Carbon Dioxide Capture from Flue Gas Using Dry, Regenerable Sorbents. (Quarterly Report, July 1, 2005-September 30, 2005)

摘要

This report describes research conducted between July 1, 2005, and September 30, 2005, on the use of dry regenerable sorbents for removal of carbon dioxide (CO2) from flue gas from coal combustion. A new batch of supported sorbent containing 10% sodium carbonate (Na2CO3) was obtained and characterized. Thermogravimetric analysis (TGA) testing confirmed that the Na2CO3 sorbent reacted with sulfur dioxide (SO2) at temperatures between 40 and 160DGC. Although the rate of reaction was more rapid at lower temperatures, these data suggest that SO2 will not be released from the sorbent under expected sorbent-regeneration conditions. Preliminary work has been conducted to establish the design specifications for a laboratory screw-conveyor sorbent regeneration/cooling apparatus. A plan for a scheduled pilot-scale test of a heated hollow-screw conveyor was developed. This test will be conducted at facilities of the screw conveyor fabricator. This test will confirm the extent of sorbent regeneration and will provide data to evaluate multi-cycle sorbent attrition rates associated with this type of processing.