Thermal performance and NOx emission characteristics studies on a premixed methane-ammonia-fueled micro-planar combustor

A computational fluid dynamics (CFD) model of a 600 MW opposed swirling coal-fired utility boiler has been established. The chemical percolation devolatilization (CPD) model, instead of an empirical method, has been adapted to predict the nitrogen release during the devolatilization. The current CFD model has been validated by comparing the simulated results with the experimental data obtained from the boiler for case study. The validated CFD model is then applied to study the effects of ratio of over fire air (OFA) on the combustion and nitrogen oxides (NOx) emission characteristics. It is found that, with increasing the ratio of OFA, the carbon content in fly ash increases linearly, and the NOx emission reduces largely. The OFA ratio of 30% is optimal for both high burnout of pulverized coal and low NOx emission. The present study provides helpful information for understanding and optimizing the combustion of the studied boiler

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Influence of nozzle height to width ratio on ignition and NOx emission characteristics of semicoke/bituminous coal blends in a 300 kW pulverized coal-fired furnace

Frontiers in Energy ◽

10.1007/s11708-021-0726-3 ◽

2021 ◽

Author(s):

Liutao Sun ◽

Yonghong Yan ◽

Rui Sun ◽

Zhengkang Peng ◽

Chunli Xing ◽

...

Keyword(s):

Bituminous Coal ◽

Pulverized Coal ◽

Nox Emission ◽

Width Ratio ◽

Emission Characteristics ◽

Nozzle Height

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Simulation and Application of NOX Emission Characteristics in the Vertical Flue of 6 m Coke Oven

Transactions of the Indian Institute of Metals ◽

10.1007/s12666-021-02250-5 ◽

2021 ◽

Author(s):

Fu-jun Liu ◽

Ke-Liang Pang ◽

Chao Wang ◽

Ji Wu ◽

Qiu-ye Cai

Keyword(s):

Coke Oven ◽

Nox Emission ◽

Emission Characteristics

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Can hydrogen enriched biogas be used as domestic fuel? - Part II: Pollutants Emission from Combustion of Biogas/H2/air Fuel Mixture

HKIE Transactions ◽

10.33430/v28n2thie-2020-0042 ◽

2021 ◽

Vol 28 (2) ◽

pp. 68-74

Author(s):

Udaya Kahangamage ◽

Yi Chen ◽

Quan Zhou ◽

Chun Wah Leung

Keyword(s):

Thermal Performance ◽

Biogas Production ◽

Fuel Mixture ◽

Pollutant Emissions ◽

Emission Characteristics ◽

Environmentally Conscious ◽

Performance And Emission ◽

Wide Range ◽

Pollutants Emission ◽

Domestic Fuel

Biogas is considered a sustainable source of energy which is largely untapped owing to its inherent weaknesses such as low thermal performance and potentially harmful emissions. Its thermal performance and emission characteristics can be enhanced through the technique of enriching with higher grade fuel. In this research study, biogas enriched with hydrogen was tested for its emission characteristics. A synthetic biogas identified as BG60 (60% CH4 and 40% CO2) enriched with 20% hydrogen (80%BG60-20%H2) was used for the test. Experiments were carried out for combustion of the enriched gas for a wide range of Reynolds numbers and equivalence ratios. The results indicate that the enriched fuel emits less CO and NOx than commonly used domestic fuel LPG. It also has a better thermal and emission performance than BG60. The low pollutant emissions compared with LPG, use of renewable feedstock for biogas production, and competitive cost may make the blended 80%BG60-20%H2 an attractive sustainable alternative domestic fuel choice for environmentally conscious urban dwellers of modern cities.

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Effect of Cetane Number Improver on Emission Characteristics of Methanol/Diesel Blend Fuel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.512-515.1888 ◽

2012 ◽

Vol 512-515 ◽

pp. 1888-1891

Author(s):

Jia Yi Du ◽

Wei Xun Zhang ◽

Deng Pan Zhang ◽

Zhen Yu Sun

Keyword(s):

Diesel Engine ◽

Direct Injection ◽

Cetane Number ◽

Nox Emission ◽

Fuel Load ◽

Emission Characteristics ◽

Soot Emission ◽

Maximum Torque ◽

Blend Fuel ◽

Co Emission

The influence of cetane number improver on emission characteristics of diesel engine fueled with methanol/diesel blend fuel was investigated. Methanol/diesel blend fuel was prepared, in which the methanol content is 10%, different mass fraction (0%，0.5%) of cetane number improver were added to the blend fuel. Load characteristic experiments at maximum torque speed of the engine were carried out on 4B26 direct injection diesel engine. The results show that, compared with the engine fueled with diesel, the CO emission increases under low loads and reduces under medium and high loads, the HC emission increases, the NOx emission decreases under medium and low loads and increases under high loads, the soot emission reduces significantly when the diesel engine fueled with blends. When cetane number improver was added to blends, the CO and NOx emission reduces, the HC emission decreases, the soot emission increases to some extent compared with the methanol/dieselblend fuel without cetane number improver.

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