The highest mountain in the world is Mount Everest. Its peak rises to 8,848 m (29,028 ft 9 in) â the highest point in the world.
The objective of proximate analysis indicates the percentage by weight of the Fixed Carbon, Volatiles, Ash, and Moisture Content in coal. The amounts of fixed carbon and volatile combustible matter directly contribute to the heating value of coal.
The tars obtained when coal is distilled in horizontal retorts for the production of either gas or coke are sufficiently similar to be classed under the head ing of coal tar.In the manufacture of gas, the coal is often mixed with bog head shale, bituminous lignite, etc., the gas being thereby en riched.hese variations from normal tar are due to the fact that many of the products of distillation are removed from the reaction chamber before the coal has reached its final high temperature. Vertical retort tar, therefore, has some of thv characteristics of low-temperature tar (see TARS, LOW-TEMPERATURE).