Saturday, November 8, 2008

Liquifying Coal

In class on Friday, one group presented an article on the process of liquifying coal. I had read a bit about this process in my groups' own article about clean coal and China, but the article did not go very in depth. 

From what i understood from the presentation, liquifying coal is a process that is only in its beginning stages. One of the setbacks of liquified coal is that is a fairly new technology and has not been thoroughly investigated. However, we must look to the future and hope that more can be found out about this process. 

Notes:
-Half of U.S. electricity comes from coal. 
-Liquifying coal would emit less carbon dioxide and mercury.
-BUT, some carbon dioxide would still be emitted.
-Fischer-Tropsch Process-gasified coal converted into  diesel operates best at 150-300 degrees Celsius, but the temperature is kept lower than that to save money and emit less methane, even though using higher temperatures in this process would be more efficient. 
-Tests have only been conducted on a small scale process and would need to be done on a much larger scale in order to really evaluate results and eventually implement the process of liquifying coal.

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