WorldCat Identities

Clark Atlanta University

Overview
Works: 1,702 works in 1,739 publications in 1 language and 4,315 library holdings
Genres: Periodicals  Catalogs  Conference papers and proceedings  Criticism, interpretation, etc 
Roles: Researcher
Classifications: E185.5, 909.0496005
Publication Timeline
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Most widely held works by Clark Atlanta University
Phylon( )

in English and held by 1,372 WorldCat member libraries worldwide

The Status of Black Atlanta( )

in English and held by 96 WorldCat member libraries worldwide

Chemically derived dense alumina-zirconia composites for improved mechanical and wear erosion properties : final report for project no. NAG4-0011( Book )

1 edition published in 1998 in English and held by 83 WorldCat member libraries worldwide

In the eye of the muses : selections from the Clark Atlanta University art collection by Clark Atlanta University( Book )

2 editions published in 2012 in English and held by 77 WorldCat member libraries worldwide

Clark Atlanta University Art Galleries in Atlanta, Georgia celebrates the seventieth anniversary of the founding of its permanent collection and the sixtieth anniversary of the unveiling of the 'Art of the Negro' murals with this commemorative volume. Initially conceived with works selected from annual exhibitions, the collection today constitutes a rare and remarkable assemblage of African-American art. This book tells the story of the Atlanta University Art Annuals held between 1942 and 1970, from which the collection stemmed, cataloging the 887 artists who participated and crucially enhancing our understanding of art by African Americans. In an accompanying essay, Hale Woodruff's 'Art of the Negro' mural suite is eloquently explicated by art critic Jerry Cullum. 'In the Eye of the Muses' presents a monumental catalogue of a unique collection
The status of Black Atlanta 1993 by Southern Center for Studies in Public Policy( Book )

2 editions published in 1993 in English and held by 65 WorldCat member libraries worldwide

Proceedings of the American Society for Composites Eleventh Technical Conference : October 7-9, Omni Hotel at CNN, Atlanta, Georgia by American Society for Composites( Book )

1 edition published in 1996 in English and held by 22 WorldCat member libraries worldwide

The Phylon quarterly( )

in English and held by 8 WorldCat member libraries worldwide

Literary magnitude: classics in non-Western traditions( Book )

2 editions published in 1990 in English and held by 8 WorldCat member libraries worldwide

Racing to save the planet : environmental career opportunities for minorities( Visual )

1 edition published in 1993 in English and held by 6 WorldCat member libraries worldwide

Hydrogen from biomass for urban transportation by W. W Boone( Book )

2 editions published in 2008 in English and held by 2 WorldCat member libraries worldwide

The objective of this project was to develop a method, at the pilot scale, for the economical production of hydrogen from peanut shells. During the project period a pilot scale process, based on the bench scale process developed at NREL (National Renewable Energy Lab), was developed and successfully operated to produce hydrogen from peanut shells. The technoeconomic analysis of the process suggests that the production of hydrogen via this method is cost-competitive with conventional means of hydrogen production
IMPROVED CATALYSTS FOR HEAVY OIL UPGRADING BASED ON ZEOLITE Y NANOPARTICLES ENCAPSULATED STABLE NANOPOROUS HOST( )

1 edition published in 2005 in English and held by 0 WorldCat member libraries worldwide

The objectives of this project are to synthesis nanocrystals of highly acidic zeolite Y, encapsulate them within the channels of mesoporous (nanoporous) silicates or nanoporous organosilicates and evaluate the ''zeolite Y/Nanoporous host'' composites as catalysts for the upgrading of heavy petroleum feedstocks. Our results to date are summarized as follows. The synthesis of high surface ordered nanoporous silica of expanded pore diameter of 25 nm (larger than the standard size of 8.4 nm) using trimethylbenzene as a pore size expander was accomplished. The synthesis of zeolite Y nanoparticles with median pore size of approximately 50 nm (smaller than the 80 nm typically obtained with TMAOH) using combined TMABr/TMAOH as organic additives was also accomplished. The successful synthesis of zeoliteY/Nanoporous host composite materials by sequential combination of zeolite precursors and nanoporous material precursor mixtures was implied based on results from various characterization techniques such as X-Ray diffraction, infrared spectra, thermal analysis, porosimetry data. The resulting materials showed pore sizes up to 11 nm, and infrared band at 570 cm⁻¹ suggesting the presence of both phases. Work in the immediate future will be focused on the following three areas: (1) Further characterization of all-silica and aluminosilicate mesoporous materials with expanded pore sizes up to 30 nm will continue; (2) Research efforts to reduce the average particle size of zeolite nanoparticles down to 35-30 nm will continue; (3) Further synthesis of polymer-SBA15 nanocomposites will be conducted by changing the amount and chemistry of the zeolitic precursors added; and (4) Investigation on the catalytic properties of the materials using probe catalytic reactions (such as cumene cracking), followed by catalytic testing for heavy oil conversion
Study of the effects of ambient conditions upon the performance of fan powered, infrared, natural gas burners. Quarterly technical progress report, October 1, 1996--December 31, 1996( )

