Hot low Btu producer gas desulfurization in fixed bed of iron oxide-fly ash. Progress report No. 1, July 12--September 30, 1977

Technical Report · Thu Oct 13 04:00:00 EDT 1977

DOI:https://doi.org/10.2172/5030355· OSTI ID:5030355

Joshi, D. K.

This is the first progress report on this APCI project to assist ERDA in the development of their hot producer gas desulfurization process. An iron oxide sorbent will be used in a fixed bed cyclic operation. Specific objectives are: Investigation of conditions that yield elemental sulfur as a byproduct during regeneration of sulfided sorbent, preliminary economic analysis, and application of APCI developed mathematical model to MERC data. Several alternate reaction mechanisms that yield elemental sulfur as a byproduct during regeneration have been compared thermodynamically over a wide temperature range. Incomplete oxidation of iron sulfide is the thermodynamically most favored mechanism. Mathematical analysis was done to determine operating conditions that result in bed temperature rises greater than the gas adiabatic temperature rise. The safe operating regions to avoid damage to the sorbent were determined in terms of dimensionless numbers and actual process variables. The test set up for experimental work is designed and necessary equipment is ordered. Using the APCI mathematical model, the entire breakthrough curves and temperature exotherms for two absorption and two regeneration runs were simulated. The predicted breakthrough curves compare very well with the observed breakthrough curves. The predicted temperature exotherms do not agree with the observed temperature exotherms in regeneration, probably due to non-adiabaticity, axial dispersion and side reactions.

• Research Organization: Air Products and Chemicals, Inc., Marcus Hook, Pa. (USA). Houdry Technical Center
• OSTI ID: 5030355
• Report Number(s): FE-2757-1
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
010404 -- Coal
Lignite
& Peat-- Gasification
CHALCOGENIDES
CHEMICAL REACTIONS
COAL GASIFICATION
DESULFURIZATION
ELEMENTS
ENERGY SOURCES
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
GASIFICATION
HOT GAS CLEANUP
IRON COMPOUNDS
IRON OXIDES
LOW BTU GAS
MATHEMATICAL MODELS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PACKED BED
PRODUCER GAS
PURIFICATION
RECOVERY
REGENERATION
SORPTIVE PROPERTIES
SULFUR
SURFACE PROPERTIES
THERMODYNAMICS
TRANSITION ELEMENT COMPOUNDS