Article
Energy & Fuels
Yuhua Liu, Jingzhang Liu, Qinggang Lyu, Jianguo Zhu, Fei Pan
Summary: In this study, the microstructure changes of fuel during preheating process were analyzed to reveal the impact on particle change behavior during combustion. It was found that during preheating, the main forms of N, C, and O elements in coal were pyrrole, hydrocarbon, and carbon-oxygen single bond respectively.
Article
Thermodynamics
Ali Cemal Benim, Cansu Deniz Canal, Yakup Erhan Boke
Summary: Computational investigation of swirling pulverized coal and biomass flames for oxy-combustion reveals that the Reynolds Stress Model (RSM) captures unsteady dynamics better than the k-epsilon model. Predicted velocities show better agreement with measurements using RSM. However, both models underestimate the measurements, with discrepancies quantified in peak values of axial velocity. Biomass flame is predicted to be nearly twice as long as coal flame.
Article
Thermodynamics
Marek Pronobis, Robert Wejkowski, Sylwester Kalisz, Szymon Ciukaj
Summary: The aim of this work is to analyze the feasibility of converting a pulverized coal boiler to 100% biomass combustion using torrefied PKS. By replacing hard coal with torrefied biomass, CO2 emissions can be practically eliminated, and the problem of coal shortages in Europe can be reduced. However, there are challenges to address such as boiler fouling, grinding new fuel, changing NOx emissions, and exhaust gas dew point. Measurements and calculations were conducted to assess the risks of slagging and fouling and to evaluate the potential use of Dunino halloysite for protection against corrosion. The results show that the combustion of PKS leads to higher flue gas temperatures compared to coal combustion.
Article
Green & Sustainable Science & Technology
Sujeet Yadav, S. S. Mondal
Summary: A detailed investigation was conducted on an oxy-fuel combustion-based CCS system, analyzing the operational characteristics and performance compared to conventional air-fired combustion. It was found that the oxy-coal combustion power plant showed excellent ability to capture carbon dioxide with high purity and recovery rate, albeit with a slight decrease in net efficiency compared to conventional power plants.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
Article
Energy & Fuels
Sheng Qi, Zhihua Wang, Mario Costa, Yong He, Kefa Cen
Summary: The ignition and combustion characteristics of biomass and lignite particles were found to be homogeneous, while bituminous coal and anthracite particles ignited heterogeneously. Biomass particles ignited earlier than coal particles and the ignition delay time decreased with increasing volatile content in coal. Replacing N2 with CO2 delayed the ignition of all solid fuels and extended the burnout time of volatiles, leading to less intense combustion in a CO2/O2 environment compared to N2/O2 due to lower binary diffusivity of O2 in CO2 and higher volumetric heat capacity of CO2.
Article
Environmental Sciences
Viktor Alexandrovich Kuznetsov, Daria Mikhailovna Bozheeva, Andrey Viktorovich Minakov
Summary: Combustion or gasification of coal in a nitrogen-free environment is a promising technology for reducing the carbon footprint. This study numerically investigates the oxy-gasification processes of pulverized coal in a CO2-H2O-O-2 environment and examines the influence of various factors on the physicochemical processes and syngas composition. The results show that increasing oxygen concentration in the blast can stabilize ignition and combustion of coal, while decreasing the excess oxygen ratio leads to increased combustible losses in the gasifier.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Applied
Qianyun Chen, Dingyi Qin, Jing Li, Zhaohui Liu
Summary: A particle-tracking image pyrometer system was proposed to investigate the ignition characteristics of pulverized coal particles, providing reliable simultaneous measurements of velocity, diameter, and temperature of individual burning particles. Experimental validation was conducted under specific conditions to accurately measure the combustion state and time parameters of the particles.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Applied
Ping Chen, Boyu Jiang, Chen Gong, Mingyan Gu, Kun Luo, Jianren Fan, Yi Wang
Summary: This study investigates the effects of ammonia mixing on NO formation characteristics during pulverized coal combustion. The results show that the addition of ammonia promotes NO production, but separation combustion can effectively reduce NO generation compared to coupled combustion.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Energy & Fuels
Ruidan Gao, Shangyi Yin, Tao Song, Ping Lu
Summary: A 3D Eulerian-Lagrangian model using the MP-PIC method is developed to study the co-combustion of pulverized coal and biomass in a TTF precalciner. The findings show the formation of three spraying effects and five recirculation zones near the raw meal inlet in the precalciner. The highest temperature in the main combustion zone can reach 1600 K, and the decomposition rate of raw meal can reach 93.9% without biomass input. Furthermore, as the biomass blending ratio increases, the average temperature, decomposition rate of raw meal, and NOx emissions in the precalciner decrease.
