Coals assault on human health physicians for social responsibility. Chapter 2 the role of coal in energy growth and co2 emissions. However, the most common process chain is coal to liquid fuels ctl. Human and ecological risk assessment of coal combus tion wastes.
Direct coal liquefaction converts coal to a liquid by dissolving coal in a solvent at high temperature and pressure. Potential for coal mine methane extraction and utilisation. Further interaction between cil and oil is going on the business initiatives of coal liquefaction project through joint task force. Coal liquefaction is the process of converting coal to liquid fuels. During the period of 19141925, the process was refined and i. Brown coal liquefaction technology bcl technology overview 1. This process is highly efficient, but the liquid products require further refining hydrocracking or adding hydrogen over a catalyst to achieve high grade fuel characteristics. This process is often known as coal to x, where x can be many different hydrocarbonbased products. An introduction to coal quality usgs publications repository. A comparison of direct and indirect liquefaction technologies for. Coal liquefaction is a process of converting coal into liquid hydrocarbons.