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Evaluation of the Pyrolysis and Gasification Kinetics of Tropical Wood Biomass
Högskolan i Borås, Institutionen Ingenjörshögskolan.
Högskolan i Borås, Institutionen Ingenjörshögskolan.
2014 (Engelska)Ingår i: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 9, nr 2, s. 2179-2190Artikel i tidskrift (Refereegranskat) Published
Hållbar utveckling
Innehållet faller inom området hållbar samhällsutveckling
Abstract [en]

Two tropical biomass species, teak (Tectona grandis) and obobo (Guarea thompsonii), were obtained in the form of sawmill waste from Nigeria and evaluated to determine their potential for gasification. Pyrolysis and gasification kinetics of the samples were investigated using a thermogravimetric analyser (TGA) at temperatures of 900 oC and 1,000 oC. Four iso-conversional methods, one peak temperature method, and two model-fitting methods were employed to determine the kinetic parameters, i.e. the apparent activation energy Ea, and pre-exponential factor A. Values of the gasification kinetic rate constant K were determined using two gas-solid reaction models: the volumetric reaction model (VRM) and the shrinking core model (SCM). The values obtained for all three kinetic parameters showed good agreement with values derived for samples of non-tropical wood.

Ort, förlag, år, upplaga, sidor
North Carolina State University , 2014. Vol. 9, nr 2, s. 2179-2190
Nyckelord [en]
Pyrolysis, Pyrolysis, Kinetic parameters, Tropical biomass
Nationell ämneskategori
Energiteknik
Forskningsämne
Resursåtervinning
Identifikatorer
URN: urn:nbn:se:hb:diva-1865ISI: 000336960700028Lokalt ID: 2320/13742OAI: oai:DiVA.org:hb-1865DiVA, id: diva2:869943
Tillgänglig från: 2015-11-13 Skapad: 2015-11-13 Senast uppdaterad: 2017-12-01
Ingår i avhandling
1. Investigating the Reaction Kinetics of Tropical Wood Biomass: A Prospect for Energy Recovery
Öppna denna publikation i ny flik eller fönster >>Investigating the Reaction Kinetics of Tropical Wood Biomass: A Prospect for Energy Recovery
2016 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
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.

Ort, förlag, år, upplaga, sidor
Borås: Högskolan i Borås, 2016. s. 70
Serie
Skrifter från Högskolan i Borås, ISSN 0280-381X ; 77
Nyckelord
Wood, Pyrolysis, gasification, char, kinetic parameters, SEM-EDX, AAEM
Nationell ämneskategori
Teknik och teknologier
Forskningsämne
Resursåtervinning
Identifikatorer
urn:nbn:se:hb:diva-9334 (URN)978-91-88269-10-2 (ISBN)978-91-88269-11-9 (ISBN)
Disputation
2016-04-29, in room E310,, University of Borås, Allegatan 1, Borås, Sweden, Borås, 10:00 (Engelska)
Tillgänglig från: 2016-04-07 Skapad: 2016-03-08 Senast uppdaterad: 2016-04-07Bibliografiskt granskad

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http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_2_2179_Oluoti_Pyrolysis_Gasification

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