Effect of coal rank and circulating fluidized-bed operating parameters on nitrous oxide emissions

1993 ◽  
Vol 7 (4) ◽  
pp. 554-558 ◽  
Author(s):  
Michael E. Collings ◽  
Michael D. Mann ◽  
Brian C. Young
Keyword(s):  
Nitrous Oxide ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Nitrous Oxide Emissions ◽  
Operating Parameters ◽  
Coal Rank

Effect of sulfur dioxide removal by limestone on nitrogen oxide (NOx) and nitrous oxide emissions from a circulating fluidized bed combustor

1992 ◽  
Vol 6 (6) ◽  
pp. 753-757 ◽  
Author(s):  
Tadaaki Shimizu ◽  
Yutaka Tachiyama ◽  
Daisuke Fujita ◽  
Kenichi Kumazawa ◽  
Osamu Wakayama ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Sulfur Dioxide ◽  
Nitrogen Oxide ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Nitrous Oxide Emissions ◽  
Sulfur Dioxide Removal ◽  
Fluidized Bed Combustor

scholarly journals A Study on Methane and Nitrous Oxide Emissions Characteristics from Anthracite Circulating Fluidized Bed Power Plant in Korea

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Seehyung Lee ◽  
Jinsu Kim ◽  
Jeongwoo Lee ◽  
Eui-Chan Jeon
Keyword(s):  
Climate Change ◽  
Nitrous Oxide ◽  
Fluidized Bed ◽  
Emission Factor ◽  
Circulating Fluidized Bed ◽  
Calorific Value ◽  
Emission Factors ◽  
Nitrous Oxide Emissions ◽  
To Come ◽  
Country Specific

In order to tackle climate change effectively, the greenhouse gas emissions produced in Korea should be assessed precisely. To do so, the nation needs to accumulate country-specific data reflecting the specific circumstances surrounding Korea’s emissions. This paper analyzed element contents of domestic anthracite, calorific value, and concentration of methane (CH4) and nitrous oxide (N2O) in the exhaust gases from circulating fluidized bed plant. The findings showed the concentration of CH4and N2O in the flue gas to be 1.85 and 3.25 ppm, respectively, and emission factors were 0.486 and 2.198 kg/TJ, respectively. The CH4emission factor in this paper was 52% lower than default emission factor presented by the IPCC. The N2O emission factor was estimated to be 46% higher than default emission factor presented by the IPCC. This discrepancy can be attributable to the different methods and conditions of combustion because the default emission factors suggested by IPCC take only fuel characteristics into consideration without combustion technologies. Therefore, Korea needs to facilitate research on a legion of fuel and energy consumption facilities to develop country-specific emission factors so that the nation can have a competitive edge in the international climate change convention in the years to come.

Optimization of Operating Parameters of Liquid-Liquid Circulation Fluidized Bed for Ice-Making Based on Exergy Method

2011 ◽  
Vol 236-238 ◽  
pp. 600-603
Author(s):  
Kun Feng Liang ◽  
Chun Yan Gao ◽  
Lin Wang
Keyword(s):  
Heat Transfer ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Droplet Diameter ◽  
Storage System ◽  
Second Law Of Thermodynamics ◽  
Operating Parameters ◽  
Inlet Temperature ◽  
Contact Heat ◽  
Novel Method

A novel method of dynamic ice forming, liquid-liquid circulating fluidized bed, was studied using direct contact heat transfer between drops and the coolant for ice storage system. In order to model multiphase flows and heat transfer in circulating fluidized bed, a numerical model was developed. Exergy discharge was discussed for liquid-liquid circulating fluidized bed based on the second law of thermodynamics. Numerical method was used to study the influence of operating parameters, such as the droplet diameter and the inlet temperature or velocity average of liquid phase, on the ice-making performance and total exergy discharge in the dynamic ice-making process.

scholarly journals Development of Methane and Nitrous Oxide Emission Factors for the Biomass Fired Circulating Fluidized Bed Combustion Power Plant

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Chang-Sang Cho ◽  
Jae-Hwan Sa ◽  
Ki-Kyo Lim ◽  
Tae-Mi Youk ◽  
Seung-Jin Kim ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Fluidized Bed ◽  
Emission Factor ◽  
Circulating Fluidized Bed ◽  
Wood Chip ◽  
Emission Factors ◽  
Fluidized Bed Combustion ◽  
Cfb Boiler ◽  
Combustion Technology ◽  
The Subject

This study makes use of this distinction to analyze the exhaust gas concentration and fuel of the circulating fluidized bed (CFB) boiler that mainly uses wood biomass, and to develop the emission factors of Methane (CH4), Nitrous oxide (N2O). The fuels used as energy sources in the subject working sites are Wood Chip Fuel (WCF), RDF and Refused Plastic Fuel (RPF) of which heating values are 11.9 TJ/Gg, 17.1 TJ/Gg, and 31.2 TJ/Gg, respectively. The average concentrations of CH4and N2O were measured to be 2.78 ppm and 7.68 ppm, respectively. The analyzed values and data collected from the field survey were used to calculate the emission factor of CH4and N2O exhausted from the CFB boiler. As a result, the emission factors of CH4and N2O are 1.4 kg/TJ (0.9–1.9 kg/TJ) and 4.0 kg/TJ (2.9–5.3 kg/TJ) within a 95% confidence interval. Biomass combined with the combustion technology for the CFB boiler proved to be more effective in reducing the N2O emission, compared to the emission factor of the CFB boiler using fossil fuel.

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