Organic geochemistry of Cretaceous Lamza and Chikila coals, upper Benue trough, Nigeria

Jauro, Aliyu; Obaje, Nuhu George; Agho, Michael O.; Abubakar, M.; Tukur, Abdullahi Liman

doi:10.1016/j.fuel.2006.07.031

Cited by 30 publications

(17 citation statements)

References 35 publications

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“…However, there is limited research on the assessment of the power generation potential of some newly discovered coal deposits, and also on their organic petrology and fuel characteristics. Earlier research on Nigerian coals has centred on their metallurgical applications (Akpabio et al 2008;Jauro and Chukwu 2011) along with its rheological and proximate (Ryemshak and Jauro 2013), mineralogical (Adedosu et al 2007;Ogala et al 2012), and geochemical characteristics (Jauro et al 2007;Olajire et al 2007). However, more information is required for the efficient design, operation, and maintenance of coal-fired power plants in Nigeria.…”

Section: Introductionmentioning

confidence: 99%

Petrology, physicochemical and thermal analyses of selected cretaceous coals from the Benue Trough Basin in Nigeria

Akinyemi

Adebayo

Nyakuma

et al. 2020

Int J Coal Sci Technol

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Abundant coal resources that were previously neglected due to a crude oil boom need revitalisation and integration into the national electricity mix to address the energy demands of the Nigerian population. Selected coal samples from the Benue Trough sedimentary basin in Nigeria were examined by various techniques, including proximate and ultimate analyses, organic petrography, Fourier transform infrared ray spectroscopy, and thermogravimetric analysis. Based on vitrinite reflectance, the Lafia-Obi (OLB), Garin Maiganga (GMG), Imiegba (IMG), and Okaba (OKB) coals are classified as subbituminous, while the Lamja1 (LMJ1), Lamja2 (LMJ2) and Chikila (CHK) coals are high volatile B bituminous. The Enugu (ENG) coal is on the boundary between subbituminous and high volatile C bituminous. Organic petrographic results indicate vitrinite and fusinite contents steadily increase from the Lower Benue Trough coals to the Upper Benue Trough coals, while semifusinite and total mineral contents follow a reverse pattern. Thermal decomposition occurred in three stages, i.e., drying, devolatilization, and coke formation above 700°C; and the coal reactivity follows the following order, ENG [IMG[IGH[CHK[LMJ[OKB[GMG[LFB. The higher temperatures (above 900°C) are required to decompose the coals for efficient energy recovery. The LMJ1, LMJ2, OLB, CHK, GMG, and OKB coals can be exploited for electricity power generation. However, the Imeagha and Enugu coals are best suitable for both cement and power generation.

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Section: Introductionmentioning

confidence: 99%

Petrology, physicochemical and thermal analyses of selected cretaceous coals from the Benue Trough Basin in Nigeria

Akinyemi

Adebayo

Nyakuma

et al. 2020

Int J Coal Sci Technol

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“…However, the studies on the fuel properties and potential applications of the newly discovered coals in Nigeria are limited. Nonetheless, research on petrography, rheology, mineralogy, and geochemistry of Nigerian coal has been reported extensively [6][7][8][9][10]. The lack of data on the thermochemical fuel properties of the coals is an impediment to more accurate assessment of their technological applications and efficient industrial utilization [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Chemical and Pyrolytic Thermogravimetric Characterization of Nigerian Bituminous Coals

Nyakuma

Jauro

2016

GeoScience Engineering

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The discovery of new coal deposits in Nigeria presents solutions for nation’s energy crises and prospects for socioeconomic growth and sustainable development. Furthermore, the quest for sustainable energy to limit global warming, climate change, and environmental degradation has necessitated the exploration of alternatives using cleaner technologies such as coal pyrolysis. However, a lack of comprehensive data on physico-chemical and thermal properties of Nigerian coals has greatly limited their utilization. Therefore, the physico-chemical properties, rank (classification), and thermal decomposition profiles of two Nigerian bituminous coals – Afuze (AFZ) and Shankodi-Jangwa (SKJ) – were examined in this study. The results indicate that the coals contain high proportions of C, H, N, S, O and a sufficiently high heating value (HHV) for energy conversion. The coal classification revealed that the Afuze (AFZ) coal possesses a higher rank, maturity, and coal properties compared to the Shankodi-Jangwa (SKJ) coal. A thermal analysis demonstrated that coal pyrolysis in both cases occurred in three stages; drying (30-200 °C), devolatilization (200-600 °C), and char decomposition (600-1000 °C). The results also indicated that pyrolysis at 1000 °C is not sufficient for complete pyrolysis. In general, the thermochemical and pyrolytic fuel properties indicate that the coal from both places can potentially be utilized for future clean energy applications.

