Subcontracted R and D Final Report: Gasifier Feed Preparation (Program Area 15.1.1)

摘要

This report summarizes attempts made by the Wilsonville Advanced Coal Liquefaction Facility to compact and granulate Kerr-McGee ash concentrate (KMAC) samples to be used in Texaco coal gasification tests. An earlier study had indicated that KMAC could not be used economically as a feedstock for Texaco gasification unless it was agglomerated. Agglomeration increases the concentration at which the KMAC can be pumped in water to the gasifier. During Wilsonville's tests, problems were encountered in compacting the material because most samples were too dry and aerated too easily. Addition of about 5 wt % water eliminated this problem. However, because the water was mixed in with the KMAC manually, nonuniform blending and low production rates resulted. Texaco examined the samples produced at Wilsonville and found they contained excessive amounts of material that was too coarse (i.e., +20 mesh). The fraction that was less than 20 mesh was initially acceptable in most samples tested; however, Texaco later found that the agglomerates disintegrated when they were stirred overnight in water. Thus, additional work would be required to increase the cohesive strength of the agglomerated KMAC. However, this program was discontinued in April 1981 because of DOE's withdrawal of support for the Texaco KMAC gasification tests. (ERA citation 09:025194)