Article
Energy & Fuels
Mohsen Abdelaal, Medhat El-Riedy, Ahmed M. El-Nahas, Fathy R. El-Wahsh
Summary: This experimental study investigates the effect of flue gas recirculation on non-premixed combustion for NOx reduction and CO2 capture and storage. The results show that flame stability can be improved with certain percentages of recirculated flue gas, leading to a reduction of NOx emissions but also causing a decrease in flame temperature.
Article
Green & Sustainable Science & Technology
Seong-il Kim, Hosoo Lee, Yong Woon Lee, Won Yang
Summary: In a simulated A-USC POXY power plant, wet FGR was found to provide 3.5% higher plant efficiency compared to dry FGR, with less sensitivity to variations in recirculated gas flowrates. The wet FGR system was demonstrated to be an optimal choice for improving the plant net efficiency by approximately 10% compared to first-generation oxy-combustion power plants at atmospheric pressure.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
Article
Engineering, Chemical
Giorgia De Guido
Summary: This article focuses on the CO2 capture from oxy-combustion flue gas using a distillation-based hybrid process and analyzes the energy and economic aspects. The results show that the hybrid process has lower energy consumption compared to standalone cryogenic distillation, although it has higher capital costs.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Energy & Fuels
Ming-Xin Xu, Hai-Bo Wu, Ya-Chang Wu, Han-Xiao Wang, Hao-Dong Ouyang, Qiang Lu
Summary: The process of flue gas compression and purification plays a crucial role in determining the quality of CO2 product in oxy-fuel combustion. A novel system integrating partial CO2 recirculation with flue gas purification was proposed and evaluated, achieving a purity of 99.9% CO2 stream. Enhancing condensing pressure to 3.0-4.0 MPa improved CO2 recovery performance, while critical ratios between recycled CO2 liquid and raw flue gas were identified for efficient contaminant abatement. The efficiencies of SO2 and NO removal exceeded 99%, with critical molar ratios and reactions pressures determining the success of abatement.
Article
Agricultural Engineering
Liping Tan, Lei Cai, Yanlei Xiang, Yanwen Guan, Wenbin Liu
Summary: This study establishes a biomass integrated gasification combined cycle with oxy-fuel combustion technology to achieve negative CO2 emissions in power plants. The effects of gas turbine pressure ratio and inlet temperature on the system performance are investigated. The results show that the system efficiency increases with the increase of CO2/C value, gas turbine pressure ratio, and inlet temperature. The results obtained in this study can provide theoretical support for the application of this technology.
BIOMASS & BIOENERGY
(2022)
Article
Energy & Fuels
Joon Ahn, Hyouck-Ju Kim
Summary: A 0.5 MW oxy-fuel boiler was developed to capture CO2 from exhaust gas using natural gas as fuel, showing distinct characteristics from traditional pulverized coal boilers. Oxy-fuel combustion without FGR was examined, demonstrating stable flames with the inclusion of water vapor in the recirculated gas. The combustion resulted in over 90% CO2 capture while maintaining boiler performance and meeting exhaust gas regulations.
Article
Thermodynamics
Hyung Woo Kim, Su Been Seo, Seo Yeong Kang, Eun Sol Go, Seung Seok Oh, YongWoon Lee, Won Yang, See Hoon Lee
Summary: This paper focuses on the design and modeling of an indirect S-CO2 cycle in an oxy-fuel circulating fluidized bed power plant. By reducing the temperature of the recirculated flue gas and analyzing the effect of water retention in the flue gas on overall net efficiency, the plant achieved higher net efficiency.
Article
Thermodynamics
Hendrik Nicolai, Paulo Debiagi, Xu Wen, Louis Dressler, Anna Massmeyer, Johannes Janicka, Christian Hasse
Summary: This work introduces a new approach based on Large-Eddy Simulation (LES) coupled with a flamelet description of the gas-phase and seamless detailed solid-fuel kinetics, and applies it to a self-sustained oxy-fuel coal combustion chamber. The approach enables a detailed description of the turbulent flow field, mixing, and heat transfer, including thermal radiation and the radiative transport equation. The flamelet description of the gas phase allows for accurate and computationally efficient representation of turbulence-chemistry interactions. Coupled with a solid-fuel kinetic mechanism, it allows for seamless simulation of the particle conversion process.
COMBUSTION AND FLAME
(2022)
Article
Energy & Fuels
Hendrik Nicolai, Paulo Debiagi, Johannes Janicka, Christian Hasse
Summary: Oxy-fuel combustion combined with carbon capture technologies has the potential to rapidly reduce CO2 emissions in coal-fired power plants. However, the combustion of solid fuels in an oxygen-carbon dioxide environment is not fully understood. This study aims to analyze the impact of oxygen content on thermo-chemical conversion by applying a recently developed approach to a range of oxy-fuel swirl flames.
Article
Thermodynamics
Haifeng Zan, Xiaoping Chen, Suyang Pan, Pengfei Geng, Daoyin Liu, Jiliang Ma, Cai Liang
Summary: Pressurised oxy-fuel combustion is a promising combustion technology that is both clean and efficient. The high concentration of steam in the flue gas affects the emission of gaseous pollutants. This study investigates the effect of high steam concentrations on NOx emission mechanisms in pressurised oxy-fuel combustion.
