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Investigation of the Reaction Behavior of Albizia gummifera Wood under Steam Gasification with Varied Partial Pressures and Gasification Temperatures
University of Borås, Faculty of Textiles, Engineering and Business. Lagos State University. (Resource Recovery)ORCID iD: 0000-0002-7351-9677
2016 (English)In: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 2016, no 11, 3736-3751 p., 2Article in journal (Refereed) Published
Sustainable development
The content falls within the scope of Sustainable Development
Abstract [en]

The astronomical increase in global energy demand makes locating energy sources other than fossil fuels worthwhile. The use of tropical biomass wood waste as a renewable energy source was investigated in this study. The thermal conversion analysis of Albizia gummifera (ayinre) was carried out in a thermobalance reactor via steam gasification under varying temperature (700 to 1000 °C) and steam partial pressure (0.020 to 0.050 MPa). The experimental data was evaluated using three gas-solid reaction models. The modified volume reaction model (mVRM) gave the overall highest coefficient of determination (0.9993) and thereby the best conversion prediction. The observed char activation constant rates (from paired reaction conditions) indicated, on average, an increase in reactivity as the parameters increased. The results showed that the activation energy of the mVRM gave the lowest value (32.54 kJ/mol) compared with those of the shrinking core model (SCM) and the volume reaction model (VRM) (49.29 and 49.89 kJ/mol, respectively).

Place, publisher, year, edition, pages
North Carolina: University of North Carolina Press, 2016. Vol. 2016, no 11, 3736-3751 p., 2
Keyword [en]
Steam gasification; Tropical biomass; Kinetic parameters; Albizia gummifera; Gas-solid reaction models
National Category
Engineering and Technology
Research subject
Resource Recovery
URN: urn:nbn:se:hb:diva-9324DOI: 10.15376/biores.11.2.3736-3751OAI: diva2:909954
Available from: 2016-03-07 Created: 2016-03-07 Last updated: 2016-04-07Bibliographically approved
In thesis
1. Investigating the Reaction Kinetics of Tropical Wood Biomass: A Prospect for Energy Recovery
Open this publication in new window or tab >>Investigating the Reaction Kinetics of Tropical Wood Biomass: A Prospect for Energy Recovery
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The utilization of wood biomass for energy recovery purposes is a phenomenon that is increasingly attracting attentions from researchers, companies and countries all over the world. The effect of climate change as largely represented by global warming leading to glacier ice melting and an unprecedented rise in sea level is a worrisome development. One of the causal agents of this scenario is the increase in world’s greenhouse gas emission. A sure method of approach to ending the problem is to drastically reduce the emission level to the barest minimum, or to zero level if possible. Wood biomass conversion via thermal treatment is an activity capable of reducing the emission possibility as the CO2 released during the conversion is effectively taken care of. Another benefit derivable from the conversion is taking care of what otherwise would have been termed a waste and treated as such. The envisaged use of wood resource to solve the lingering power problem in Nigeria is an effort in the right direction.

The thesis highlights the conversion processes, as well as the reaction kinetics involved. Reaction parameters such as temperature, heating rate, partial pressure, and flow rate were investigated for the purpose of identifying their effect on the conversion processes. The typical kinetic parameters obtained during the conversion processes would be of high importance in the design and configuration of reactors meant for the optimum conversion of wood waste biomass as a valuable resource. With the non-tropical wood biomass already deployed for energy conversion in the developed countries, the similarity in the trend as regards conversion reactions (char formation and

conversions, kinetic parameters) compared to the tropical counterpart is a welcome development. This suggests the candidacy of non-tropical wood biomass for energy recovery purposes as a viable one.

Place, publisher, year, edition, pages
Borås: Högskolan i Borås, 2016. 70 p.
Skrifter från Högskolan i Borås, ISSN 0280-381X ; 77
Wood, Pyrolysis, gasification, char, kinetic parameters, SEM-EDX, AAEM
National Category
Engineering and Technology
Research subject
Resource Recovery
urn:nbn:se:hb:diva-9334 (URN)978-91-88269-10-2 (ISBN)978-91-88269-11-9 (ISBN)
Public defence
2016-04-29, in room E310,, University of Borås, Allegatan 1, Borås, Sweden, Borås, 10:00 (English)
Available from: 2016-04-07 Created: 2016-03-08 Last updated: 2016-04-07Bibliographically approved

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Oluoti, Kehinde
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