Energy Potential Study of Some Tropical Wood Species from Nigeria

Asibor, Jude O.; Akhator, P.E.; Obanor, A.I.

doi:10.9734/cjast/2019/v37i430295

Cited by 4 publications

(9 citation statements)

References 7 publications

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“…The influence of MC on calorific density is complex demonstrated by the resulting polynomial functions of 4 th degree with a correlation coefficient R 2 over 0,9 (Figure 7). The results are comparable to the CD of temperate species briquettes estimated at 9000-24000 MJ/m 3 and that of torrefied wood biomass pellets generally about 19-22 MJ/ m 3 (Asibor et al 2019). Combustion time and moisture content have influenced the rate of energy release, which increase with decrease in moisture content, due to the shorter time necessary for combustion of dried samples.…”

Section: Discussionsupporting

confidence: 77%

“…The tropical wood species contain around 43,5% cellulose, 65,5% hemicellulose and 30,36% lignin, as reported by Acuña-Alegria et al (2018). Their lignin content is considerably higher than of European trees with about 17,6% which have average cellulose content of 45%, 6% hemicellulose and 25% lignin (Asibor et al 2019). The main elemental chemical components of tropical wood species (48,9% C (carbon), 6,8% H (hydrogen) and 44,3% O (oxygen) might have a positively contribution to the higher calorific value, with about 8,6% compared to European wood species (45% C, 6% H and 42% O).…”

Section: Discussionmentioning

confidence: 64%

“…Lower forest capacity/productivity was reported for oak, less than 3,5-7 t/ha/year (2,6-5,2 m 3 /ha/year) (Asibor et al 2019). The tropical wood species can produce more wood per ha reaching 25-30 t/ha/year, thus resulting 5,3-6,3x10 5 MJ/ha for Afromosia and 4,7-5,6 x 10 5 MJ/ha for Acajou spp.…”

Section: Discussionmentioning

confidence: 82%

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Evaluation of the calorific values of wastes from some tropical wood species

Lunguleasa

Spirchez

Zeleniuc

2020

Maderas, Cienc. tecnol.

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The paper aims to analyze and classified some exotic wood species from tropical Africa, on regard to calorific features, in order to view the ability of their biomass to be a solid, natural and renewable fuel. The calorific values of wood wastes of eight tropical species were determined using an oxygen bomb calorimeter. The tested specimens were conditioned at a moisture content of 10%, 20%, and 50%. The influence of moisture content on calorific value and density, heat release rate and calorific efficiency were also analyzed. The biggest high calorific value and low calorific value were obtained by Guaiac and Rose species (21200-20700 kJ/kg). Acajou had the lowest values of high calorific value and low calorific value (18929 and 18456 kJ/kg, respectively). For higher wood density (Guaiac) the higher calorific density was obtained. The moisture content of specimens had negatively influenced the calorific efficiency and rate of energy release. The ash content was below 4% with highest values for Guaiac (3,6%) and the lowest for Acajou (0,5%). The results showed that the analyzed tropical wood species had a forest calorific capacity with 23-47% higher than of European beech, thus can be considered a good potential as renewable energy resources.

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Section: Discussionsupporting

confidence: 77%

Section: Discussionmentioning

confidence: 64%

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Evaluation of the calorific values of wastes from some tropical wood species

Lunguleasa

Spirchez

Zeleniuc

2020

Maderas, Cienc. tecnol.

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“…This has allowed evaluating the feasibility of electricity auto-generation from wood waste generated at the wood transformation unit (WTU). Laboratory results together with information from previous studies [22] provided input data for modelling of power generation by a gas turbine using Cycle-Tempo thermodynamic software [25].…”

Section: Methodsmentioning

confidence: 99%

“…The absence in Cameroon of a national bioenergy policy, which would serve as an umbrella for the exploitation of this untapped bioenergy resource and that would lead to wealth creation especially in rural areas, has contributed greatly to the misconception, mismanagement and neglect expressed towards sawdust and waste in general. Also, the lack of adequate data relative to the energy potential of local wood species [22] has been noted as a key hindrance to the development of bioenergy in Cameroon [4,16]. Moreover, the scarcity of relevant information especially at a decentralised level has not encouraged rural development schemes to manage and harness this resource sustainably.…”

Section: Introductionmentioning

confidence: 99%

Potentials of sustainable electricity production from sawdust by small-scale wood transformation units: a case study in Cameroon

Veeyee

Bup

Boldor

et al. 2020

Int J Energy Environ Eng

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Wood processing produces large volumes of residues which, when not properly managed, pose an environmental problem in the vicinity and beyond. These residues mainly constituted of sawdust and wood shavings, possess important energy potentials that are largely underexploited in Cameroon. In this work, we investigate the possibility that sawdust generated by wood transformation units (WTU) in Cameroon can be used sustainably to render them self-sufficient in terms of electricity demands through the production of syngas in a gasification process. Both qualitative and quantitative methods are used in the research. Initially, a questionnaire was employed to quantify the sawdust produced in the town of Yaounde, Cameroon. A major WTU "LFM_Sciérie" was selected to evaluate the feasibility of electricity generation from syngas produced by gasification of its wood waste. Proximate analysis of sawdust sampled from the LFM sawmill included moisture content 17.74 ± 0.27%, ash content 3.91 ± 1.54%, volatile matter 74.62 ± 1.47%, and fixed carbon 3.73%. The gross calorific value of the sawdust sample was estimated to be 20.08 MJ/kg. The total quantity of sawdust produced in the Yaounde municipalities is 290 tons/week which translates to an energy potential of 713 GJ/week. Theoretical calculations and modelling using a thermodynamics software, Cycle-Tempo, indicate that the amount of sawdust generated at the LFM sawmill of about 7 tons/ week, can conveniently satisfy its electricity demands of approximately 3.3 MW/week. Small-scale WTUs in Yaounde can be rendered energy-autonomous by the generation of electricity from syngas produced via a gasification process of its waste.

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