JOURNAL OF THERMAL SCIENCE
(2023)
Article
Engineering, Environmental
David Stokie, Piyush Verma, Benjamin M. Kumfer, Grigoriy Yablonsky, A. K. Suresh, Richard L. Axelbaum
Summary: To achieve purity standard for carbon sequestration, removal of SOx and NOx is crucial in pressurized oxy-combustion of coal. Experimental pilot-scale direct contact column demonstrates efficient removal of both pollutants, with NO oxidation being the controlling reaction. Higher residence time in the column leads to over 90% NOx removal efficiency, while oxygen concentration has minimal impact above 1% v/v. Total NOx scrubbing efficiency is reduced by approximately 10% at high temperatures compared to room temperature, while SOx removal remains above 93% under all conditions.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Green & Sustainable Science & Technology
Hetian Chi, Miguel A. Pans, Chenggong Sun, Hao Liu
Summary: In this study, the use of molochite and dolomite as bed additives in a fluidised bed combustor was investigated to counter agglomeration during the combustion of wheat straw and miscanthus pellets. The results showed that dolomite was superior to molochite in prolonging defluidisation time when firing wheat straw. Lime addition to fuel had the most significant improvement on combustion performance for both fuels. The oxy-fuel combustion atmosphere had a great impact on the effectiveness of dolomite but little influence on the effectiveness of molochite.
Article
Green & Sustainable Science & Technology
Qunli Zhang, Haotian Huang, Hongbao Zhai, Wenqiang Zhao, Xiaoshu Lu
Summary: To solve heat loss and pollution in gas boilers, a synergistic system comprising of waste heat recovery tower and air humidification tower is proposed. Increasing air moisture content can inhibit nitrogen oxide generation and increase flue gas dew point, thus enabling the utilization of flue gas waste heat. The heat pump in the system can recover 6.94% of heat while minimizing nitrogen oxide emissions to 39.66 mg/m³, improving boiler heating efficiency.
JOURNAL OF CLEANER PRODUCTION
(2023)
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
Energy & Fuels
Monika Kosowska-Golachowska, Adam Luckos, Tomasz Czakiert
Summary: The utilization of biomass as a carbon-neutral fuel can reduce greenhouse gas emissions. This study compares the emissions from the combustion of different energy crops with reference coal and shows that biomass has lower emissions. The oxidation of volatile nitrogen compounds is the main cause of high NOx emissions from biomass combustion.
Article
Chemistry, Applied
Quang Anh Tran, Rohan Stanger, Wei Xie, John Lucas, Jianglong Yu, Michael Stockenhuber, Eric Kennedy, Terry Wall
FUEL PROCESSING TECHNOLOGY
(2016)
Article
Energy & Fuels
Rohan Stanger, Quang Anh Tran, Nathan Smith, Eric Kennedy, Michael Stockenhuber, John Lucas, Terry Wall
Article
Energy & Fuels
Wei Xie, Rohan Stanger, Quang Anh Tran, Nathan Smith, Terry Wall, John Lucas
Article
Energy & Fuels
Rohan Stanger, Quang Anh Tran, Mariah Browne, John Lucas, Minoo Naebe, Murray Height, Terry Wall
Article
Energy & Fuels
Jessica A. Allen, Michael Glenn, Priyanthi Hapugoda, Rohan Stanger, Graham O'Brien, Scott W. Donne
Article
Chemistry, Analytical
Quang Anh Tran, Rohan Stanger, Wei Xie, Nathan Smith, John Lucas, Terry Wall
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2018)
Article
Engineering, Chemical
Dunyu Liu, Jing Jin, Zhibo Xiong, Rohan Stanger, Terry Wall
ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING
(2018)
Article
Energy & Fuels
Soonho Lee, Jianglong Yu, Merrick Mahoney, Priscilla Tremain, Behdad Moghtaderi, Arash Tahmasebi, Rohan Stanger, Terry Wall, John Lucas
Article
Chemistry, Physical
Omid Zabihi, Sajjad Shafei, Seyed Mousa Fakhrhoseini, Mojtaba Ahmadi, Hossein Ajdari Nazarloo, Rohan Stanger, Quang Anh Tran, John Lucas, Terry Wall, Minoo Naebe
Article
Chemistry, Applied
Quang Anh Tran, Rohan Stanger, Wei Xie, Nathan Smith, John Lucas, Terry Wall
FUEL PROCESSING TECHNOLOGY
(2019)
Article
Chemistry, Applied
Soonho Lee, Jianglong Yu, Merrick Mahoney, Arash Tahmasebi, Rohan Stanger, Terry Wall, John Lucas
FUEL PROCESSING TECHNOLOGY
(2019)
Article
Chemistry, Applied
Wei Xie, Rohan Stanger, Quang Anh Tran, Merrick Mahoney, John Lucas, Jianglong Yu, Terry Wall
FUEL PROCESSING TECHNOLOGY
(2019)
Article
Energy & Fuels
Yuxin Yan, Ying Qi, Marc Marshall, W. Roy Jackson, Andrew Stanger, Quang Anh Tran, Rohan Stanger, Alan L. Chaffee
Summary: The study utilizes a mineral-separation process to produce density fractions of low-rank coals with varying maceral group proportions for analysis of their physical and chemical properties. The findings aim to suggest new ways of utilizing the vast Victorian brown coal resource.
Article
Multidisciplinary Sciences
Dunyu Liu, Jing Jin, Ming Gao, Zhibo Xiong, Rohan Stanger, Terry Wall