluminum powder and sodium borohydride in a steam atmosphere. The results showed that sodium borohydride significantly improved the efficiency of hydrogen generation from aluminum powder with steam, reducing the start-off temperature and forming new products NaAl23O35 and Al5O6(BO3).
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2021)
Article
Energy & Fuels
I. S. Anufriev, S. V. Alekseenko, O. V. Sharypov, E. P. Kopyev
Article
Thermodynamics
S. Alekseenko, I. S. Anufriev, A. A. Dekterev, E. Yu Shadrin, V. A. Kuznetsov, O. Sharypov, E. E. Boyko, I. Naumov, I. K. Kabardin
Summary: This study investigates the swirling flow structure in a laboratory model of a promising pulverized-coal boiler with a four-vortex combustion circuit using experimental and numerical methods. The results show that a stable four-vortex flow structure is crucial for effective cleaning of the boiler's heat-exchange surfaces. Numerical calculations using the AnsysFluent CFD package were in good agreement with experimental data, validating the mathematical model for future simulations of coal combustion processes.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Energy & Fuels
I. S. Anufriev, E. P. Kopyev, I. S. Sadkin, M. A. Mukhina
Summary: A new low-power burner has been developed and tested, capable of burning low NOx liquid combustible waste. The burner design significantly reduces nitrogen oxides emissions and has been tested with diesel and waste oil combustion performance.
Article
Energy & Fuels
A. V. Minakov, I. S. Anufriev, V. A. Kuznetsov, A. A. Dekterev, E. P. Kopyev, O. V. Sharypov
Summary: This study investigated experimentally and numerically the combustion of n-heptane in a laboratory evaporative-type burner, showing a significant difference in combustion characteristics between steam and air supply, with steam supply significantly reducing nitrogen oxides and soot emissions.
Article
Thermodynamics
I. S. Anufriev, E. P. Kopyev, S. Alekseenko, O. Sharypov, M. S. Vigriyanov
Summary: This paper explores a new environmentally friendly method of burning liquid fuel by injecting superheated steam, and introduces a new burner designed for this purpose. The study shows that the burner has high combustion efficiency and low emissions, and successful experimental tests were conducted on a low-power boiler plant.
Article
Thermodynamics
I. S. Anufriev, E. P. Kopyev, M. A. Mukhina, I. S. Sadkin
Summary: This study experimentally investigates the thermal and environmental performance of n-heptane combustion sprayed by superheated steam and heated air in a laboratory atmospheric burner, and compares the results with diesel fuel. The findings show that when n-heptane is atomized by a steam jet, it exhibits typical features of combustion of liquid hydrocarbons with steam supply, resulting in high completeness of fuel combustion and reduced emissions of nitrogen oxides and carbon monoxide.
JOURNAL OF ENGINEERING THERMOPHYSICS
(2022)
Article
Thermodynamics
E. P. Kopyev, I. S. Anufriev, I. S. Sadkin, E. Yu. Shadrin, A. V. Minakov
Summary: This study investigated the effects of injecting superheated steam into the combustion zone during kerosene combustion. Experimental data showed that injecting steam resulted in a significant reduction in toxic emissions, with up to 70% reduction in CO and up to 95% reduction in NOx. Comparisons were made between kerosene combustion with steam and heated air. The proposed method of combustion with steam demonstrated advantages, achieving minimal emissions of CO (0.11 g/kg) and NOx (0.89 g/kg) while maintaining high combustion efficiency. These findings are important for the design of low-emission combustion chambers.
JOURNAL OF ENGINEERING THERMOPHYSICS
(2022)
Proceedings Paper
Thermodynamics
E. Yu Shadrin, I. S. Anufriev, E. P. Kopyev, L. Maltsev, O. Sharypov
XXXVI SIBERIAN THERMOPHYSICAL SEMINAR (STS 36)
(2020)
Article
Thermodynamics
I. S. Anufriev, E. Yu. Shadrin, E. P. Kopy'ev, L. I. Maltsev, I. S. Sadkin, O. V. Sharypov
JOURNAL OF ENGINEERING THERMOPHYSICS
(2020)
Article
Mechanics
E. Yu Shadrin, I. S. Anufriev, O. Sharypov
JOURNAL OF APPLIED MECHANICS AND TECHNICAL PHYSICS
(2020)
Article
Engineering, Aerospace
I. S. Anufriev, E. Yu Shadrin, E. P. Kopyev, O. Sharypov, V. V. Leschevich
THERMOPHYSICS AND AEROMECHANICS
(2020)
Article
Mechanics
S. Alekseenko, I. S. Anufriev, M. S. Vigriyanov, E. P. Kopyev, I. S. Sadkin, O. Sharypov
JOURNAL OF APPLIED MECHANICS AND TECHNICAL PHYSICS
(2020)
