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combustion aditives for adjustment of ash melting point biomass

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Ash related Issues in Biomass Combustion

ash contained in biomass has consequences on the handling and the utilisation/disposal of ash residues from biomass combustion plants, and of the mixed ash residues from the co-firing of biomass in coal-fired boilers. Ash related problems when cofiring biomass with coal in PF burners - …

Influence of phosphorous based additives on ash melting

Dec 01, 2017 · To solve the ash related problems during biomass combustion, the combustion process, potassium fixation and ash fusion temperatures of two agricultural biomass briquettes (maize straws and cotton stalks) with phosphorus-based additives (NH4 H 2 PO 4 …

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Influence of additive on ash and combustion

Mar 15, 2020 · Influence of additives on ash and combustion characteristics of biomass under O 2 /CO 2 combustion were studied in this research by experiment and simulation. The alkali metal fixation, potassium transformation mechanism, ash fusion temperatures, thermal and kinetic combustion parameters were systematically investigated.

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(PDF) A Critical Review on Additives to Reduce Ash Related

Minerals such as kaolin and dolomite have been suggested as fuel additives to give the ash a higher melting point.

A Critical Review on Additives to Reduce Ash Related

Jan 01, 2012 · Various additives can mitigate ash related issues by the following possible mechanisms: 1) capturing problematic ash species via chemical adsorption and reactions, 2) physical adsorption and elutriating troublesome ash species from combustion facilities, 3) increasing the biomass ash melting temperature by enhancing inert elements/compounds in ash residues, and 4) restraining biomass ash sintering by diluting and powdering effects from the additives.

Cited by: 133

Ash-related issues during biomass combustion: Alkali

Feb 01, 2016 · A schematic of ash formation and transformation mechanism in biomass combustion is shown in Fig. 2.Similar to pulverized coal combustion , during the combustion of biomass particles and the formation of char particles, volatile organo-metallic compounds (containing Cr, V, etc.) are first released followed by devolatilization; then, partial alkali and alkali-earth elements (e.g., K, Na, and Ca

The influence of ashing temperature on ash fouling and

The slagging tendency and melting degree of these biomass ashes can be aggravated at relatively high ashing temperatures; at higher temperatures it is more likely for biomass ash to reach low-melting point eutectics on the surface of inert particles in the ash (Scala and Chirone 2008).

Alkali metals association in biomass and their impact on

Feb 01, 2020 · The secondary reactions in gas and solid phases taking place during combustion of biomass (high-chlorine content fuel) or co-combustion with coal (high-sulphur content fuel) strongly influence ash melting behaviour and cannot be included in STA . Beside the fact, the method makes some problems in interpretation of biomass ash samples, it can be indirectly helpful in the prediction of slagging and fouling of biomass ash …


Ash content and the melting point of biomass and their mixtures were analyzed in detail in previous studies [8]. Conclusions 1. Reeds are environmentally friendly biofuel sources with average calorific value 18.75 MJ·kg-1 that is slightly less than the calorific value …



Biomass fuels con- tain several substances, including K, Na, S and Cl. During combustion these elements may give rise to molten phases which produce sticky ash particles that adhere to heat transfer surfaces [Werklin 2005]. This can lower the ash melting temperature, enhancing the adhesion efficiency of fly ash particles [Theis 2006].