A Calcium Oxide Sorbent Process for Bulk Separation of Carbon Dioxide. Quarterly Progress Report 19, January--March, 1994 PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download A Calcium Oxide Sorbent Process for Bulk Separation of Carbon Dioxide. Quarterly Progress Report 19, January--March, 1994 PDF full book. Access full book title A Calcium Oxide Sorbent Process for Bulk Separation of Carbon Dioxide. Quarterly Progress Report 19, January--March, 1994 by . Download full books in PDF and EPUB format.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 34
Get Book Here
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. 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.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 34
Get Book Here
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. 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.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 26
Get Book Here
Book Description
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.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 25
Get Book Here
Book Description
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 : Power resources
Languages : en
Pages : 1032
Get Book Here
Book Description
Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 31
Get Book Here
Book Description
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.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 31
Get Book Here
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
Get Book Here
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.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 195
Get Book Here
Book Description
The expected commercialization of coal gasification technology in the US and world-wide will create a need for advanced gas purification and separation processes capable of operating at higher temperatures and in more hostile environments than is common today. For example, a high-temperature, high-pressure process capable of separating CO2 from coal-derived gas may find application in purifying synthesis gas for H2, NH3, or CH3OH production. High temperature CO2 removal has the potential for significantly improving the operating efficiency of integrated gasification-molten carbonate fuel cells for electric power generation. This study proved the technical feasibility of a CO2-separation process based upon the regenerable noncatalytic gas-solid reaction between CaO and CO2 to form CACO3. Such a process operating at 650°C and 15 atm with 15% CO2 in the coal gas has the potential for removing in excess of 99% of the CO2 fed. Selection of a sorbent precursor which, upon calcination, produces high-porosity CaO is important for achieving rapid and complete reaction. The addition of magnesium to the sorbent appears to improve the multicycle durability at a cost of reduced CO2 capacity per unit mass of sorbent. Reaction conditions, principally calcination and carbonation temperatures, are important factors in multicycle durability. Reaction pressure and CO2 concentration are important in so far as the initial rapid reaction rate is concerned, but are relatively unimportant in terms of sorbent capacity and durability. Indirect evidence for the simultaneous occurrence of the shift reaction and CO2-removal reaction creates the possibility of a direct one-step process for the production of hydrogen from coal-derived gas.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
Get Book Here
Book Description
Objective is to investigate the feasibility of a high-temperature, high-pressure process for bulk separation of CO2 from coal- derived gas. An electrobalance reactor was used in Phase I; in Phase II, the switch was made to a fixed-bed reactor with capability for feed and product gas analysis. A gas chromatograph was delivered, installed, and operator training carried out. The sampling valve sequence is discussed.
