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Enhanced durability and reactivity for zinc ferrite desulfurization sorbent
AMAX Research Development Center (AMAX R D) has been investigating methods for enhancing the reactivity and durability of the zinc ferrite desulfurization sorbent. Zinc ferrite sorbents are intended for use in desulfurization of hot coal gas in integrated gasification combined cycle (IGCC) or molten carbonate fuel cell (MCFC) applications. For the present program, the reactivity of the sorbent may be defined as its sulfur sorption capacity at the breakthrough point and at saturation in a bench-scale, fixed-bed reactor. Durability may be defined as the ability of the sorbent to maintain important physical characteristics such As size, strength, and specific surface area during 10 cycles of sulfidation and oxidation.
Date:
May 2, 1989
Creator:
Jha, M. C. & Berggren, M. H.
Object Type:
Report
System:
The UNT Digital Library
Enhanced Durability and Reactivity for Zinc Ferrite Desulfurization Sorbent
AMAX Research Development Center (AMAX R D) has been investigating methods for enhancing the reactivity and durability of the zinc ferrite desulfurization sorbent. Zinc ferrite sorbents are intended for use in desulfurization of hot coal gas in integrated gasification combined cycle (IGCC) or molten carbonate fuel cell (MCFC) applications. For the present program, the reactivity of the sorbent may be defined as its sulfur sorption capacity at the breakthrough point and at saturation in a bench-scale, fixed-bed reactor. Durability may be defined as the ability of the sorbent to maintain important physical characteristics such as size, strength, and specific surface area during 10 cycles of sulfidation and oxidation.
Date:
May 2, 1989
Creator:
Silaban, A. & Harrison, D.P.
Object Type:
Report
System:
The UNT Digital Library
Thermal Regimes of Major Volcanic Centers: Magnetotelluric Constraints
The interpretation of geophysical/electromagnetic field data has been used to study dynamical processes in the crust beneath three of the major tectono-volcanic features in North America: the Long Valley/Mono Craters Volcanic Complex in eastern California, the Cascades Volcanic Belt in Oregon, and the Rio Grande Rift in the area of Socorro, New Mexico. Primary accomplishments have been in the area of creating and implementing a variety of 2-D generalized inverse computer codes, and the application of these codes to fields studies on the basin structures and he deep thermal regimes of the above areas. In order to more fully explore the space of allowable models (i.e. those inverse solutions that fit the data equally well), several distinctly different approaches to the 2-D inverse problem have been developed: (1) an overdetermined block inversion; (2) an overdetermined spline inverstion; (3) a generalized underdetermined total inverse which allows one to tradeoff certain attributes of their model, such as minimum structure (flat models), roughness (smooth models), or length (small models). Moreover, we are exploring various approaches for evaluating the resolution model parameters for the above algorithms. 33 refs.
Date:
October 2, 1989
Creator:
Hermance, J. F.
Object Type:
Report
System:
The UNT Digital Library
[Memorandum from Richard L. Simms to Donald E. Chipman, November 2, 1989]
Letter from Richard L. Simms to Donald E. Chipman, on November 2, 1989, discussing finding Julian C. Stanley and his wife a place to stay during their visit to Denton, during which Stanley will teach a class on gifted children.
Date:
November 2, 1989
Creator:
Simms, Richard L.
Object Type:
Letter
System:
The UNT Digital Library
Guest Artist Recital: 1989-02-02 - David Pino, clarinet, and Mark Dal Porto, piano
Access:
Use of this item is restricted to the UNT Community
Guest artist recital performed at the UNT College of Music Recital Hall.
Date:
February 2, 1989
Creator:
Pino, David & Dal Porto, Mark
Object Type:
Sound
System:
The UNT Digital Library
[Photograph 2012.201.B0113.0455]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "U. S. Grant's Justin Bryant is off and running with an interception as Ardmore's Jake Wade gives chase in Thursday night's game."
Date:
November 2, 1989
Creator:
Sisney, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Memorandum from Jim Miller to Rogers Redding, February 2, 1989]
Memo from Jim Miller to Rogers Redding, on February 2, 1989, sending him a letter from Julian C. Stanley and Ann Lupkowski, who offer suggestions for a Study of Mathematically Precocious Youths at the University of North Texas.
Date:
February 2, 1989
Creator:
Miller, James R.
Object Type:
Letter
System:
The UNT Digital Library
[Photograph 2012.201.B0162.0044]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
March 2, 1989
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0162.0045]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Gray Dickinson is helping Boulevard Bowl prepare for the U. S. Open."
Date:
March 2, 1989
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0139.0601]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Sean Collard watches his tee shot on the 13th hole Wednesday at Indian Springs Country Club."
Date:
August 2, 1989
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0143.0188]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Supercross motorcycle racer Guy Cooper, left, shares the podium with Oklahoma City Mayor Ron Norick."
Date:
June 2, 1989
Creator:
Sisney, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0135.0610]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Doug Clark of Wayne, Ok., gets ready to rope a steer"
Date:
November 2, 1989
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0143.0181]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
June 2, 1989
Creator:
Sisney, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0349.0152]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Soldiers at nearby Fort Sill continue to feel the effects of the 1987 draining of Lake Elmer Thomas in more ways than one."
Date:
September 2, 1989
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
The relation of electrode voltages to charge position in SLC arc and final focus beam position monitors
The position of a charged particle beam can be measured with a Beam Position Monitor (BPM) by converting the voltages induced on its array of electrodes into a position offset from the array's center. Most of the BPMs in the Arcs and Final Focus of the SLC use four stripline electrodes arranged symmetrically around the beam; normalized voltage differences are calculated as the difference divided by the sum of voltages on opposite electrode pairs. The resulting number is multiplied by a conversion factor, denoted in this paper as S{sub b}, to give the offset (in millimeters) of the charge from the center of the BPM. Prior to installation in the beam line, the BPMs were calibrated with a charge pulse on a rod. Owing to geometric effects which will be discussed later, a different conversion factor had to be used for calibration. It will be denoted here by S{sub r}. This paper gives the results of calculations and measurements of S{sub r} and S{sub b} for Arc and Final Focus BPMs. This paper also describes the relevant physical properties of the several types of BPMs and calculations of the expected scale factors, the measurement methods used, and gives the results …
Date:
November 2, 1989
Creator:
Fordham, C.
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0256.0202]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
November 2, 1989
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0354.0636]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Robert E. Lee, left, senior metro editor at The Oklahoman, receives a national Founder's Award from Toney Lackey, president of a state chapter of the National Association of Civilian Conservation Corps Alumni."
Date:
October 2, 1989
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0264.0181]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Roger Brazeau rides Twist of Mist, owned by Nelson King of Kanata, Ontario, Canada, during the open division competition Saturday at the state fairgrounds."
Date:
December 2, 1989
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0313B.0464]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "OCC's Bryan Jennings is fouled by SNU's Jay Niehues on a play beneath the basket."
Date:
February 2, 1989
Creator:
Sisney, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0354.0071]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Jane Leister will portray Mary, mother of Jesus, at 8:30 and 11 a.m. Sunday at First Presbyterian Church of Edmond."
Date:
December 2, 1989
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0256.0201]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
November 2, 1989
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0270.0421]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Mike Hughett of Owasso tries to urge home a putt on No. 6 Wednesday."
Date:
August 2, 1989
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0229.0525]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "William Anson Grieb leaves the courtroom after his arraignment on charges he practiced veterinary medicine a license..."
Date:
August 2, 1989
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0353.0158]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Cedar Lake, Glenn Schaapveld"
Date:
May 2, 1989
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History