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    Torrefaction of Pelletized Oil Palm Empty Fruit Bunches

    Ahmad, Arshad, Johari, Anwar, Oladokun, Olagoke
    arXiv.org, May 10, 2015
    © ProQuest LLC All rights reserved, Engineering Database, Publicly Available Content Database, ProQuest Engineering Collection, ProQuest Technology Collection, ProQuest SciTech Collection, Materials Science & Engineering Database, ProQuest Central (new), ProQuest Central Korea, SciTech Premium Collection, Technology Collection, ProQuest Central Essentials, ProQuest One Academic, Engineering Collection (ProQuest)
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    Title: Torrefaction of Pelletized Oil Palm Empty Fruit Bunches
    Author: Ahmad, Arshad; Johari, Anwar; Oladokun, Olagoke
    Contributor: Oladokun, Olagoke (pacrepositoryorg)
    Subject: Calorific Value ; Solid Fuels ; Briquets ; Pyrolysis ; Drying
    Description: The torrefaction of oil palm Empty Fruit Bunch (EFB) briquettes was examined in this study. The results indicate that temperature significantly influenced the mass yield, energy yield and heating value of oil palm empty fruit bunch (OPEFB) briquettes during torrefaction. The solid uniform compact nature of EFB briquettes ensured a slow rate of pyrolysis or devolatization which enhanced torrefaction. The mass yield decreased from 79.70 % to 43.03 %, energy yield from 89.44 % to 64.27 % during torrefaction from 250 {\deg}C to 300 {\deg}C. The heating value (HHV) of OPEFB briquettes improved significantly from 17.57 MJ/kg to 26.24 MJ/kg after torrefaction at 300 {\deg}C for 1 hour. Fundamentally, the study has highlighted the effects of pelletization and torrefaction on solid fuel properties of oil palm EFB briquettes and its potential as a solid fuel for future thermal applications.
    Is part of: arXiv.org, May 10, 2015
    Identifier: 2331-8422 (E-ISSN)

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    Thermogravimetric and Kinetic Analyses of Oil Palm Empty Fruit Bunch (OPEFB) Pellets Using the Distributed Activation Energy Model

    Nyakuma, Bemgba, Ahmad, Arshad, Johari, Anwar, Abdullah, Tuan
    Journal of Physical Science, 2016, Vol.27(3), pp.67-83 [Peer Reviewed Journal]
    © ProQuest LLC All rights reserved, Engineered Materials Abstracts, Solid State and Superconductivity Abstracts, METADEX, Materials Science Database, Advanced Technologies & Aerospace Database, Engineering Database, East & South Asia Database, Publicly Available Content Database, Advanced Technologies Database with Aerospace, Materials Research Database, Technology Research Database, ProQuest Engineering Collection, ProQuest Advanced Technologies & Aerospace Collection, ProQuest Materials Science Collection, ProQuest Technology Collection, ProQuest SciTech Collection, Materials Science & Engineering Database, ProQuest Central (new), ProQuest Central Korea, SciTech Premium Collection, Technology Collection, ProQuest Central Essentials, ProQuest Central China, ProQuest One Academic, Advanced Technologies & Aerospace Index (ProQuest), Materials Science Index (ProQuest), Materials Science Collection (ProQuest), Engineering Collection (ProQuest)
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    Title: Thermogravimetric and Kinetic Analyses of Oil Palm Empty Fruit Bunch (OPEFB) Pellets Using the Distributed Activation Energy Model
    Author: Nyakuma, Bemgba; Ahmad, Arshad; Johari, Anwar; Abdullah, Tuan
    Subject: Pyrolysis ; Reaction Kinetics ; Fruits ; Activation Energy ; Thermal Degradation ; Palm ; Decomposition ; Pellets ; Miscellaneous Sciences (So) ; General and Nonclassified (MD) ; General and Nonclassified (Ep) ; General and Nonclassified (Ed) ; General and Nonclassified (EC) ; Thermogravimetry ; Oil Palm ; Empty Fruit Bunches ; Pellets ; Energy Model;
    Description: The thermal degradation behaviour and decomposition kinetics of oil palm empty fruit bunch (OPEFB) pellets were investigated using a thermogravimetric analyser and the distributed activation energy model (DAEM). The OPEFB pellets were heated from 30°C to 1000°C at three different heating rates (5, 10, 20°C min^sup -1^) under a nitrogen atmosphere. The thermogravimetric-derivative thermogravimetric (TG-DTG) curves revealed that the non-isothermal decomposition of OPEFB pellets occurred in the following three stages: drying (35°C-175°C), active pyrolysis (200°C-370°C) and passive pyrolysis (370°C-1000°C), which resulted in the loss of moisture, volatile matter and char, respectively. The distributed activation energy model was subsequently used to determine the apparent activation energies (E) and pre-exponential factors (A), which ranged from 37.89 kJ mol^sup -1^ to 234.05 kJ mol^sup -1^ and from 2.05 × 10^sup 2^ min^sup -1^ to 3.54 × 10^sup 18^ min^sup -1^, respectively, for conversions...
    Is part of: Journal of Physical Science, 2016, Vol.27(3), pp.67-83
    Identifier: 16753402 (ISSN); 21804230 (E-ISSN); 10.21315/jps2016.27.3.5 (DOI)

