Chemically Active Fluid Bed for SOx Control: Volume II. Spent Sorbent Processing for Disposal/Utilization

摘要

The report describes the processing of spent calcium-based sulfur sorbents (limestones or dolomites) from an atmospheric-pressure, chemically active fluid bed (CAFB) gasification process, using a regenerative sulfur sorbent process that produces low- to intermediate-Btu gas. Data are developed to provide a basis for evaluating process concepts to minimize the environmental impact (heat release, H2S release, and potential leachates) or possibly for spent sorbent utilization. Flow diagrams and cost estimates were prepared for five processing options.