Article
Energy & Fuels
Pavel Skopec, Jan Hrdlicka, Matej Vodicka
Summary: The research results show that significantly higher SO2 capture efficiency can be achieved in oxyfuel conditions compared to air conditions. There are fundamental differences in SO2 capture between air and oxyfuel conditions in real combustion environments. The performance of the sorbent is important mainly at lower Ca/S molar ratios, and the difference in SO2 capture between sorbents decreases with increasing Ca/S ratio.
Article
Green & Sustainable Science & Technology
Geon-Uk Baek, Hoang Khoi Nguyen, Sang Hee Yoon, Ji Hong Moon, Sung Ho Jo, Sung Jin Park, Jae Young Kim, Seong Ju Kim, Sang Jun Yoon, Ho Won Ra, Sung Min Yoon, Jae Goo Lee, Kyu-bock Lee, Tae -Young Mun
Summary: This study investigated the effects of oxidant staging and limestone addition on the reductions of NO, N2O, and SO2 emissions in an oxy-circulating fluidized bed combustor. The results showed that increasing oxidant flow rate was more effective at reducing nitrogen oxide emissions, and limestone addition effectively decreased SO2 emissions caused by oxidant staging.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Environmental
Lei Pang, Yingjuan Shao, Wenqi Zhong, Hao Liu
Summary: Pressurized oxy-coal combustion has potential for high efficiency and low cost CO2 capture. Increased pressure and oxygen concentration reduce burnout time of char particles and improve their reactivity and temperature. A combustion model shows pressure's impact on char burnout time.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Zheng Gao, Xiangxin Han, Honglei Mao, Jianguo Liu, Xiumin Jiang
Summary: This study investigated the combustion behavior and NOx emissions of coal slime in a fluidized bed boiler. The characteristics of coal slime and its ash were explored using various analytical techniques. The challenges of burnout and fluidization were addressed, and the impact of heavy metal migration and alkaline substances on coal slime combustion was examined.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Tsuyoshi Yamamoto, Yuichiro Imamura, Masahiro Kishida
Summary: An efficient waste treatment method is urgently needed to decompose waste, suppress by-product generation, and minimize costs. This study investigated a microwave plasma-assisted combustor for solid waste treatment and identified the optimal experimental conditions. The combustion experiments revealed the importance of a good fluidization state for achieving successful combustion in this device.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Wei Feng, Guoping Hu, Eric F. May, Gang Kevin Li
Summary: This study evaluated two methods for synthesizing zeolite from CFBFA and optimized the synthesis conditions. The low-temperature hydrothermal method resulted in a mixture of zeolites A and X, while the alkali fusion followed by hydrothermal method produced high-quality pure phase zeolite A.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Energy & Fuels
Zhihao Yang, Lunbo Duan, Lin Li, Edward John Anthony
Summary: Biomass combustion in pressurized oxy-fuel fluidized bed is a promising carbon capture technology, but the characteristics of biomass may lead to poor mixing in industrial FB combustors. The study found that pressure and atmosphere changes do not strongly affect the position distribution probability of densified rice hull pellets in pressurized oxy-fuel combustion, but may affect the distribution of particles on the bed surface and in the splash zone.
Review
Environmental Sciences
Karoline Carvalho Dornelas, Nagela Maria Henrique Mascarenhas, Priscila Almeida dos Santos da Rocha, Ana Paula Silva Ton, Adriana Garcia do Amaral, Roselene Maria Schneider, Alicia Nayana dos Santos Lima de Brito, Dermeval Araujo Furtado, Jose Wallace Barbosa do Nascimento
Summary: Aviculture is an important industry worldwide, but it produces solid waste like bedding. To reduce environmental impact and costs, beds are reused, leading to unsanitary conditions. It is essential to treat the litter between flocks to ensure its quality and avoid passing problems to subsequent flocks. This literature review aims to explore the factors affecting thermal comfort and litter quality, as well as alternative biological treatments to guarantee reuse quality.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Li-Hui Zhang, Zhi Li, Shou-Meng Yang, Feng Duan
Summary: The study revealed that fluidized bed reburning technology is effective for treating sewage sludge with lower calorific values. Increasing the secondary fuel mass percentage led to higher unburned carbon content and CO emissions, but also increased de-NO ratio. Adding CMA to dried sludge resulted in significantly reduced emissions of SO2 and NO.
Article
Thermodynamics
Lin Li, Lunbo Duan, Zhihao Yang, Zhenkun Sun, Changsui Zhao
Summary: In this study, experimental single char combustion was conducted in a visualized pressurized FB combustor, followed by the development of an experimentally verified particle-scale char combustion model. The results showed that char conversion was accelerated with the increase of pressure, mainly due to high oxygen diffusion and char gasification. Gasification played an important role in pressurized oxy-fuel combustion, especially under high oxygen concentration and bed temperature, enhancing char oxidation rate and gasification rate and shortening burnout time. Additionally, a higher fluidization number improved mass and heat transfer, reducing burnout time and peak temperature of char particle.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Thermodynamics
Eduardo Garcia, Hao Liu
Summary: The study found that using ilmenite as the bed material can reduce CO emissions, decrease efficiency loss, but increase NOx emissions. Ilmenite can also reduce the size of agglomerates and decrease the tendency towards defluidisation.
Article
Energy & Fuels
Xiwei Ke, Markus Engblom, Hairui Yang, Anders Brink, JunFu Lyu, Man Zhang, Bing Zhao
Summary: A comprehensive 1-dimensional/1.5-dimensional hybrid mathematical model is developed to predict NOx emissions in a circulating fluidized bed combustor, taking into account various operating parameters and fuel characteristics.
Article
Thermodynamics
J. L. J. Ling, H. W. Kim, E. S. Go, S. S. Oh, H. J. Park, C. S. Jeong, S. H. Lee
Summary: The study proposed a power generation scheme integrating supercritical carbon dioxide cycle with biomass oxygen fuel circulating fluidized bed combustor to improve the power efficiency of waste biomass resources, specifically waste paper, waste wood, and cow manure. Through thermodynamic analysis and simulation comparison, the results showed that the proposed cycle could achieve higher net efficiency under specific excess oxygen ratio conditions.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Hoang Khoi Nguyen, Ji Hong Moon, Sung Ho Jo, Sung Jin Park, Dal Hee Bae, Myung Won Seo, Ho Won Ra, Sang-Jun Yoon, Sung-Min Yoon, Jae Goo Lee, Tae-Young Mun, Byungho Song
Summary: This study successfully improved the ash behavior of biomass combustion in oxy-fuel circulating fluidized bed by using kaolin as an additive, which resulted in enhanced potassium capture performance, reduced fouling formation, decreased SO2 emission, and significant improvements in combustion efficiency and CO2 concentration.
Article
Energy & Fuels
Bin Liang, Haolong Bai, Bo Tan, Liangliang Fu, Dingrong Bai
Summary: To solve the issue of burning wet coal slime in circulating fluidized bed (CFB) boilers, a proposal is made to dry coal slime in a low-temperature drying system and burn the dried fine powders in a CFB with a highly efficient separator. Experimental results show that the dried slime particles can be burned stably, efficiently, and cleanly with a particle size distribution similar to that of circulating ash particles. This study presents a potential opportunity to advance CFB combustion technology.
