Gasification development units

Fault Tree Analysis Report for CoaF Coal Gasitication Failure rales (per year basts) for over 400 events Coal-gasification Process Development unit 50. 

Gasification Process-Development Unit from fault trees Unavailability data systems and components ... 

DATA BOUNDARY Coal-gasification Process Development unit systems and... 

In this study detailed fault trees with probability and failure rate calculations were generated for the events (1) Fatality due to Explosion, Fire, Toxic Release or Asphyxiation at the Process Development Unit (PDU) Coal Gasification Process and (2) Loss of Availability of the PDU. The fault trees for the PDU were synthesized by Design Sciences, Inc., and then subjected to multiple reviews by Combustion Engineering. The steps involved in hazard identification and evaluation, fault tree generation, probability assessment, and design alteration are presented in the main body of this report. The fault trees, cut sets, failure rate data and unavailability calculations are included as attachments to this report. Although both safety and reliability trees have been constructed for the PDU, the verification and analysis of these trees were not completed as a result of the curtailment of the demonstration plant project. Certain items not completed for the PDU risk and reliability assessment are listed. 

The continuing search for technical and economic improvements in the coal gasification areas has provided incentives to develop newer process concepts starting in 1979. The Joint Program for 1979 includes processes in the Process Development Unit (PDU) stage of development which promise technical and/or economic improvements. Gasification processes included in the 1979 program are ... 

Figure 2. Differentiation between liquefaction and gasification by-product waters by pH and redox potential characteristics 1 and 2, waste water PETC coal liquefaction development unit, disposable catalyst, runs DCD 13B and DCD 12 3, waste water, SRC-1 plant 4, scrubber water, light oil, Blacksville No. 2 coal 5, waste water, fixed-bed gasifier, METC 6, waste water, fluidized-bed gasifier, Rosebud coal, PETC 7, gasifier condensate, 40 atm Nt, catalyst-impregnated Illinois 6 coal 8, gasifier condensate, 40 atm He, Montana Rosebud coal.

Mann R.M., Harris G.E., Menzies W.R., Simonson A.V. and Williams W.A. Environmental, health and safety data base for the KRW coal gasification process development unit. Report GRI-85/0123, Gas Research Institute, Chicago IL (1985). 

Biomass Gasification-Indirect Liquefaction Process Development Units (PDUs)... 

This molten salt gasification process is the basis for the Rockwell International molten salt coal gasification process. A 900-kg-h l (1 ton/h) process development unit pilot plant has been built and is being tested under contract from the Department of Energy. This plant includes the gasifier and a complete sodium carbonate recovery and regeneration system. 

Some fluidized-bed coal gasification development is taking place outside the United States. Even gasification systems originally developed in the United States (such as U-Gas and Westinghouse/KRW) are now continuing to be developed abroad. 

During the 1980s, C.E. cooperated with Mitsubishi Heavy Industries (MHI) on the development of the Japanese IGC coal gasification process. The key difference between the original C.E. gasification development and the Japanese IGC process is pressurized operation in the Japanese design. As discussed above, the Japanese are currently operating a 200 t/d pilot plant unit. 

Atmospheric Pressure, Entrained Flow Coal Gasification Process Development Unit Program." Palo Alto, California Electric Power Research Institute, February 1983. AP-2846. 

COMBISULF A process for removing sulfur compounds from the gases from combined-cycle power plants with integrated coal gasification. Carbonyl sulfide is removed by catalytic hydrolysis hydrogen sulfide is removed by selective absorbtion in aqueous MEDA and the sulfur is recovered from both processes by a modified Claus unit. Developed by Krupp Koppers and first operated in Spain in 1996. See PRENFLO. 

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