PRODUCT ANALYSIS FROM THE OPERATION OF A 10 TON/DAY, DIRECT, FLUIDIZED BED, BIOMASS GASIFIER AND HGCU SYSTEM

摘要

A Molecular Beam Mass Spectrometer was successfully interfaced with a high temperature/pressure, PDU scale biomass gasifier, hot gas conditioning and cleanup unit operations. We demonstrated the instrument's ability to continuously sample from the process and measure multiple products simultaneously. Statistical analysis of the calibration standards data demonstrated that the TMBMS response to the analytes was linear and very precise over the range of 10-1000 ppm. Excellent instrument calibration stability was achieved over a period of five days and the standard addition tests revealed no sample matrix effects on the calibration of the TMBMS for these analytes. The identification and explanation of the process fluctuations and the feeder system operational change described above, as well as other transient phenomena, was facilitated by the on-line multi-species detection capabilities of the TMBMS. The TMBMS process gas measurements showed that the HGCU was not affecting the tar species concentrations, implying that coking would not be a problem. Analysis of the candle filters at Westinghouse showed no evidence of carbon deposition within the filters, confirming our conclusion.