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Document This document is not available electronically via this database.
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Title Hydrogen sulfide evolution from Colorado oil shale
Creator/Author Burnham, A.K. ; Bey, N.K. ; Koskinas, G.J.  
Publication Date 1980 Nov 26
OSTI Identifier OSTI ID: 6752158
Report Number(s) UCRL-84066(Rev.1);CONF-800889-2(Rev.1)
DOE Contract Number W-7405-ENG-48
Resource Type Conference
Specific Type Technical Report
Resource Relation Symposium on oil shale, tar sands, and related materials; Aug 1980; San Francisco, CA, USA
Research Org California Univ., Livermore (USA). Lawrence Livermore National Lab.
Subject 040500 -- Oil Shales & Tar Sands-- Properties & Composition ;040402 -- Oil Shales & Tar Sands-- Surface Methods; ;HYDROGEN SULFIDES-- CHEMICAL REACTION YIELD;OIL SHALES-- PYROLYSIS;PYRITES-- OXIDATION; AIR POLLUTION;ARGON;COMPARATIVE EVALUATIONS;EXPERIMENTAL DATA;GREEN RIVER FORMATION;HIGH TEMPERATURE;IRON OXIDES;KEROGEN;RETORTING;STEAM;TEMPERATURE DEPENDENCE
Related Subject BITUMINOUS MATERIALS;CARBONACEOUS MATERIALS;CHALCOGENIDES;CHEMICAL REACTIONS;DATA;DECOMPOSITION;ELEMENTS;ENERGY SOURCES;FLUIDS;FOSSIL FUELS;FUELS;GASES;HYDROGEN COMPOUNDS;INFORMATION;IRON COMPOUNDS;MATERIALS;MINERALS;NONMETALS;NUMERICAL DATA;ORES;ORGANIC MATTER;OXIDES;OXYGEN COMPOUNDS;POLLUTION;RARE GASES;SULFIDES;SULFUR COMPOUNDS;SULFUR ORES;THERMOCHEMICAL PROCESSES;TRANSITION ELEMENT COMPOUNDS;YIELDS
Description/Abstract The dependence of H/sub 2/S evolution on gas atmosphere was measured in this study.^The gas environments used were argon, autogenous (self-generated), and steam-argon mixtures, all at atmospheric pressure.^The samples used in these experiments were Green River oil shale from Colorado.^In Green River oil shale, sulfur occurs in both inorganic and organic combinations; 70 to 85% of the sulfur is present as pyrite, and most of the remaining sulfur is present as organic sulfur.^During pyrolysis, H/sub 2/S could be formed from the reaction of pyrite with hydrocarbons, hydrogen, or water, and from cracking or organosulfur compounds.^The objective was to determine the importance of these various reactions and to report the amounts of H/sub 2/S evolved from oil-shale samples obtained from locations in Colorado.^Most of the sulfur in oil shale occurs in pyrite and a smaller amount is contained in the kerogen.^The major sources of H/sub 2/S during oil shale pyrolysis appears to be the reaction of pyrite with organic matter.^In an autogenous atmosphere, most of the H/sub 2/S evolves between 400 and 500/sup 0/C.^Addition of finely ground pyrite increases the amount of H/sub 2/S evolved but does not change the evolution profile.^In an argon atmosphere, however, added pyrite causes a substantial increase in H/sub 2/S evolution only between 475 and 525/sup 0/C.^Similar reaction characteristics were observed with large-grained natural pyrite in Tract C-a shale.^The argon results demonstrate the importance of intimate contact between the pyrite and organic material.^In a steam atmosphere, pyrite is oxidized to iron oxides and the H/sub 2/S evolution increases substantially.^In some samples, essentially all the initial sulfur is evolved as H/sub 2/S at temperatures below 800/sup 0/C.^However, thermodynamics may limit the amount of H/sub 2/S produced from pyrrhotite under retort conditions.
Country of Publication United States
Language English
Format Pages: 25
Availability NTIS, PC A02/MF A01.
System Entry Date 2001 May 13
3Â¥2008-09-28 16:05:18
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ABurnham, A.K.ABey, N.K.AKoskinas, G.J.D1980K040500 -- Oil Shales & Tar Sands-- Properties & Composition ;040402 -- Oil Shales & Tar Sands-- Surface Methods; ;HYDROGEN SULFIDES-- CHEMICAL REACTION YIELD;OIL SHALES-- PYROLYSIS;PYRITES-- OXIDATION; AIR POLLUTION;ARGON;COMPARATIVE EVALUATIONS;EXPERIMENTAL DATA;GREEN RIVER FORMATION;HIGH TEMPERATURE;IRON OXIDES;KEROGEN;RETORTING;STEAM;TEMPERATURE DEPENDENCE; BITUMINOUS MATERIALS;CARBONACEOUS MATERIALS;CHALCOGENIDES;CHEMICAL REACTIONS;DATA;DECOMPOSITION;ELEMENTS;ENERGY SOURCES;FLUIDS;FOSSIL FUELS;FUELS;GASES;HYDROGEN COMPOUNDS;INFORMATION;IRON COMPOUNDS;MATERIALS;MINERALS;NONMETALS;NUMERICAL DATA;ORES;ORGANIC MATTER;OXIDES;OXYGEN COMPOUNDS;POLLUTION;RARE GASES;SULFIDES;SULFUR COMPOUNDS;SULFUR ORES;THERMOCHEMICAL PROCESSES;TRANSITION ELEMENT COMPOUNDS;YIELDSMOSTI ID: 6752158
PPages: 25THydrogen sulfide evolution from Colorado oil shaleXThe dependence of H/sub 2/S evolution on gas atmosphere was measured in this study.^The gas environments used were argon, autogenous (self-generated), and steam-argon mixtures, all at atmospheric pressure.^The samples used in these experiments were Green River oil shale from Colorado.^In Green River oil shale, sulfur occurs in both inorganic and organic combinations; 70 to 85% of the sulfur is present as pyrite, and most of the remaining sulfur is present as organic sulfur.^During pyrolysis, H/sub 2/S could be formed from the reaction of pyrite with hydrocarbons, hydrogen, or water, and from cracking or organosulfur compounds.^The objective was to determine the importance of these various reactions and to report the amounts of H/sub 2/S evolved from oil-shale samples obtained from locations in Colorado.^Most of the sulfur in oil shale occurs in pyrite and a smaller amount is contained in the kerogen.^The major sources of H/sub 2/S during oil shale pyrolysis appears to be the reaction of pyrite with organic matter.^In an autogenous atmosphere, most of the H/sub 2/S evolves between 400 and 500/sup 0/C.^Addition of finely ground pyrite increases the amount of H/sub 2/S evolved but does not change the evolution profile.^In an argon atmosphere, however, added pyrite causes a substantial increase in H/sub 2/S evolution only between 475 and 525/sup 0/C.^Similar reaction characteristics were observed with large-grained natural pyrite in Tract C-a shale.^The argon results demonstrate the importance of intimate contact between the pyrite and organic material.^In a steam atmosphere, pyrite is oxidized to iron oxides and the H/sub 2/S evolution increases substantially.^In some samples, essentially all the initial sulfur is evolved as H/sub 2/S at temperatures below 800/sup 0/C.^However, thermodynamics may limit the amount of H/sub 2/S produced from pyrrhotite under retort conditions.
0Conference Proceedings
@UCRL-84066(Rev.1);CONF-800889-2(Rev.1)
CUnited States
Z System Entry Date: 05/13/2001
2 Availability: NTIS, PC A02/MF A01.
3 Source: ERA-06-008623;EDB-81-020377
1 Language: English
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