Hot low Btu producer gas desulfurization in fixed bed of iron oxide-fly ash. Monthly report No. 12, 1 June--30 June 1976; quarterly report No. 4, 1 April--30 June 1976

Technical Report · Thu Aug 19 04:00:00 EDT 1976

DOI:https://doi.org/10.2172/7138785· OSTI ID:7138785

Leuenberger, E. L.

This is the twelfth monthly and fourth quarterly progress report of the APCI support program to assist ERDA in the development of their hot producer gas desulfurization process. An iron oxide--fly ash sorbent will be used in a fixed-bed cyclic operation. Specific objectives of APCI are sorbent development, definition of process scale-up criteria, and commercial process design. Major emphasis this period has been in the following areas: (1) Dynamic Tests of Experimental Sorbents. Dynamic sorption tests were conducted to determine the optimum sorbent composition. Conclusions are based on the amount of producer gas processed by fresh sorbent prior to 10 percent sulfur breakthrough. Tests indicated that sorbent performance was not affected by the type of material used as a binder or a support for the iron oxide. Optimum iron oxide content was 42 percent at 20 psig increased the optimum iron oxide content to at least 63 percent and doubled available sorbent sulfur capacity at 10 percent sulfur breakthrough. The effects of pressure on sorbent performance were measured between 20 and 400 psig. In general, sorbent performance was improved at 400 psig. Temperature effects on sorbent performance at 900/sup 0/F were successfully measured. At this temperature, sorbent disintegration is extensive in the presence of H/sub 2/S free producer gas while it is not at temperatures as low as 600/sup 0/F and as high as 1400/sup 0/F. Thus commercial hot stage desulfurization using iron oxide sorbent at 900/sup 0/F is not recommended. (2) Correlation of Test Data Using an Isothermal Sorption Model. A model based on fluid phase transport of H/sub 2/S to the sorbent and a slow rate of reaction once the H/sub 2/S gets to the sulfur sorption site has been derived. A full solution and a simplified solution to the model are presented. The model is shown to correlate the experimental test data with a good degree of confidence.

• Research Organization: Air Products and Chemicals, Inc., Marcus Hook, Pa. (USA)
• OSTI ID: 7138785
• Report Number(s): FE-2033-13
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
ADSORBENTS
AEROSOL WASTES
BINDERS
CHALCOGENIDES
CHEMICAL REACTIONS
DESULFURIZATION
DISPERSIONS
ENERGY SOURCES
FLUIDS
FLY ASH
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
IRON COMPOUNDS
IRON OXIDES
LOW BTU GAS
MATERIALS TESTING
MEDIUM PRESSURE
MIXTURES
OXIDES
OXYGEN COMPOUNDS
PRESSURE DEPENDENCE
PRODUCER GAS
REMOVAL
SORPTION
SORPTIVE PROPERTIES
SULFIDES
SULFUR COMPOUNDS
SURFACE PROPERTIES
TESTING
TRANSITION ELEMENT COMPOUNDS
WASTES