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“…Steranes С 29 are dominate. Their presence indicates the influence of higher terrestrial vegetation (Jauro, Obaje, Agho, Abubaker, & Tukur, 2007). The concentration of steranes is higher for reduced samples.…”

Section: Resultsmentioning

confidence: 93%

Possibility of the Implementation of the Principle of Sustainable Development in the Sphere of Coal Processing

2013

CUBR

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High-sulphur coals processing generates a great number of pollutant substances in atmosphere. This study was undertaken to obtain more definite information about the composition of sulphur coal extracts, i.e., on the quality and quantity of dormant Volatile Organic Emissions (VOCs). Analysis of the liquid products was carried out by different protocols of extraction, adsorption chromatography, and GC/MS identification. It should be pointed out that the basic components of coal extracts are polyaromatic hydrocarbons, sulfur-containing compounds and phenols act as a basic factor of environment pollution with carcinogenic products. The complex treatment of these components will permit not only to obtain some valuable chemical products, but also to improve the ecology in the industrial regions. Keywords: coal, extracts, organic emissions, polyaromatic hydrocarbons, GC/MS IntroductionThe sustainable development concept which from the beginning of 90th year dominated in the world community has been officially declared in the document "Global program of actions-the summons for 21st century". This ideology assumes change of priorities at the decision of ecologic-economic commitments.High consumption of the energy and fuels in industry is remarkable in high production of polluting substances which have a great influence not only for human health but also for the vegetation and ecosystem balance (Mastral, Callen, Murillio, Garcia, & Vinas, 1999;Lavrieux et al., 2011).The major part of wastes generated by the industry comes from coal mining, coking plants, power generation, and metallurgy. The considerable part of these waste materials is ejected to atmosphere and groundwater or stored in the conditions of limited area creating the contamination of the environment. During (Mastral, Callen, & Garcia, 2000a; Mastral, Callen, Garcia, & Lopez, 2000b).A pollutant emission depends on the heteroatoms content in the raw material and conditions of coal processing.Within volatile organic emissions, polycyclic aromatic hydrocarbons (PAHs) and their derived compounds are the most carcinogenic. PAHs can get into water and soil being assimilated by the plants, animals, fish, and human body (Mastral, Callen, & Garcia, 2000b).At present, European Union legislation establishes limit values for concentrations of sulphur, nitrogen, and carbon oxides, but there is a lack of similar legislation concerning organic compounds emission.Every year Ukrainian coking plants produce a significant quantity of following waste materials: phenol-containing sewage (30%-40% df), emission into atmosphere (0.7%-0.8% df), and wastes of chemical department (0.10%-0.15% df).The pollutant emission has increased considerably in recent years to the increased use of low-quality coals with high content of sulfur and oxygen.A particular characteristic of seams from Donets coal basin is the occurrence of high-and low-sulfur coals, of the same rank differing by some physicochemical properties (The Donetsk Coal Chemistry Research Institute, 1972). These differences are...

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Organic geochemistry of Cretaceous Lamza and Chikila coals, upper Benue trough, Nigeria

Cited by 30 publications

References 35 publications

Petrology, physicochemical and thermal analyses of selected cretaceous coals from the Benue Trough Basin in Nigeria

Petrology, physicochemical and thermal analyses of selected cretaceous coals from the Benue Trough Basin in Nigeria

Chemical and Pyrolytic Thermogravimetric Characterization of Nigerian Bituminous Coals

Possibility of the Implementation of the Principle of Sustainable Development in the Sphere of Coal Processing

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