Article
Green & Sustainable Science & Technology
Ke Ren, Tianzuo Zhang, Xianfeng Tan, Yijie Zhai, Yueyang Bai, Xiaoxu Shen, Yuke Jia, Jinglan Hong
Summary: This study analyzed the environmental performance of mainstream ammonia synthesis in China using the LCA method, and found that the pulverized coal entrained flow gasification technology showed superiority in reducing the environmental burden, especially in categories such as global warming, freshwater ecotoxicity, and water depletion.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Thermodynamics
Junjun Guo, Xudong Jiang, Hong G. Im, Zhaohui Liu
Summary: In this study, the contributions of gas, soot, and coal particles to total radiation in pulverized coal combustion were examined. The results showed good agreement between the predicted distributions of coal particles, tar, and soot and experimental data. Accurate prediction of radiation heat transfer in pulverized coal combustion requires considering all components.
COMBUSTION AND FLAME
(2022)
Article
Energy & Fuels
Yuegui Zhou, Tingyao Zhang, Bofei Zhou
Summary: MILD oxy-coal combustion technology is a promising technology for CO2 capture and storage. The effect of primary oxidizer stream jet velocities on coal ignition and combustion characteristics was investigated experimentally. The results showed that increasing jet velocity can offset the delayed effect of CO2 on coal ignition and increase the temperature of coal particles.
Article
Thermodynamics
Hendrik Nicolai, Tao Li, Christopher Geschwindner, Francesca di Mare, Christian Hasse, Benjamin Boehm, Johannes Janicka
Summary: This study numerically investigates the ignition and combustion of coal particle groups in a laminar flow reactor. Higher particle densities are found to significantly increase ignition delay, while the shape of the flame is strongly influenced by particle number density.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Energy & Fuels
Zhenghong Zhao, Zewu Zhang, Xiaojian Zha, Ge Gao, Xiaoshan Li, Fan Wu, Cong Luo, Liqi Zhang
Summary: This study evaluates the feasibility of direct steam injection for forming an H2O-rich environment in MILD oxy combustion. The results show that inner-steam injection is better in controlling temperature rise and fluctuation, and maintaining MILD combustion. Inner-steam injection also inhibits fuel-N oxidation and enhances NO-reburning, leading to lower NO emission concentration.
Article
Energy & Fuels
Fangqi Liu, Jingying Xu, Congming Yu, Jianqun Wu, Jingkun Han, Dunxi Yu
Summary: The novel compound additive prepared from kaolin and limestone shows promising prospects for reducing the emission of PM2.5. The addition of kaolin or limestone alone can reduce the aerosol emissions in the size range of 0.3-2.5 μm but increase the emissions of ultrafine aerosols less than 0.3 μm. However, the addition of the kaolin-limestone additive leads to a significant reduction in both PM0.3 and PM0.3-2.5, resulting in a high reduction of PM2.5.
Article
Energy & Fuels
Marshall Wise, James Dooley, Patrick Luckow, Katherine Calvin, Page Kyle
Article
Green & Sustainable Science & Technology
James J. Dooley, Robert T. Dahowski, Casie L. Davidson
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2009)
Article
Green & Sustainable Science & Technology
Elizabeth L. Malone, James J. Dooley, Judith A. Bradbury
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2010)
Article
Green & Sustainable Science & Technology
James J. Dooley, Chiara Trabucchi, Lindene Patton
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2010)
Article
Green & Sustainable Science & Technology
P. Luckow, M. A. Wise, J. J. Dooley, S. H. Kim
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2010)
Article
Green & Sustainable Science & Technology
Marshall Wise, G. Page Kyle, James J. Dooley, Son H. Kim
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2010)
Article
Green & Sustainable Science & Technology
James J. Dooley
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2011)
Letter
Green & Sustainable Science & Technology
James J. Dooley, Elizabeth L. Malone, Judith Bradbury
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2012)
Editorial Material
Green & Sustainable Science & Technology
James J. Dooley
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2013)
Article
Green & Sustainable Science & Technology
Marshall Wise, James Dooley, Robert Dahowski, Casie Dauidson
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2007)
Article
Thermodynamics
SJ Friedmann, JJ Dooley, H Held, O Edenhofer
ENERGY CONVERSION AND MANAGEMENT
(2006)
Article
Economics
J Edmonds, J Clarke, J Dooley, SH Kim, SJ Smith
Article
Thermodynamics
JA Edmonds, J Clarke, J Dooley, SH Kim, SJ Smith
Article
Thermodynamics
RT Dahowski, JJ Dooley