Keywords: Nigerian coal, South African coal, Coal fly ash, Major oxides, Trace elements, Mineralogy. 1. INTRODUCTION Coal is a combustible carbonaceous rock that contains varying amounts of carbon, hydrogen, nitrogen, oxygen, sulphur and mineral matter and nearly 8 gigatonnes per year of coal is produced globally at ∼0.05 $/kg) [1]. It is an
10%The instrumental neutron activation analysis (INAA) technique has been used to determine 17 major, minor, and trace elements in samples of the three major sources of Nigerian coal. The NBS Standard Reference Material, Coal SRM 1632, was also analyzed, for the purpose of verifying the accuracy of the method. The results obtained with it were in good …
The patterns of ten rare earth elements (La, Ce, Nd, Sm, Eu, Gd, Tb, Dy, Yb and Lu) determined by instrumental neutron activation analysis (INAA) for coals obtained from eight coal mines in ...
The elemental composition is a needed factor in evaluating the process of chemical conversion and pre- dicting the flow of flue gas and the quality of air in coal combustion (Nhuchhen 2016). The proximate analysis is a fuel property that provides for the chemical composition of coal and confirms the appropriate usage of coal.
Ultimate analysis was carried out to determine the elemental composition of some Nigerian coal samples viz: Garin Maiganga (GMGA3 – top layer and GMGB – base layer), Chikila (CHK), Lamza (LMZ) and Afuzie (AFZ); in order to ascertain their ranks for
In the quest for a search of a suitable coal deposit of metallurgical importance, the qualities of three Nigerian coal samples, Lafia-Obi, Doho and Lamja, were assessed for possible utilization in metallurgical coke production. Several parameters that determine coking quality, such as moisture content, ash, volatile matter, free swelling index, sulphur content, Gray-King coke …
The results show that Nigerian coals are of weak or noncoking grades with low sulphur (0.52-2.04%) and high hydrogen (3.7-6.60%) contents. The coals possess properties which make them suitable feedstocks in gasification processes. They may also be used as blends with coking coals for sintering.
a-Obi coal samples gave an improved and satisfactorypercentage stability and friabilityfor semicokes. In the search for a Nigerian coking coal, Aderonpe [] carried out the assessment of blends of high volatile (% %) bituminous coals with low volatile ( < %) bituminous coals. In another investigation, Onyeama and Okaba coals
energy supplies. If the indigenous coal deposits can be explored and exploited, Nigerian economy can be diversified, leading to a smooth industrial and technological transition from the present petroleum based economy [2]. Coking coal is a coal that softens, fuse and re-solidify when heated to form the carbon-rich material called coke.
The elemental composition of coal and biomass provides significant parameters used in the design of almost all energy conversion systems and projects. The laboratory tests to determine the elemental composition of coal and biomass is time-consuming and costly. However, limited research has suggested that there is a correlation between parameters …
PDF | On Aug 1, 1984, A. H. M. A. Hannan and others published Determination of trace elements in Nigerian coals by neutron activation analysis | Find, read and cite all the research you need on ...
3.2. Ultimate Analysis. Results obtained from the ultimate analysis carried out on the five coal samples were evaluated on air-dried basis. Oxygen was calculated by difference on an air-dried basis using ().The elemental composition of carbon, hydrogen, nitrogen, sulphur, and oxygen in the coal samples is shown in Table 2.The percentages of the elemental carbon of Odagbo, …
Apart from the Ihioma-Orlu coals with a high Al content of 1.7%, Lafia coal has the highest content of the elements Fe, AI, Ca, K, Mg, Na and Ti. It is observed that, in general, the Fe contents of Nigerian coals is high with the exception of coals from Enugu and Onyeama deposits. This quality is known to have a bearing on the fusion ...
HUNGARIAN JOURNAL OF INDUSTRY AND CHEMISTRY Vol. 43(2) pp. 91–95 (2015) hjic.mk.uni-pannon.hu DOI: 10.1515/hjic-2015-0015 MINERAL MATTER IN NIGERIAN COALS AND TAR SAND AND THEIR
PDF | On Aug 1, 1984, A. H. M. A. Hannan and others published Determination of trace elements in Nigerian coals by neutron activation analysis | Find, read and cite all the research you need on ...
elements in the coal samples shows that Benue and Enugu coals are in the rank of sub-bituminous coal while Delta coal belong to the lignite or brown coal. This elemental analysis shows that Enugu and Benue coal deposits are of higher economic value that Delta coal deposit.
The Nigerian Coal Corporation was established in 1950 and it is owned by the FGN. The headquarter is located at No 25 Okpara Avenue, Enugu. SECTOR DATA. Coal exploration in Nigeria started as far back as 1916. Available data show that coal (mainly sub-bituminous stream coals except for the Lafia-Obi bituminous coking coal) is available in ...
This study is aimed at investigating the physicochemical properties of low rank Nigerian coals. The coal samples were examined using bomb calorimetry, ultimate and proximate analyses to determine the heating value, elemental composition and physicochemical properties. The calorific values of the coals were; 23.74 MJ/kg for GMG; 27.34 MJ/kg for SKJ …
Coal, a solid fuel is composed primarily of carbon along with variable quantities of other elements, chiefly hydrogen, sulphur, oxygen, nitrogen as well as trace amounts of other elements including mineral matter [1].
The instrumental neutron activation analysis (INAA) technique has been used to determine 17 major, minor, and trace elements in samples of the three major sources of Nigerian coal. The NBS Standard Reference Material, Coal SRM 1632, was also analyzed, for the purpose of verifying the accuracy of the method. The results obtained with it were in good agreement with …
Most Nigerian coal has been reported to be non-coking except for Obi-Lafia coal [10]. Nearly in all studied reported on Nigeria coals, the evaluation of combustion properties have been limited to the deter- mination of proximate, ultimate and calorific values [12].