The biggest problem in effective utilization of Indian coals has all along been its high mineral content. Coal liquefaction and gasification being capital intensive, the returns so far have come from washing the coal, where a trade off is made between the floats, meddling and rejects. In this context, new initiatives have been taken at the IIT Delhi resulting in solubilization of the major part of the coal substance by extraction at the atmospheric pressure with combinations of polar organic solvents which are recycled. The extract is zero ash and can be treated as organic feedstock for further processing. This process has been termed as organo-refining of coals. The extract is almost zero ash and can be treated as organic feed stock for further processing. This reason has led to the development of clean coal Technology which may be useful for the coal based power generation and for steel power plants. Bioleaching and biosolubilization have been found suitable to dimineralise the coal.
Other activities of this group include
- • Conversion of coal to liquid,
- • Utilization of coal extracts for value added end-uses such as a chemical feedstock,
- • Conversion of the products of coal gasification to synthetic natural gas methane and to provide alternative energy transport systems.
- • Coke making
- • Coal Delsulphurization coal cleaning
- • Oil from waste and
- • Hydrocarbon extraction from energy plantation and other alternative routes
- • Control of pollution from fuel firing – CPCB has set norms basing on this at 150mg/Nm3.
- • Perfected the technology of Incineration.