Zinc halide hydrocracking process for distillate fuels from coal. Quarterly technical progress report, February 1--April 30, 1976

Technical Report · Fri May 14 04:00:00 EDT 1976

DOI:https://doi.org/10.2172/7342168· OSTI ID:7342168

Continuous hydrocracking of subbituminous coal with zinc chloride was demonstrated at zinc chloride-to-coal ratios of 2.0, 1.5 and 1.0. This bench-scale unit is now engaged in producing 300 pounds of spent catalyst for regeneration studies. The continuous bench-scale regenerator made eight runs with synthesized melt and three runs with natural spent catalyst melt. The natural melt was found to have a somewhat lower sintering temperature than the synthesized one, but a successful regeneration of natural melt was demonstrated at 1700/sup 0/F with good carbon removal. Reliability of the bench-scale units is much improved over earlier experience, the only significant failure being in the low-pressure system with zinc chloride vapor is condensed. Significant progress was made in assuring high recovery of zinc in the regeneration process. The coal ash, which is recovered via a cyclone from the regenerator offgases contains between 0.5 and 1.5 percent of the zinc fed. Batch tests have shown that up to 99 percent of this zinc can be stripped from this ash as zinc chloride by treatment with 10 percent HCl in nitrogen at cyclone temperature. Since this is the only major place for zinc loss, the potential recovery of zinc can be up to 99.98 percent of that fed to regeneration. Results of the batch kinetics study on zinc chloride hydrocracking of subbituminous coal are reported for 2000 and 3000 psig at temperatures of 725, 750 and 775/sup 0/F. Process design of a 100 lb/hr Process Development Unit has been completed and engineering design is underway.

• Research Organization: Conoco Coal Development Co., Library, Pa. (USA). Research Div.
• OSTI ID: 7342168
• Report Number(s): FE-1743-20
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
BENCH-SCALE EXPERIMENTS
CARBONACEOUS MATERIALS
CATALYSTS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COAL
COAL LIQUEFACTION
CRACKING
DECOMPOSITION
DESIGN
ENERGY SOURCES
FOSSIL FUELS
FUELS
HALIDES
HALOGEN COMPOUNDS
HYDROCRACKING
LIQUEFACTION
PYROLYSIS
REGENERATION
SUBBITUMINOUS COAL
ZINC CHLORIDES
ZINC COMPOUNDS
ZINC HALIDE PROCESS
ZINC HALIDES