The effect of Fe catalyst on the release of NO during the combustion of anisotropic and isotropic carbons

Zhu, Qian; Grant, Ken; Thomas, K. Mark

doi:10.1016/0008-6223(96)00008-5

Cited by 13 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The conversion to NO from synthetic coal "M5" is higher than that from "M6" at a given temperature. Previous studies indicated that the NO conversion ratios from fuel nitrogen decreased with an increase in nitrogen content (dry and ash-free basis) in various coals [38,39], while the conversion of fuel-N to NO show a positive relationship with fuel ratio (FC/V) in the present research. Compared with pyridinic nitrogen in coal, more of the pyrrolic nitrogen is converted to NO.…”

Section: Influence Of Combustion Atmosphere On the Oxidation Of Diffesupporting

confidence: 57%

Experimental Study on NOx Reduction in Oxy-fuel Combustion Using Synthetic Coals with Pyridinic or Pyrrolic Nitrogen

Wang

Zhao

et al. 2018

Applied Sciences

View full text Add to dashboard Cite

Oxy-fuel combustion technology can capture carbon dioxide (CO2) in the large-scale and greatly lower nitrogen oxides (NOx) emission in coal-fired power plants. However, the influence of inherent minerals on NOx reduction still remains unclear and the impact of oxy-fuel combustion on the transformation of different nitrogen functional groups has yet to be fully understood. The present work aims to obtain a further understanding of the NOx reduction during oxy-fuel combustion using synthetic coals with pyrrolic or pyridinic nitrogen. Compared to pyridinic nitrogen, more of the pyrrolic nitrogen in synthetic coal was converted to NOx. The conversion ratio of nitric oxide (NO) first increased significantly with the rising oxygen content and then trended to an asymptotically constant as the oxygen (O2) content varied between 10–50%. The nitrogen dioxide (NO2) formation was roughly proportional to the oxygen content. The NO2 conversion was increased with particle size but the case of NO showed a non-monotonic variation. The catalytic effects of sodium carbonate (Na2CO3), calcium carbonate (CaCO3), and ferric oxide (Fe2O3) on the transformation of pyridinic nitrogen to NO were independent of the combustion atmosphere, while the alteration from air to the oxy-fuel combustion led to a change of mineral catalytic effect on the oxidation of pyrrolic nitrogen within the coal matrix.

show abstract

Section: Influence Of Combustion Atmosphere On the Oxidation Of Diffesupporting

confidence: 57%

Experimental Study on NOx Reduction in Oxy-fuel Combustion Using Synthetic Coals with Pyridinic or Pyrrolic Nitrogen

Wang

Zhao

et al. 2018

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Moreover, previous studies show that inorganic elements Ca and Fe could promote the generation of nitrogenous gases, especially NO and HCN. , Fe and Ca can catalyze both the oxidation of fuel N and the reduction of NO on the char surface. , Increasing the biomass share leads to the decrease of Ca and Fe contents in the mixtures. With the increase of the biomass share, the second peaks of nitrogenous gases (mainly the release of char N) are gradually weakened, especially for HCN, NH 3 , and NO.…”

Section: Resultsmentioning

confidence: 97%

“…Moreover, previous studies show that inorganic elements Ca and Fe could promote the generation of nitrogenous gases, especially NO and HCN. 36,37 Fe and Ca can catalyze both the oxidation of fuel N and the reduction of NO on the char surface. 36,38 Increasing the biomass share leads to the decrease of Ca and Fe contents in the mixtures.…”

Section: Energy and Fuelsmentioning

confidence: 99%

Thermogravimetry–Mass Spectrometry Analysis of Nitrogen Transformation during Oxy-fuel Combustion of Coal and Biomass Mixtures

Wang

Ren

et al. 2015

Energy Fuels

View full text Add to dashboard Cite

The nitrogen transformation during the oxy-fuel combustion of coal and biomass mixtures was studied through thermogravimetry−mass spectrometry (TG−MS). Influence factors, such as atmosphere and biomass share, were selected to study the release of four nitrogenous gases HCN, HNCO, NH 3 , and NO. With the presence of ≥20% O 2 , the combustion of Datong coal and biomass mixtures releases less HCN, NH 3 , and NO and more HNCO in the O 2 /CO 2 atmosphere compared to the O 2 /N 2 atmosphere. HCN and HNCO compete mutually during the formation of nitrogenous gases. The mixtures of Datong coal and biomass release more nitrogenous gases than Datong coal alone in both O 2 /CO 2 and O 2 /N 2 atmospheres during the devolatilization. With the O 2 concentration in the O 2 /CO 2 atmosphere increasing from 20 to 100%, the relative yields of NH 3 , HCN, and HNCO produced from the mixtures decrease, while the NO yield increases. The HNCO yield changes greatly with the increase of the O 2 concentration because of the oxidation by OH. Increasing the biomass share in the mixtures improves the relative yields of nitrogenous gases. The biomass share can greatly affect the HCN and HNCO yields, owing to the different forms of N-containing structures between coal and biomass.

show abstract

Vibrational Spectra of Tetrahedral Fullerenes

Cheng

Tang

1999

Journal of Molecular Spectroscopy

View full text Add to dashboard Cite

The effect of Fe catalyst on the release of NO during the combustion of anisotropic and isotropic carbons

Cited by 13 publications

References 9 publications

Experimental Study on NOx Reduction in Oxy-fuel Combustion Using Synthetic Coals with Pyridinic or Pyrrolic Nitrogen

Experimental Study on NOx Reduction in Oxy-fuel Combustion Using Synthetic Coals with Pyridinic or Pyrrolic Nitrogen

Thermogravimetry–Mass Spectrometry Analysis of Nitrogen Transformation during Oxy-fuel Combustion of Coal and Biomass Mixtures

Vibrational Spectra of Tetrahedral Fullerenes

Contact Info

Product

Resources

About