Coal gasification economical option

Both the reformation and gasification options would release significant quantities of carbon during the production process. HjSim allows the user to explore the options for carbon capture, sequestration, and the impact on overall economic competitiveness. Figure 9.6 illustrates the carbon sequestration screen for the coal gasification option. From this screen, the user can specify the additional capital and O M costs associated with the carbon capture, the percentage of carbon removed (default... 

A more recent concept termed mild gasification has also been investigated in detail (Cha et al, 1988 Merriam et al, 1992). The purpose of the process is to produce added-value products (such as high heat content char), which will facilitate removal of impurities and low value materials (such as water), thereby making the economics of shipment more favorable. The process conditions are similar to the low-to-medium temperature carbonization processes and do offer an attractive option for coal use. 

Gasification of coal can produce synthesis gas (syngas) not only from coals having a wide range of heat values but also from low-value carbon feedstocks such as petroleum coke, high-sulfur fuel oil, municipal wastes, and biomass. This flexibility increases the economic value of these resources and lowers costs by providing industry with a broader range of feedstock options. 

---