Comparison of CO2 and steam gasification reactivity of algal and woody biomass chars

Kawnish Kirtania, Janik Steven Joshua, Mohd Asyraf Kassim, Sankar Bhattacharya

Research output: Contribution to journalArticleResearchpeer-review

Abstract

This study undertook gasification reactivity measurement of an algal biomass (Chlorella sp.) char prepared in two different reactors with two gasifying agents (CO2 and steam) and compared that with similar measurements on woody biomass (commercial wood mix) char in a thermo-gravimetric analyser at three different temperatures. In general, the woody char from entrained flow reactor showed higher reactivity during gasification. At 800 °C and 950 °C, similar reactivity was exhibited by algal char from thermo-gravimetric analyser whereas at 1100 °C, the woody char became more reactive than the algal char. For algae, the char prepared in entrained flow reactor showed lower reactivity than the char from thermo-gravimetric analyser. The scanning electron microscope images of the char samples showed significant difference in morphology with respect to the char preparation condition and species. For chars of both the species, a temperature of 800 °C and time of around 20 min are found to be sufficient to accomplish most conversion; this information is of practical relevance.
Original languageEnglish
Pages (from-to)44 - 52
Number of pages9
JournalFuel Processing Technology
Volume117
DOIs
Publication statusPublished - 2014

Cite this

Kirtania, Kawnish ; Joshua, Janik Steven ; Kassim, Mohd Asyraf ; Bhattacharya, Sankar. / Comparison of CO2 and steam gasification reactivity of algal and woody biomass chars. In: Fuel Processing Technology. 2014 ; Vol. 117. pp. 44 - 52.
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abstract = "This study undertook gasification reactivity measurement of an algal biomass (Chlorella sp.) char prepared in two different reactors with two gasifying agents (CO2 and steam) and compared that with similar measurements on woody biomass (commercial wood mix) char in a thermo-gravimetric analyser at three different temperatures. In general, the woody char from entrained flow reactor showed higher reactivity during gasification. At 800 °C and 950 °C, similar reactivity was exhibited by algal char from thermo-gravimetric analyser whereas at 1100 °C, the woody char became more reactive than the algal char. For algae, the char prepared in entrained flow reactor showed lower reactivity than the char from thermo-gravimetric analyser. The scanning electron microscope images of the char samples showed significant difference in morphology with respect to the char preparation condition and species. For chars of both the species, a temperature of 800 °C and time of around 20 min are found to be sufficient to accomplish most conversion; this information is of practical relevance.",
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Comparison of CO2 and steam gasification reactivity of algal and woody biomass chars. / Kirtania, Kawnish; Joshua, Janik Steven; Kassim, Mohd Asyraf; Bhattacharya, Sankar.

In: Fuel Processing Technology, Vol. 117, 2014, p. 44 - 52.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Kassim, Mohd Asyraf

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