A pilot-scale fireside deposit study of co-firing Cynara with two coals in a fluidised bed

Aho, Martti; Gil, Ana Jesús Mateos; Taipale, Raili; Vainikka, Pasi; Vesala, Hannu

doi:10.1016/j.fuel.2007.03.046

Cited by 70 publications

(36 citation statements)

References 25 publications

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“…After collection, the ash deposits obtained from biomass co-firing/combustion are usually characterized by a variety of laboratory techniques, including inductively coupled plasma-atomic emission spectrometry (ICP-AES), X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive X-ray spectrometry (EDX), and ion chromatography (IC). ICP-AES, XRF and SEM-EDX were applied to analyze the major elements present in the fuel ash and deposits, including Si, Al, Fe, Ca, Mg, Ti, Na, K, P, Cl and S [37,[45][46][47][48][49], as well as Pb and Zn for some fuels such as recycled tires [21,22]. Most of these elements would contribute to ash deposition and agglomeration/clickers formation, especially for grate and fluidized bed combustion applications.…”

Section: Ash Deposition Monitoring and Analysis Of Ash Depositsmentioning

confidence: 99%

“…XRD is commonly used for the identification of the major crystalline phases in deposits [47,53,54]. Because of high chlorine contents in most of biomass, IC has been developed as a practical method to determine chlorine and sulphur concentration in the deposits [15,48].…”

Section: Ash Deposition Monitoring and Analysis Of Ash Depositsmentioning

confidence: 99%

“…Research efforts have been put into attempting to understand the mechanisms involved in the formation [15,44,48,55,56], slagging/fouling [52] and corrosion [35] of the ash deposits during biomass combustion or co-firing. During combustion processes, ash is formed from the fuel-bound inorganic materials through a combination of complex chemical and physical processes.…”

Section: Mechanisms and Chemistry Of Ash Depositionmentioning

confidence: 99%

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Ash Deposition in Biomass Combustion or Co-Firing for Power/Heat Generation

et al. 2012

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This paper presents a concise overview of ash deposition in combustion or co-firing of biomass (woody biomass, agricultural residues, peat, etc.) with other fuels for power/heat generation. In this article, the following five research aspects on biomass combustion ash deposition are reviewed and discussed: influence of biomass fuel characteristics, deposit-related challenges, ash deposition monitoring and analysis of ash deposits, mechanisms and chemistry of fly ash deposition, and key technologies for reducing ash deposition and corrosion in biomass-involved combustion.

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Section: Ash Deposition Monitoring and Analysis Of Ash Depositsmentioning

confidence: 99%

Section: Ash Deposition Monitoring and Analysis Of Ash Depositsmentioning

confidence: 99%

Section: Mechanisms and Chemistry Of Ash Depositionmentioning

confidence: 99%

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Ash Deposition in Biomass Combustion or Co-Firing for Power/Heat Generation

et al. 2012

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“…Recent articles have shown that the quality of the biomass harvested from this crop needs to be improved for its application as a solid biofuel [4].…”

Section: Introductionmentioning

confidence: 99%

“…The high ash content of some samples has been attributed to soil contamination as a consequence of the harvesting method [1,4] while slagging problems could be a consequence of the high contents of potassium and chlorine. High potassium contents have been related to mechanisms of osmotic adjustment in Cynara seedlings [6].…”

Section: Introductionmentioning

confidence: 99%

Potassium fertilisation and the thermal behaviour of Cynara cardunculus L.

Solano

Manzanedo

Concheso

et al. 2010

Biomass and Bioenergy

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Keywords: Cynara biomass Potassium fertilisers Combustion Thermal Analysis Scanning electron microscopy Herbaceous biomass like Cynara is commonly high in potassium, chlorine and ash, which has been reported as a source of problems for combustion applications. An appropriate management of the potassium fertilisation is suggested as a way of improving the quality of the Cynara biomass for solid fuel applications. In this work a factorial experiment was designed involving two types of fertilisers, KC1 and K 2 S0 4 , and two K rates, in order to study the effect of potassium fertilisation on the composition and thermal behaviour of Cynara biomass. The results proved that the potassium content of Cynara biomass increases with the potassium fertilisation. The thermogravimetric study showed that sintering phenomena can be expected at temperatures higher than 900 °C when the crop has been highly K-fertilised, irrespective of the type of fertiliser used, KC1 or K 2 S0 4 . However, the SEM images taken of samples of the four K treatments of this experiment did not reveal signs of ash melting, although some particles with crystalline appearance appeared in the samples from highly K-fertilised treatments.

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Co‐Firing Biomass with Coal in Fluidized Bed Combustion Systems

Selçuk

Gogebakan

2010

Handbook of Combustion

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This chapter overviews direct co‐firing applications of agricultural and forestry residues with coal in fluidized bed combustion (FBC) systems, which is the most promising technology due to its fuel flexibility and high efficiency. Similarities and differences in characteristics of biomass and coal are summarized. Issues on operational problems and their possible solutions in FBC systems firing biomass only are identified. Among the available solutions to these problems, co‐firing biomass with coal is the most effective and simple option. Experiences obtained from several biomass/coal blends in FBC systems, ranging from laboratory rigs to large‐scale utility boilers, are presented to emphasize the impact of co‐firing on combustion efficiency, emissions and ash‐related operational problems.

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A pilot-scale fireside deposit study of co-firing Cynara with two coals in a fluidised bed

Cited by 70 publications

References 25 publications

Ash Deposition in Biomass Combustion or Co-Firing for Power/Heat Generation

Ash Deposition in Biomass Combustion or Co-Firing for Power/Heat Generation

Potassium fertilisation and the thermal behaviour of Cynara cardunculus L.

Co‐Firing Biomass with Coal in Fluidized Bed Combustion Systems

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