A Calcium Oxide Sorbent Process for Bulk Separation of Carbon Dioxide. Final Report PDF Download
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Languages : en
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Languages : en
Pages : 31
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This research project is investigating the technical feasibility of a high-temperature, high-pressure process for the bulk separation of CO2 from coal-derived gas. Phase I consisted of 6 tasks. Phase II added a seventh task to the project. This report is limited to a description of the final experimental results obtained in Phase I, Task 5 (multicycle tests), and a brief overview of justification and plans for Phase II, Task 7.
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Languages : en
Pages : 31
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This research project is investigating the technical feasibility of a high-temperature, high-pressure process for the bulk separation of CO[sub 2] from coal-derived gas. Phase I consisted of 6 tasks. Phase II added a seventh task to the project. This report is limited to a description of the final experimental results obtained in Phase I, Task 5 (multicycle tests), and a brief overview of justification and plans for Phase II, Task 7.
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Languages : en
Pages : 100
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This research effort is designed to investigate the technical feasibility of a high-temperature, high-pressure process for the bulk separation of CO2 from coal-derived gases. The two-year contract was awarded in September 1989. This report describes the research effort and results obtained during the first year of the effort. The overall project consists of 6 tasks, four of which were active during year 01. Tasks 1 and 2 were completed during the year while activity in Tasks 3 and 6 will carry over into year 02. Tasks 4 and 5 will be initiated during year 02. Three primary objectives were met in Task 1. A literature search on the calcination-carbonation reactions of CO2 with calcium-based sorbents was completed. A high temperature, high pressure (HTHP) electrobalance reactor suitable for studying the calcination and carbonation reactions was constructed. This reactor system is now fully operable and we are routinely collecting kinetics data at temperatures in the range of 550-900°C and pressures of 1 to 15 atm. Samples of nine candidate calcium-based sorbents were acquired and tested. These samples were subjected to reaction screening tests as part of Task 2. As a result of these screening tests, chemically pure calcium carbonate, chemically pure calcium acetate, and the commercial dolomite were selected for more detailed kinetic testing. In Task 3, the HTHP electrobalance reactor is being used to study the calcination-carbonation behavior of the three base sorbents as a function of calcination temperature, carbonation temperature, carbonation pressure, and CO2 concentration.
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Languages : en
Pages : 26
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The original contract f or two years was awarded in September 1989 as a result of solicitation number DE-RA21-89MC26040 entitled ''Novel Concepts for Bulk Separation of Gases in Coal Gasification Systems.'' Two no-cost extensions without a change in the statement of work extended the performance period by six months to March 1992. At that time a two-year contract extension with an enlarged scope of work and additional funding was approved so that the research is now scheduled to end in March 1994. Phase I research, in which an electrobalance reactor was used to establish the technical feasibility of the regenerable sorbent process, was completed in March 1992 and results have been fully described in earlier quarterly reports. In Phase I, the calcination and carbonation characteristics of three calcium sorbents were studied as a function of calcination and carbonation temperature and pressure, mol fraction CO2 in the carbonation gas, and carbonation background gas composition. Desirable reaction conditions required for high reactivity and good sorbent durability were determined. Multicycle tests consisting of as many as ten complete calcination and carbonation cycles were completed. Indirect evidence which suggested that the water-gas shift reaction occurred simultaneously with CO2 removal was found. Occurrence of the simultaneous reactions created the possibility of a direct one-step process for the manufacture of hydrogen from coal-gas while at the same time separating a concentrated stream of CO2 The concentrated CO2 stream could be quite significant if, in the future, environmental regulations restrict atmospheric CO2 emissions.
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Languages : en
Pages : 34
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This research project is investigating the technical feasibility of a high-temperature, high-pressure (HTHP) process for the bulk separation of CO2 from coal-derived gas. Indirect evidence which suggested that the water-gas shift reaction occurred simultaneously with CO2 removal was found. Occurrence of the simultaneous reactions created the possibility of a direct one-step process for the manufacture of hydrogen from coal-gas while at the same time separating a concentrated stream of CO2. Previous quarterly reports have described the design, construction, and commissioning of the fixed-bed reactor, development of analytical procedures, and results of a number of tests using dolomite sorbent precursor. During the current quarter, additional tests were carried out to study the effects of calcination gas composition, temperature, and space velocity using the standard dolomite sorbents. Alternate sorbents were tested to provide direct comparison of dolomite and limestone performance. Tests were performed using an empty reactor and reactor packed with commercial shift catalyst to learn more of the characteristics of the shift reaction in the absence of carbonation. Toward the end of the quarter, emphasis changed to sorbent durability and a number of multicycle tests were completed.
