煤的元素组成（Elemental composition of coal）.docVIP

煤的元素组成（Elemental composition of coal） 1. carbon and hydrogen Carbon is the most important ingredient in coal. The carbon content (Cr) increased with the degree of coalification. Peat Cr 50 ~ 60% to 60 ~ 77% lignite coal as 74 ~ 92% anthracite is 90 ~ 98%. in the same degree of coalification of coal, vitrinite Cr highest vitrinite group. The stable group was the lowest. hydrogen Coal in second important elements. The hydrogen content of the sapropelic coal plant coal (HR) higher than the rot, generally more than 6%, sometimes up to 11%, which is due to lower organisms. In the formation of hydrogen rich sapropelic humic coal, the stable group had the highest HR, vitrinite group, silk was the lowest. With the increasing degree of coalification, their HR were gradually reduced. 2. n The nitrogen in coal is mainly converted from the proteins in coal forming plants. It is thought that the nitrogen in coal is usually organic nitrogen, some of which are hetero rings NR in coal is usually about 0.8 to 1.8%, but also with the degree of coalification rises slightly decreased. Chinas weak caking coal and non caking bituminous NR is lower than 1%, probably in the peat stage by oxidation in different degree, protein oxidation of coal plants in the decomposition, so NR is generally low. 3. oxygen Oxygen is one of the main elements in coal, the total composition and morphology in the presence of oxygen in coal directly affects the properties of coal and coal coal to the elemental composition of organic matter as the main body, which is mainly organic carbon, hydrogen, oxygen, nitrogen and other elements. There are ten kinds of elements in coal, but usually the elements of coal are mainly composed of five elements, namely carbon, hydrogen, oxygen, nitrogen and sulfur. In the coal content is very small, a large variety of other elements, generally not as the elements of coal composition, and only as the coal associated elements or trace elements. I. carbon in coal It is generally bel