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    Thermogravimetric Analysis of Char Waste from the Air Gasification of Empty Fruit Bunch Briquette

    Nyakuma Bemgba Bevan, Mazangi Mojtaba, Johari Anwar, Ahmad Arshad, Tuan Abdullah Tuan Amran
    MATEC web of conferences, 01 July 2014, Vol.13, p.02004 [Peer Reviewed Journal]
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    Title: Thermogravimetric Analysis of Char Waste from the Air Gasification of Empty Fruit Bunch Briquette
    Author: Nyakuma Bemgba Bevan; Mazangi Mojtaba; Johari Anwar; Ahmad Arshad; Tuan Abdullah Tuan Amran
    Subject: Engineering
    Description: The thermal decomposition behavior of char waste produced from the air gasification of Empty Fruit Bunch (EFB) briquette was examined using thermogravimetric analysis (TGA). A comparison between the thermal decomposition behavior of char waste and EFB briquette is also presented. The results indicate that the char waste produced decreased from 22 % to 18 % with increasing temperature from 600 °C to 700 °C during gasification. This is due to the effect of high temperatures on the primary char decomposition reactions. It was observed that char degradation occurs in two steps; char degradation I & II with weight losses of 17 % and 32 % respectively. This showed that only ~ 50 % char was decomposed during thermal analysis, hence higher temperatures are required to ensure complete decomposition. The TGA curve for EFB briquette showed that complete thermal decomposition of EFB briquette occurs in four stages namely; drying, devolatization, reduction and char degradation. The most...
    Is part of: MATEC web of conferences, 01 July 2014, Vol.13, p.02004
    Identifier: 2261-236X (E-ISSN); 10.1051/matecconf/20141302004 (DOI)

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    Torrefaction of Pelletized Oil Palm Empty Fruit Bunches

    Nyakuma, Bemgba Bevan, Ahmad, Arshad, Johari, Anwar, Abdullah, Tuan Amran Tuan, Oladokun, Olagoke
    Cornell University
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    Title: Torrefaction of Pelletized Oil Palm Empty Fruit Bunches
    Author: Nyakuma, Bemgba Bevan; Ahmad, Arshad; Johari, Anwar; Abdullah, Tuan Amran Tuan; Oladokun, Olagoke
    Subject: Physics - Physics And Society
    Description: The torrefaction of oil palm Empty Fruit Bunch (EFB) briquettes was examined in this study. The results indicate that temperature significantly influenced the mass yield, energy yield and heating value of oil palm empty fruit bunch (OPEFB) briquettes during torrefaction. The solid uniform compact nature of EFB briquettes ensured a slow rate of pyrolysis or devolatization which enhanced torrefaction. The mass yield decreased from 79.70 % to 43.03 %, energy yield from 89.44 % to 64.27 % during torrefaction from 250 {\deg}C to 300 {\deg}C. The heating value (HHV) of OPEFB briquettes improved significantly from 17.57 MJ/kg to 26.24 MJ/kg after torrefaction at 300 {\deg}C for 1 hour. Fundamentally, the study has highlighted the effects of pelletization and torrefaction on solid fuel properties of oil palm EFB briquettes and its potential as a solid fuel for future thermal applications. Comment: 5 pages, 2 Figures
    Identifier: 1505.05469 (ARXIV ID)

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    Preliminary torrefaction of oil palm empty fruit bunch pellets

    Nyakuma Bemgba B, Ahmad Arshad, Johari Anwar, Abdullah Tuan Amran T, Oladokun Olagoke, Al-Shatri Ali H, Ripin Adnan, Alir Afizah
    E3S web of conferences, 01 January 2019, Vol.90, p.01014 [Peer Reviewed Journal]