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.

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.

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 Assessing the Potential Contribution of Pfumvudza Towards Climate Smart Agriculture in Zimbabwe: A Review

2021 ◽  
Author(s):  
Never Mujere
Keyword(s):  
Climate Change ◽  
Nitrous Oxide ◽  
Food Security ◽  
Nitrous Oxide Emissions ◽  
Household Food Security ◽  
Potential Contribution ◽  
Mitigation And Adaptation ◽  
Household Food ◽  
Smart Agriculture ◽  
The Impact

Concerns of food and environmental security have increased enormously in recent years due to the vagaries of climate change and variability. Efforts to promote food security and environmental sustainability often reinforce each other and enable farmers to adapt to and mitigate the impact of climate change and other stresses. Some of these efforts are based on appropriate technologies and practices that restore natural ecosystems and improve the resilience of farming systems, thus enhancing food security. Climate smart agriculture (CSA) principles, for example, translate into a number of locally-devised and applied practices that work simultaneously through contextualised crop-soil-water-nutrient-pest-ecosystem management at a variety of scales. The purpose of this paper is to review concisely the current state-of-the-art literature and ascertain the potential of the Pfumvudza concept to enhance household food security, climate change mitigation and adaptation as it is promoted in Zimbabwe. The study relied heavily on data from print and electronic media. Datasets pertaining to carbon, nitrous oxide and methane storage in soils and crop yield under zero tillage and conventional tillage were compiled. Findings show that, compared to conventional farming, Pfumvudza has great potential to contribute towards household food security and reducing carbon emissions if implemented following the stipulated recommendations. These include among others, adequate land preparation and timely planting and acquiring inputs. However, nitrous oxide emissions tend to increase with reduced tillage and, the use of artificial fertilizers, pesticides and herbicides is environmentally unfriendly.

Nitrous oxide emissions from fertilised UK arable soils: Fluxes, emission factors and mitigation

2015 ◽  
Vol 212 ◽  
pp. 134-147 ◽  
Author(s):  
M.J. Bell ◽  
N. Hinton ◽  
J.M. Cloy ◽  
C.F.E. Topp ◽  
R.M. Rees ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Emission Factors ◽  
Nitrous Oxide Emissions ◽  
Arable Soils

scholarly journals Nitrous oxide emissions are enhanced in a warmer and wetter world

2017 ◽  
Vol 114 (45) ◽  
pp. 12081-12085 ◽  
Author(s):  
Timothy J. Griffis ◽  
Zichong Chen ◽  
John M. Baker ◽  
Jeffrey D. Wood ◽  
Dylan B. Millet ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Interannual Variability ◽  
Radiative Forcing ◽  
Emission Factor ◽  
Stratospheric Ozone ◽  
Nitrous Oxide Emissions ◽  
Corn Belt ◽  
Emission Mitigation ◽  
The Us ◽  
Agricultural Regions

Nitrous oxide (N2O) has a global warming potential that is 300 times that of carbon dioxide on a 100-y timescale, and is of major importance for stratospheric ozone depletion. The climate sensitivity of N2O emissions is poorly known, which makes it difficult to project how changing fertilizer use and climate will impact radiative forcing and the ozone layer. Analysis of 6 y of hourly N2O mixing ratios from a very tall tower within the US Corn Belt—one of the most intensive agricultural regions of the world—combined with inverse modeling, shows large interannual variability in N2O emissions (316 Gg N2O-N⋅y−1to 585 Gg N2O-N⋅y−1). This implies that the regional emission factor is highly sensitive to climate. In the warmest year and spring (2012) of the observational period, the emission factor was 7.5%, nearly double that of previous reports. Indirect emissions associated with runoff and leaching dominated the interannual variability of total emissions. Under current trends in climate and anthropogenic N use, we project a strong positive feedback to warmer and wetter conditions and unabated growth of regional N2O emissions that will exceed 600 Gg N2O-N⋅y−1, on average, by 2050. This increasing emission trend in the US Corn Belt may represent a harbinger of intensifying N2O emissions from other agricultural regions. Such feedbacks will pose a major challenge to the Paris Agreement, which requires large N2O emission mitigation efforts to achieve its goals.

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