70. Gasification supplies of all fossil fuels are limited Yet, outlook for each

Question

70. Gasification supplies of all fossil fuels are limited Yet, outlook for each of these fuels-for coal, petroleum, and natural reserves of the latter two are measured in terms of a few dozens of gas-is quite different. Our supplies will last hundreds of years. years, while most authorities believe that coal Many efforts, therefore, are now underway, therefore, to find methods for converting abundant coal supplies gaseous and liquid forms These processes are known, respectively, as and into liquefaction of coal First attempts at finding such processes showed that despite being technically possible, it was too the raw expensive to operate gasification on a large scale. The main reason for that is that to have material coal costs much more than natural gas or petroleum. Gasification and liquefaction seemed no future from the economic standpoint. Then the federal government created special funds for research in this field and as a result new approaches to the problem arrived. of them is a process underground gasification. It involves drilling wells into coal deposits and preparing the bed of coal so that it is comprised of small pieces through which gas can flow. Then gasification is initiated in the bed by using steam air or oxygen. of successful gasification processing is the Shell Gasification Process (SGP SGP consists of three main steps: (1) 2 C 2 H20 2 co +2 H2 (2) CO H20 CO2 H2 (3) CO 3 H2- CH4+ H20 Thus coal is converted to a mixture of methane and hydrogen gas both of which are very good fuels. This process has been successfully applied in the Buggenum, plant built in 1993, processing 2000 and Mw of power. addition this process is environmently friendly. The gasification process is currently a very popular subject in applied science. Plenty of modifications in the process have been developed. Certain research efforts devoted to minimizing sulfur pollution from the process, recycling water in the process, and making other modifications that can decrease the cost of gasification so it becomes more and more affordable.

Explanation / Answer

2. carbon capture technology is one of the modern methods of coal gasification.this technique uses less amount of oxygen as the gasification is performed at very high pressure there by making it eco friendly and cost friendly.

3. the modern instrumental techniques employed for gasification are high cost based affairs.

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