Comparison of NO <inf>x</inf> reduction among different coal combustion methods and the application of decoupling combustion
MetadataShow full item record
The reduction of NO x emission via different coal combustion methods was studied in a two-stage reactor using 3 different coals. The NO x formation is effectively suppressed by reburning the gas from pyrolysis and partial gasification of coal, making the NO x emission obviously lower than that of the air-staged combustion. It is found that the decoupling combustion leads to the higher NO x reduction rate, which is over 32% in comparison with the normal combustion. The NO x reduction rates vary with the coal properties. The smaller the fuel ratio (fixed carbon to volatile matter)at per nitrogen content in coal, the lower NO x emission is for reburning the combustible gas from pyrolysis and gasification and also for the decoupling combustion. The NO x emission due to reburning the partial gasification gas varies with the oxygen amount applied in the gasification, and the lowest NO x emission is realized in the oxygen concentration from 8% to 10%. A 1.4 MW industrial boiler was designed according to the principle of the decoupling combustion technology. The running data for the same coal show that the decoupling combustion reduces 32.9% NO x emission in comparison with the traditional combustion.
Showing items related by title, author, creator and subject.
Cai, L.; Shang, X.; Gao, S.; Wang, Y.; Dong, Li; Xu, G. (2013)Through separating coal pyrolysis and char combustion and letting the pyrolysis gas burn in its passing through the combusting char bed, the so-called decoupling combustion has been proven to be effective for lowering NO ...
Gao, Xiangpeng (2011)Coal is an important part of Australia's energy mix and is expected to continue to play an essential role in supplying cheap and secure energy for powering the Australian economy in the foreseeable future. However, ...
Abdullah, Hanisom binti (2010)Mallee biomass is considered to be a second-generation renewable feedstock in Australia and will play an important role in bioenergy development in Australia. Its production is of large-scale, low cost, small carbon ...