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A 32-month gasifier mechanistic study and downstream unit process development program for the pressurized ash-agglomerating fluidized bed gasification system: Quarterly report, April 1-June 30, 1985

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The design report for the KRW external hot gas cleanup system is in progress. The second air-blown gasifier PDU test for evaluation of in-bed desulfurization was completed. Gasifier operability with in-bed desulfurization was demonstrated by successful operation of the PDU. This success was attributed to improved operation of the dolomite feeder, operational flexibility of the modified ash annulus gas distributors, and specific gasifier startup and transition strategies. The solid wastes discharged from the PDU gasifier during in-bed desulfurization testing include a mixture of agglomerate ash and spent sorbent. The spent sorbent (calcium sulfide) can be converted to calcium sulfate during the in-bed desulfurization process. This is a chemical reaction which minimizes the reactive waste's hazardous properties. Disposal studies and characterization of the PDU reactive wastes were initiated. In addition, process performance was analyzed in terms of gasification rate and product gas composition for selected PDU tests. Work continued to develop process models to enhance predictions of gasifier performance. An evaluation of PDU test data (1983 to 1985) is in progress to compare PDU fines collection and recycle performance based on isokinetic solids measurements versus predicted values. Preliminary results suggest that further reductions in fines loss can be achieved at the PDU by modifying the geometry of the secondary cyclone.

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Field Value
State active
Citation Not Available
Is NETL associated Yes
NETL Point of Contact Roy Long
NETL Point of Contact's Email
NETL program or project KMD
Publication Date 2/1/1988