The effect of different reburning fuels on NOx-reduction

Kicherer, Andreas; Spliethoff, Hartmut; Maier, H.; Hein, K. R. G.

doi:10.1016/0016-2361(94)90059-0

Cited by 56 publications

(24 citation statements)

References 1 publication

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“…NO x reduction by straw [5] shows a similar trend to that of the TCR and TGR results presented here where NO x reduction begins in a fuel lean region (SR 2 =1.04), however at the reference SR 2 of 0.92 the NOx reduction efficiency for straw is shown to be 55% compared to 77% and 79% for TCR and TGR, respectively (Fig. 8c).…”

Section: Harding Et Al (Coal); Maly Et Al (Orimulsion Bituminous Coasupporting

confidence: 81%

“…At this condition, TCR and TGR show a better NO x reduction to that of gas reburning studies (Fig. 8a) at high initial NO x concentrations carried by Spliethoff et al [19]; Kicherer et al [5] and Bilbao et al [23] reported as being 53%, 58% and 24%, respectively, at an SR 2 = 0.92. In order for these previous gas reburning studies to reach a performance (77% reduction) matching that for tyre reburning at SR 2 = 0.92, a more fuel rich environment of 0.82, 0.8, and 0.5, respectively, is required.…”

Section: Pulverised Tyre As An Alternative Fuel For Nox Reburningmentioning

confidence: 62%

“…In order for these previous gas reburning studies to reach a performance (77% reduction) matching that for tyre reburning at SR 2 = 0.92, a more fuel rich environment of 0.82, 0.8, and 0.5, respectively, is required. It is also found that gas reburn at a low initial NO x concentration [5] is significantly less efficient at reducing NO x than waste tyre (Fig. 9a).…”

Section: Pulverised Tyre As An Alternative Fuel For Nox Reburningmentioning

confidence: 90%

“…Kicherer et al [5] looked at a series of reburn fuels including coal, the NO x reduction performance of this coal has been compared to that of TCR and TGR (Fig. 8b).…”

Section: Pulverised Tyre As An Alternative Fuel For Nox Reburningmentioning

confidence: 99%

“…Kicherer et al [5] examined NO x reduction using different reburning fuels in the solid, liquid, and gaseous phase. Light fuel oil (100% volatiles), natural gas (100% volatiles) and straw (75 % volatiles) produced higher NO x reductions to that of coal (volatiles, typically 32 %).…”

Section: Introductionmentioning

confidence: 99%

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The evaluation of waste tyre pulverised fuel for NOx reduction by reburning

Nimmo¹,

Singh²,

Gibbs³

et al. 2008

Fuel

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The combustion of coal for power generation will continue to play a major role in the future, however, this must be achieved using cleaner technologies than we use at present. Scrap tyre arisings in the UK are 400,000 tonnes per year amounting to 30 million tyres and in the EU as a whole, more than 2.5 million tonnes of tyres per year are scrapped. The recent EC Waste Landfill Directive (1999) sets a deadline for the banning of whole and shredded tyres from landfill sites by 2006. Consequently, there is an urgent need to find a mass disposal route for tyres. We describe, in this paper, a novel use for tyre rubber pulverized fuel in a NOx reburning process which may have an application in power station boilers. This method of disposal could represent a way of combining waste disposal, energy recovery and pollution control within one process. A preliminary study of micronised tyre combustion was undertaken to identify the suitable size ranges for application in NOx reduction by reburning. Tests were performed in a down-fired, pulverised fuel combustor (PFC) operating at about 80kW. Superior combustion characteristics i.e. burnout were achieved with particle sizes less than 250 µm. A South African coal was used as the primary fuel in the reburn tests and the tyre was fed pneumatically via a separate feed system. Parameters studied, were, reburn zone stoichiometry and reburn fuel fraction. Additionally, the carbon content of the ash was carefully monitored for any effect on burnout at the fuel-rich reburn stoichiometries. The NOx reductions achieved with tyres are compared with reburning with coal. NO x reductions up to 80% were achieved with tyres at half of the reburn fuel feed rate required to achieve the same reductions by coal. The results have been evaluated within the context of other studies available in the literature on NOx reburning by bituminous coal, brown coal, gas and biomass.

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Section: Harding Et Al (Coal); Maly Et Al (Orimulsion Bituminous Coasupporting

confidence: 81%

Section: Pulverised Tyre As An Alternative Fuel For Nox Reburningmentioning

confidence: 62%

Section: Pulverised Tyre As An Alternative Fuel For Nox Reburningmentioning

confidence: 90%

“…Kicherer et al [5] looked at a series of reburn fuels including coal, the NO x reduction performance of this coal has been compared to that of TCR and TGR (Fig. 8b).…”

Section: Pulverised Tyre As An Alternative Fuel For Nox Reburningmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The evaluation of waste tyre pulverised fuel for NOx reduction by reburning

Nimmo¹,

Singh²,

Gibbs³

et al. 2008

Fuel

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Modelling NOx emissions during staged combustion

Fan

Yuan

et al. 1999

Int. J. Energy Res.

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Fuel Staging for No _x , Reduction in Automatic Wood Furnaces

Salzmann

Nussbaumer

2001

Progress in Thermochemical Biomass Conversion

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Emissions of nitrogen oxides from combustion processes should bc avoided since they contribute to the formation of acid rain and photoehemical smog. Following this aim, various primary measures have been developed to reduce the formation of nitrogen oxides during the combustion process. Staged combustion, meaning air Staging and fuel Staging, is known to be a suitable primary measure to minimize the NOx emissions caused by the nitrogen in the fuel. Research about air Staging for non-pulverized biomass combustion has already been done, whereas about fuel Staging no studies are published yet.

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The effect of different reburning fuels on NOx-reduction

Cited by 56 publications

References 1 publication

The evaluation of waste tyre pulverised fuel for NOx reduction by reburning

The evaluation of waste tyre pulverised fuel for NOx reduction by reburning

Modelling NOx emissions during staged combustion

Fuel Staging for No _x , Reduction in Automatic Wood Furnaces

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The effect of different reburning fuels on NOx-reduction

Cited by 56 publications

References 1 publication

The evaluation of waste tyre pulverised fuel for NOx reduction by reburning

The evaluation of waste tyre pulverised fuel for NOx reduction by reburning

Modelling NOx emissions during staged combustion

Fuel Staging for No x , Reduction in Automatic Wood Furnaces

Contact Info

Product

Resources

About

Fuel Staging for No _x , Reduction in Automatic Wood Furnaces