Partial Oxidation:Pyrolysis of Cattle Feedlot Manure in the SGFM Reactor. Final Report,September 1, 1976--August 31, 1977.

摘要

The production of an ammonia synthesis gas or a medium-Btu fuel gas from cattle feedlot manure has been evaluated on a small,pilot-plant reactor. The reactor ( /sup approx./ 1/2ton/day manure capacity) operates as a counter-current fluidized bed in which an air-steam mixture is used to fluidize and gasify the manure. This phase of the project is a continuation of earlier work. The reactor was operated at manure feed rates up to 23.6Kg/hr,air feed rates up to 6,000 l/hr and steam feed rates up to 6.4kg/hr. The average reactor temperature varied from 500to 640exp 0 C with the peak temperature in the reactor up to 950exp 0 C. At these conditions,the total gas yield varied from 4.8to 20.8SCF/lb dry,ash-free feed. The raw gas had a heating value greater than 250Btu/SCF in all cases. The maximum ethylene content in the raw gas was 7.0% by volume or,in terms of weight, 91lb C sub 2 H sub 4 /ton daf manure. A preliminary process design and economic evaluation of a commercial scale plant is recommended. This evaluation should include the production of an ammonia synthesis gas only and the production of ethylene and a synthesis gas. In addition to the pilot-plant study for manure, a bench-scale investigation was undertaken to compare the pyrolysis yields from manure and mesquite, a wood residue. This investigation is not complete,but the preliminary results indicate that the gas yield from mesquite pyrolysis is higher than from manure at similar conditions. The gas from mesquite pyrolysis contains approximately the same amount of ethylene as the manure pyrolysis gas. It is recommended that additional bench-scale studies be performed on the wood pyrolysis studies. A pilot-plant evaluation of wood pyrolysis is also recommended. (ERA citation 04:046047)