Reducing Nitrogen Oxide Emissions by Staged Combustion of Low Calorific Value Gas derived from Agricultural Wastes

Sixto, José Manuel Cabrera; Parnell, Calvin B.; LePori, W. A.

doi:10.1006/jaer.1999.0416

Cited by 1 publication

(1 citation statement)

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“…Under the same condition, the NO x reduction ratio significantly increased from 6.05 to 40.46%. Although these samples still have a higher nitrogen content, the NO x concentrations from the HTS combustion are smaller than other published literature, , which can be attributed to the O 2 /CO 2 atmosphere. Typically, the NO x emissions of HTS260 (101 ppm) are quite close to that of HTS280 (98 ppm), indicating that a hydrothermal temperature of 260 °C was preferred in the NO x reduction in this study.…”

Section: Resultscontrasting

confidence: 59%

Effect of the Dried and Hydrothermal Sludge Combustion on Calcium Carbonate Decomposition in a Simulated Regeneration Reactor of Calcium Looping

Zhang

Duan

2020

Energy Fuels

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The regenerator reactor of the calcium looping (Ca-L) process requires the fuel combustion to provide heat for calcium carbonate (CaCO 3 ) decomposition. In this study, the dried sewage sludge (DSS) and the hydrothermally treated sludge (HTS) were used as fuels. The effect of the hydrothermal temperature on the NO x emission characteristics of HTS samples was studied. Meanwhile, the effect of the sludge combustion on the decomposition characteristic of CaCO 3 was also investigated in this study. Results showed that the hydrothermal treatment was an effective way to reduce the NO x emissions from sludge combustion in the O 2 /CO 2 atmosphere. The NO x reduction ratio significantly increases from 6.05 to 40.46% as the hydrothermal temperature increases from 200 to 280 °C. The good pore structure is formed during the CaCO 3 decomposition process. This promotes the adsorption of organic matter released during the DSS combustion and decreases the relative decomposition ratio of CaCO 3 . However, the relative decomposition ratio under the effect of the HTS combustion is improved due to the smaller volatile content in HTS. The chemical reaction model and two-dimensional diffusion control model are the best fitting for the two stages of the CaCO 3 decomposition.

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Section: Resultscontrasting

confidence: 59%