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Languages : en
Pages : 25
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Phase I research, in which an electrobalance reactor was used to establish the technical feasibility of the regenerable sorbent process, was completed in March 1992 and results have been fully described in earlier quarterly reports. In Phase I, the calcination and carbonation characteristics of three calcium sorbents were studied as a function of calcination and carbonation temperature and pressure, mol fraction CO2 in the carbonation gas, and carbonation background gas composition. Desirable reaction conditions required for high reactivity and good sorbent durability were determined. Multicycle tests consisting of as many as ten complete calcination and carbonation cycles were completed. Indirect evidence which suggested that the water-gas shift reaction occurred simultaneously with CO2 removal was found. Occurrence of the simultaneous reactions created the possibility of a direct one-step process for the manufacture of hydrogen from coal-gas while at the same time separating a concentrated stream of CO2. The concentrated CO2 stream could be quite significant if, in the future, environmental regulations restrict atmospheric CO2 emissions.
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Category :
Languages : en
Pages : 10
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Book Description
This research project is investigating the technical feasibility of a high-temperature, high-pressure (HTHP) process for the bulk separation of CO2 from coal-derived gas. Phase I research, which utilized an electrobalance reactor, was completed during the previous quarter and final experimental results have been reported. Phase II research involves a switch from the electrobalance reactor to a laboratory-scale fixed-bed reactor having feed and product gas analysis capability. Initial effort during Phase II has been limited to project planning including the design and construction of the fixed-bed reactor, developing specifications for gas analysis, and ordering the gas chromatograph system. These activities are described in the present report.
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Category :
Languages : en
Pages : 31
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Book Description
This research project is investigating the technical feasibility of a high-temperature, high-pressure (HTHP) process for the bulk separation of CO2 from coal-derived gas. Phase I research, in which an electrobalance reactor was used to establish the technical feasibility of the regenerable sorbent process, was completed in March 1992 and results have been fully described in earlier quarterly reports. In Phase I, the calcination and carbonation characteristics of three calcium sorbents were studied as a function of calcination and carbonation temperature and pressure, mol fraction CO2 in the carbonation gas, and carbonation background gas composition. Desirable reaction conditions required for high reactivity and good sorbent durability were determined. Multicycle tests consisting of as many as ten complete calcination and carbonation cycles were completed. Indirect evidence which suggested that the water-gas shift reaction occurred simultaneously with CO2 removal was found. Occurrence of the simultaneous reactions created the possibility of a direct one-step process for the manufacture of hydrogen from coal-gas while at the same time separating a concentrated stream of CO2. The concentrated CO2 stream could be quite significant if, in the future, environmental regulations restrict atmospheric CO2, emissions.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 29
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Book Description
This research project is investigating the technical feasibility of a high-temperature, high pressure (HTHP) process for the bulk separation Of CO2 from coal-derived gas. Phase I research, in which an electrobalance reactor was used to establish the technical feasibility of the regenerable sorbent process, was completed in March 1992 and results have been fully described in earlier quarterly reports. In Phase 1, the calcination and carbonation characteristics of three calcium sorbents were studied as a function of calcination and carbonation temperature and pressure, mol fraction CO2 in the carbonation gas, and carbonation background gas composition. Desirable reaction conditions required for high reactivity and good sorbent durability were determined. Multicycle tests consisting of as many as ten complete calcination and carbonation cycles were completed. Indirect evidence which suggested that the water-gas shift reaction occurred simultaneously with CO2 removal was found. Occurrence of the simultaneous reactions created the possibility of a direct one-step process for the manufacture of hydrogen from coal-gas while at the same time separating a concentrated stream of CO2The concentrated CO2 Stream could be quite significant if, in the future, environmental regulations restrict atmospheric CO2 emissions.
