Evaluating the Energy Recovery Potential of Nigerian Coals under Non-Isothermal Thermogravimetry

International Conference on Materials Technology and Energy

Bevan Nyakuma, Bemgba^1,2 ; Oladokun, Olagoke^1,2 ; Jauro, Aliyu^3 ; Damian Nyakuma, Denen^4

Centre of Hydrogen Energy, Institute of Future Energy, Universiti Teknologi Malaysia, Skudai, Johor Baru

81310, Malaysia^1

Department of Chemical Engineering, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Skudai, Johor Baru

81310, Malaysia^2

National Centre for Petroleum Research and Development (NCPRD), Abubakar Tafawa Balewa University, P.M.B 0248, Bauchi State

740272, Nigeria^3

Directorate of ICT, University of Calabar, P.M.B 1115, Calabar, Cross River State

540271, Nigeria^4

关键词: Calorimetric analysis;    Energy recovery;    Fuel properties;    Higher heating value;    Non-isothermal thermogravimetry;    Temperature profiles;    Thermal conversion;    Volatile matters;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/217/1/012013/pdf
DOI  :  10.1088/1757-899X/217/1/012013

来源: IOP

【 摘 要 】

This study investigated the fuel properties and energy recovery potential of two coal samples from Ihioma (IHM) and Ogboligbo (OGB) environs in Nigeria. The ultimate, proximate, and bomb calorimetric analyses of the coal were examined. Next, the rank classification and potential application of the coals were evaluated according to the ASTM standard D388. Lastly, thermal decomposition behaviour was examined by non-isothermal thermogravimetry (TG) under pyrolysis conditions from 30 - 900 °C. The results indicated IHM and OGB contain high proportions of combustible elements for potential thermal conversion. The higher heating value (HHV) of IHM was 20.37 MJ/kg whereas OGB was 16.33 MJ/kg. TG analysis revealed 55% weight loss for OGB and 76% for IHM. The residual mass was 23% for IHM and 44% for OGB. Based on the temperature profile characteristics (TPCs); Ton, Tmax, and Toff, IHM was more reactive than OGB due to its higher volatile matter (VM). Overall, results revealed the coals are Lignite (Brown) low-rank coals (LRCs) with potential for electric power generation.