Co-firing of coal and biomass fuel blends

Sami, Muhammad; Annamalai, K.; Wooldridge, Margaret S.

doi:10.1016/s0360-1285(00)00020-4

Cited by 723 publications

(339 citation statements)

References 52 publications

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“…Biomass co-firing in coal based thermal power plants is known to reduce the emission of harmful pollutants such as the oxides of carbon, sulphur and nitrogen as well as the release of toxic substances such as mercury [1][2][3][4]. However, there are a few disadvantages associated with biomass firing and co-firing which include slightly higher plant operating costs, a modest decrease in boiler efficiency (derating) and a potential increase in ash related problems such as slagging, fouling and high temperature corrosion of heat transfer surfaces [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Prediction of biomass ash fusion behaviour by the use of detailed characterisation methods coupled with thermodynamic analysis

Rizvi

Xing

Pourkashanian

et al. 2015

Fuel

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ReuseUnless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. AbstractAsh deposition such as slagging and fouling on boiler tube surfaces is an inevitable, though undesirable consequence of burning solid fuels in boilers. The role of fuel characteristics, in affecting the form and severity of the problem, is significant. In recent years, biomass fuels have gained increasing popularity as an environmentally friendly source of energy in power plants all over the world. This study is based on characterising the fusion behaviour of four biomass fuels (pine wood, peanut shells, sunflower stalk and miscanthus) using ash fusion temperature (AFT) tests, simultaneous thermal analysis (STA) of fuel ashes, calculation of empirical indices and predicting ash melting behaviour with the help of thermodynamic equilibrium calculations. The AFT results failed to show any clear trend between fusion temperature and high alkali content of biomass. STA proved useful in predicting the different changes occurring in the ash. Empirical indices predicted high slagging and fouling hazards for nearly all the biomass samples and this was supported by the possible existence of a melt phase at low temperatures as predicted by thermodynamic calculations.

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Section: Introductionmentioning

confidence: 99%

Prediction of biomass ash fusion behaviour by the use of detailed characterisation methods coupled with thermodynamic analysis

Rizvi

Xing

Pourkashanian

et al. 2015

Fuel

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“…Co-combustion of biomass and coal has generated widespread interest because of the reduced emissions of gases such as CO 2 , SO 2 and NO x compared to those emitted by the combustion of coal [18]. The cofiring of biomass with coal is advantageous since biomass has higher volatile matter content and lower devolatilization temperature, which can aid the ignition and combustion characteristics of the blend [19]. Lai et al [20] compared the combustion behaviour of lignocellulosic materials in CO 2 /O 2 and N 2 /O 2 atmospheres and calculated the kinetic parameters considering three parallel reactions during the combustion.…”

Section: Introductionmentioning

confidence: 99%

Kinetic models for the oxy-fuel combustion of coal and coal/biomass blend chars obtained in N2 and CO2 atmospheres

Gil

Riaza

Álvarez

et al. 2012

Energy

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The thermal reactivity and kinetics of five coal chars, a biomass char, and two coal/biomass char blends in an oxy-fuel combustion atmosphere (30%O 2 -70%CO 2 )were studied using the non-isothermal thermogravimetric method at three heating rates.Fuel chars were obtained by devolatilization in an entrained flow reactor at 1273 K under N 2 and CO 2 atmospheres.Three nth-order representative gas-solid models -the volumetric model (VM), the grain model (GM) and the random pore model (RPM) -were employed to describe the reactive behaviour of the chars. The RPM model was found to be the best for describing the reactivity of the high rank coal chars, while VM was the model that best described the reactivity of the bituminous coal chars, the biomass char and the coal-biomass blend char. The kinetic parameters of the chars obtained in N 2 and CO 2 in an oxy-fuel combustion atmosphere with 30% of oxygen were compared, but no relevant differences were observed. The behaviour of the blend of the bituminous coal (90%wt.) and the biomass (10%wt.) chars resembled that of the individual coal concealing the effect of the biomass. Likewise, no interaction was detected between the high rank coal and the biomass chars during oxy-fuel combustion of the blend.

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“…The mentioned advantages are main reasons for which biomass combustion is often considered in the form of its combustion together with traditional fuels in the process of the so-called biomass co-combustion (Sami et al, 2001). Unfortunately, both combustion and co-combustion of biomass shows many problems.…”

Section: Introductionmentioning

confidence: 99%

Impact of the Temperature of Waste Biomass Py-Rolysis on the Quality of the Obtained Biochar

Marczak

Karczewski

Makowska

et al. 2016

Agricultural Engineering

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Combustion and co-combustion of biomass from different sources is one of the most popular technologies applied in Poland. It allows management of numerous industrial, communal and agricultural waste. Organic waste constitutes one of the richest sources of cheap biomass solid fuels since they are very popular. The paper includes an assessment of practical use of biomass waste: hazelnut shell and pistachio nut shell. The impact of pyrolysis temperature (300, 450 and 550ºC) of the investigated biomass on the quality of the obtained biochar was determined and the optimal temperature of this process was defined. The quality of the investigated biomass was analysed on account of its use for energy purposes. Numerous advantageous properties of the obtained materials were found out, for instance: low content of ash and a noticeable increase of the calorific value with an increase of the pyrolysis temperature.

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Co-firing of coal and biomass fuel blends

Cited by 723 publications

References 52 publications

Prediction of biomass ash fusion behaviour by the use of detailed characterisation methods coupled with thermodynamic analysis

Prediction of biomass ash fusion behaviour by the use of detailed characterisation methods coupled with thermodynamic analysis

Kinetic models for the oxy-fuel combustion of coal and coal/biomass blend chars obtained in N2 and CO2 atmospheres

Impact of the Temperature of Waste Biomass Py-Rolysis on the Quality of the Obtained Biochar

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