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EXPERIMENTAL/ENGINEERING SUPPORT FOR ENVIRONMENTAL PROTECTION AGENCIES FLUIDIZED-BED COMBUSTION (FBC) PROGRAM: FINAL REPORT. VOLUME I. SULFUR OXIDE CONTROL
Citation:
Ulerich, N., W. Vaux, R. Newby, AND D. Keairns. EXPERIMENTAL/ENGINEERING SUPPORT FOR ENVIRONMENTAL PROTECTION AGENCIES FLUIDIZED-BED COMBUSTION (FBC) PROGRAM: FINAL REPORT. VOLUME I. SULFUR OXIDE CONTROL. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/7-80/015A.
Description:
The report gives results of an investigation of the desulfurization performance and attrition behavior of limestone and dolomite sorbents for atmospheric and pressurized fluidized-bed combustion (FBC) systems used with coal. It gives results of experimental thermogravimetric analyses (TGAs) of the kinetics of SO2 capture by sorbents, and discusses the further development and application of a kinetic model for desulfurization, based on TGA results. It also gives results of a basic assessment of sorbent attrition mechanisms in FBC, including some laboratory experimental tests. Some conclusions from this work are: (1) pressurized FBC systems can achieve effective SO2 removal at high temperatures (1000 C) or high excess air (300%) without an increase in sorbent requirements over lower temperature/excess air cases; (2) the agreement between actual FBC data and the TGA-based desulfurization model has been further demonstrated, using data from both atmospheric and pressurized FBCs; and (3) sorbent attrition screening tests indicate that sorbent type and FBC operating parameters will affect particle attrition. The report presents an experimental-data-supported sorbent attrition model for the bubbling bed regime in an FBC.