Coal Chemistry and Technology Essay example -- Coal Research Paper

1.ember formation burn was formed from remains of plants from some(prenominal) hundred millions years ago partially decomposed. These remains were settled in regions where waterlogged or swampy regions prevailed. These conditions avoid complete decomposition making thinkable the gradual peat formation. Peat is not considered sear actually, but is an essential step to coal formation. This formation process is called coalification and it is essentially a progressive change from peat to anthracite way out through different types of coals. This process not only depends on the time, but also on temperature and burial pressure (Speight 1983). Schematic representation of the coalification process (Speight 1983) 2.Coal ClassificationCoals can be classified by its rank. The rank of the coal can be defined as the degree of alteration that coal experiments during the coalification. On the one hand there are Lignite and sub-bituminous coals which are Low rank coals. These have a lower conte nt in Carbon, are lighter and have higher moisture levels. On the other hand there is Bituminous coals and Anthracite which are high rank coals. They have a higher content in carbon which means they have more energy content. They have lower moisture levels and a more vitreous look (University of Kentucky, 2012). 3.Coal CompositionCoal is an organic sediment which can be described in several ways. The most common way is in impairment of the elemental composition. J. G. Speight, (1991) suggested that coal can classified on the basis of the general formula Cn Hm Nx Oy Sz (where n, m, x, y and z are number of atoms of each element)Coal is not a homogeneous material. It is heterogeneous and is contaminated by different types of impurities w... ...rcel Dekker Inc.Classification and Rank of Coal. University of Kentucky. (2012). ONLINE Available at http//www.uky.edu/KGS/coal/coalkinds.htm. Accessed 12 November 13.Couch G. R, (1991). march on coal cleaning technology IEA Coal Research. (IEACR/44)Vernon J.L, Jones T, (1993) Sulphur and Coal. London IEA Coal Research (IEACR/57)Ryan, B, Ledda L, (1997). A review of sulphur in coal with specific part to the telkwa deposit, North-western british Columbia. Geological Fieldwork, Paper 1998, Pages 1-10Morrison G. F, (1981). Chemical desulphurisation of coal IEA Coal Research. (ICTIS/TR15)Blzquez B.L, Ballester A, Gonzlez F, Mier J.L, (1991). Desulfuracin de Carbones, la biodesulfuracin como alternativa. Minera del Carbn. Pages 40-49Morrison G. F, (1982). Control of sulphur oxides from coal burn IEA Coal Research. (ICTIS/TR15)