United coal gasification technologies

This process is one of the three commercially practiced processes for the production of acetic anhydride. The other two are the oxidation of acetaldehyde [75-07-0] and the carbonylation of methyl acetate [79-20-9] in the presence of a rhodium catalyst (coal gasification technology, Halcon process) (77). The latter process was put into operation by Tennessee Eastman in 1983. In the United States the total acetic anhydride production has been reported to be in the order of 1000 metric tons. 

Coal gasification technologies can be classified according to the flow configuration of the gasifier unit. The primary configurations are ... 

Hitachi. This coal gasification technology is based on an oxygen-blown entrained flow gasifier, where the majority of experience has been gained in a 150 ton coal/day unit. The gasifier is a water-cooled tube that is lined by a high-temperature-resistant castable. Pulverized coal is pneumatically... 

In this report, a demonstration project is one in which a unit using the new coal gasification technology has successfully operated, is operating, or is under construction to process at least 500 t/d of coal (dry basis). This minimum size should demonstrate the feasibility of constructing a commercial plant by replication or minor upscaling of the gasifier. 

Building large commercial coal gasification combined cycle units could be difficult based on the history traditional power generators have had with simpler chemical processes. Sequesting the C02 can be another technological challenge. 

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