Effect of co-combustion of chicken litter and coal on emissions in a laboratory-scale fluidized bed combustor

Li, Songgeng; Wu, Andy; Deng, Shuang; Pan, Wei‐Ping

doi:10.1016/j.fuproc.2007.06.003

Cited by 38 publications

(26 citation statements)

References 9 publications

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“…These authors believe that lower NO x emissions may occur during cocombustion than with individual coals because most of the biomass is released as volatiles (about 75% at temperatures above 800 ºC) and the fuel-N in the biomass is predominantly liberated as NH 3 which may on the one hand form NO x , but also act as a reducing agent in further reactions with NO x to form N 2 . Since most of fuel-N in coal is retained in the char and is then oxidised to NO x , the NH 3 originating from the biomass may lead to the reduction of NO x , since the high amount of released volatile matter from the biomass combustion produces a fuel-rich condition in the atmosphere which would favour the reduction of NO [33]. Akpulat et al [34] studied the co-combustion of coal and olive cake in a fluidized bed combustor and they attribute the decrease in NO x concentrations to the percentage of olive cake in the fuel being increased by the higher amount of volatile matter evolved from the olive cake, and to the generation of high levels of hydrocarbon radicals and CO formation (reducing atmosphere) in the freeboard region.…”

Section: No Emissionsmentioning

confidence: 99%

Oxy-fuel combustion of coal and biomass blends

Riaza

Gil

Álvarez

et al. 2012

Energy

149

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The ignition temperature, burnout and NO emissions of blends of a semi-anthracite and a high-volatile bituminous coal with 10 and 20 wt.% of olive waste were studied under oxy-fuel combustion conditions in an entrained flow reactor (EFR). The results obtained under several oxy-fuel atmospheres (21%O 2 -79%CO 2 , 30%O 2 -70% CO 2 and 35%O 2 -65%CO 2 ) were compared with those attained in air. The results indicated that replacing N 2 by CO 2 in the combustion atmosphere with 21% of O 2 caused an increase in the temperature of ignition and a decrease in the burnout value. When the O 2 concentration was increased to 30 and 35%, the temperature of ignition was lower and the burnout value was higher than in air conditions. A significant reduction in ignition temperature and a slight increase in the burnout value was observed after the addition of biomass, this trend becoming more noticeable as the biomass concentration was increased. The emissions of NO during oxy-fuel combustion were lower than under air-firing. However, they remained similar under all the oxy-fuel atmospheres with increasing O 2 concentrations. Emissions of NO were significantly reduced by the addition of biomass to the bituminous coal, although this effect was less noticeable in the case of the semianthracite.

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Section: No Emissionsmentioning

confidence: 99%

Oxy-fuel combustion of coal and biomass blends

Riaza

Gil

Álvarez

et al. 2012

Energy

149

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“…The fuel was therefore dried to a moisture content of 11% before combustion. Other researchers propose the co-combustion of chicken manure with peat (Abelha et al, 2003) or with coal (Li et al, 2008) to have a stable combustion in a fluidised bed combustor.…”

Section: Co-firing With Other Wastesmentioning

confidence: 99%

Physico-chemical analysis and calorific values of poultry manure

et al. 2010

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“…However, excess application of PW can lead to an overabundance of nutrients in the watershed, with a resulting eutrophication on water bodies and water pollutions (e.g., nitrate contamination). As a result, excess application of PW can pose a risk to the health of humans, animals, and the aquatic ecosystem [2,4]. Because of its energetic and superior fuel properties, PW is recognized as a biomass …”

Section: Introductionmentioning

confidence: 99%

Regression Model to Predict the Higher Heating Value of Poultry Waste from Proximate Analysis

et al. 2018

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Improper land application of excess poultry waste (PW) causes environmental issues and other problems. Meanwhile there is an increasing trend of using PW as an alternative energy resource. The Higher Heating Value (HHV) is critical for designing and analyzing the PW conversion process. Several proximate-based mathematical models have been proposed to estimate the HHV of biomass, coal, and other solid fuels. Nevertheless, only a small number of studies have focused on a subclass of fuels, especially for PW. The aim of this study is to develop proximate-based regression models for an HHV prediction of PW. Sample data of PW were collected from open literature to develop regression models. The resulting models were then validated by additional PW samples and other published models. Results indicate that the most accurate model contains linear (all proximate components), polynomial terms (quadratic and cubic of volatile matter), and interaction effect (fixed carbon and ash). Moreover, results show that best-fit regression model has a higher R 2 (91.62%) and lower estimation errors than the existing proximate-based models. Therefore, this new regression model can be an excellent tool for predicting the HHV of PW and does not require any expensive equipment that measures HHV or elemental compositions.

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Effect of co-combustion of chicken litter and coal on emissions in a laboratory-scale fluidized bed combustor

Cited by 38 publications

References 9 publications

Oxy-fuel combustion of coal and biomass blends

Oxy-fuel combustion of coal and biomass blends

Physico-chemical analysis and calorific values of poultry manure

Regression Model to Predict the Higher Heating Value of Poultry Waste from Proximate Analysis

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