1 / 18

COAL GASIFICATION GASIFICATION ONLY REASONABLE WHEN PLANT IS INTEGRATED

This text provides an overview of gasification processes, including H2S removal, gas quality, and energy content, with a focus on integrated plants. It explores gasification types, operating parameters, and potential uses for the produced gas. Key topics covered include feedstock preparation, gas cleanup, gas liquors, and economic considerations for gasification plants. Figures illustrate options like Lurgi and Texaco gasifiers, highlighting the complexities and challenges of gasification technology.

lowder
Download Presentation

COAL GASIFICATION GASIFICATION ONLY REASONABLE WHEN PLANT IS INTEGRATED

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. COAL GASIFICATION GASIFICATION ONLY REASONABLE WHEN PLANT IS INTEGRATED SOME PROCESSES ARE COMMERCIAL H2S REMOVAL BY THE CLAUS PROCESS H2S + O2 = H2O + SO2 H2S + SO2 = S + H2O

  2. Energy Content Summary….

  3. Probable Uses…. • Low-Btu gas • Local electrical power generation • Cannot be used for home or commercial heating • Intermediate-Btu gas • Electrical power generation • Feed stock for chemicals • Town gas • High-Btu gas…. Same as natural gas

  4. Selection of a Gasifier • Type of bed • Operating pressure • Slagging, non-slagging Lurgi (fixed bed, high P, non-slagging) Koppers-Totzek (entrained bed, low P, slagging) Wellman-Galusha (fixed, low P, non-slagging) Winkler (fluidized, low P, non-slagging)

  5. CO2 25,303 TPD @ 8,920 Btu/lb FEED COAL H2S+CO2 SULFUR PLANT ELEMENTAL SULFUR * 128 LTPD GAS LIQUOR COAL PREPARATION OXYGEN-BLOWN COAL GASIFIERS CRUDE GAS SHIFT CONVERSION H2O+CO=H2+CO2 COMPRESSION AND DEHYDRATION SCRUBBING AND COOLING RECTISOL GAS PURIFICATION METHANATION 3H2+CO=CH4+H2O TARRY GAS LIQUOR OXYGEN PIPELINE GAS 290 MMSCFD @ 950 Btu/Scf OILY GAS LIQUOR N2 STEAM STEAM AND POWER PLANT GAS LIQUOR SEPARATION AND EFFLUENT WATER TREATMENT COAL FINES OXYGEN PLANT RECLAIMED WATER TO PLANT USE NAPHTHA ELECTRIC POWER TO PLANT USE AIR COAL TAR TOTAL LIQUIDS 8940 BBLS/day COAL OIL PHENOLS 155 tons/day AMMONIA Figure 7-6. Pipeline gas from coal via Lurgi pressure gasification.

  6. Figure 7-11. The Texaco gasifier (also Shell, Eastman)

  7. Produce low-Btu gas Inject air and steam Chemical reactions System for In-Situ Gasification of Coal From Wiser, 2000

  8. Financial Dilemma • Synthetic natural gas cost - >$10.00/106 Btu • Investment - 75 x 1012 Btu/year plant, 30 year life - $8 billion • Benchmark is cost of oil and gas energy sources - Need a floor on the price of energy over a long time frame

More Related