2 editions published between 1996 and 1997 in English and held by 0 WorldCat member libraries worldwide

This quarterly technical progress report describes work performed under DOE Grant No. DE-FG22-94MT94011 during the period September 1, 1996 to December 31, 1996 which covers the nineth quarter of the project. The objective of this investigation is to characterize the operation of a fan powered infrared burner (IR burner) at various gas compositions and ambient conditions and develop design guidelines for appliances containing PIR burners for satisfactory performance. The fan powered infrared burner is a technology introduced more recently in the residential and commercial markets. It is a surface combustor that elevates the temperature of the burner head to a radiant condition. A variety of metallic and ceramic materials are used for the burner heads. It has been demonstrated that infrared burners produce low CO and NO(subscript x) emissions in a controlled geometric space. As the environmental regulations become more stringent, infrared burners are receiving increasing interests
IMPROVED CATALYSTS FOR HEAVY OIL UPGRADING BASED ON ZEOLITE Y NANOPARTICLES ENCAPSULATED IN STABLE NANOPOROUS HOST( )

1 edition published in 2005 in English and held by 0 WorldCat member libraries worldwide

Composite materials of SBA-15/zeolite Y were synthesized from zeolite Y precursor and a synthesis mixture of mesoporous silicate SBA-15 via a hydrothermal process in the presence of a slightly acidic media of pH 4-6 with 2M H₂SO₄. The SBA-15/ZY composites showed Type IV adsorption isotherms, narrow BJH average pore size distribution of 4.9 nm, surface areas up to 800 m²²g and pore volumes 1.03 cm³, all comparable to pure SBA-15 synthesized under similar conditions. Chemical analysis revealed Si/Al ratio down to 8.5 in the most aluminated sample, and ²⁷AlSS MAS NMR confirmed aluminum was in tetrahedral coordination. This method of introduction of Al in pure T{sub d} coordination is effective in comparison to other direct and post synthesis alumination methods. Bronsted acid sites were evident from a pyridinium peak at 1544 cm-1 in the FTIR spectrum after pyridine adsorption, and from NH₃ -TPD experiments. SBA-15/ZY composites showed significant catalytic activities for the dealkylation of isopropylbenzene to benzene and propene, similar to those of commercial zeolite Y. It was observed that higher conversion for catalysts synthesized with high amount of ZY precursor mixture added to the SBA-15. Over all the composites has shown good catalytic activity. Further studies will be focused on gaining a better understand the nature of the precursor, and to characterize and to locate the acid sites in the composite material. The composite will also be evaluated for heavy oil conversion to naphtha and middle distillates
IMPROVED CATALYSTS FOR HEAVY OIL UPGRADING BASED ON ZEOLITE Y NANOPARTICLES ENCAPSULATED IN STABLE NANOPOROUS HOSTS( )

1 edition published in 2004 in English and held by 0 WorldCat member libraries worldwide

The focus of this project is to improve the catalytic performance of zeolite Y for heavy petroleum hydrocracking by synthesizing nanoparticles of the zeolite ((almost equal to)20-30 nm) inside nanoporous silicate or aluminosilicate hosts of similar pore diameters. The encapsulated zeolite nanoparticles are expected to possess pores of reduced diffusional path lengths, hence hydrocarbon substrates will diffuse in, are converted and the products quickly diffused out. This is expected to prevent over-reaction, hence minimizing pore blockage and active sites deactivation. In this phase of the project, research activities were focused on refining procedures to: (a) improve the synthesis of ordered, high surface area nanoporous silica, such as SBA-15, with expanded pore size using trimethylbenzene as additive to the parent SBA-15 synthesis mixture; and (b) reduce the particle size of zeolite Y such that they can be effectively incorporated into the nanoporous silicas. The synthesis of high surface ordered nanoporous silica containing enlarged pores of diameter of 25 nm (larger than the standard size of 8.4 nm) using trimethylbenzene as a pore size expander was accomplished. The synthesis of zeolite Y nanoparticles with median pore size of approximately 50 nm (smaller than the 80 nm typically obtained with TMAOH) using combined TMABr/TMAOH as organic additives was also accomplished
A novel approach to highly dispersing catalytic materials in coal for gasification. Second quarterly report, January 1, 1990--March 31, 1990( )

5 editions published between 1990 and 1992 in English and held by 0 WorldCat member libraries worldwide

This project seeks to develop a technique, based on coal surface properties, for highly dispersing catalysts in coal for gasification and to investigate the potential of using potassium carbonate and calcium acetate mixtures as catalysts for coal gasification. The work is focused on the elucidation of coal-catalyst precursor interactions in solution and the variables which control the adsorption and dispersion of coal gasification metal catalysts. In order to optimize coal-metal ion interactions and hence maximize catalyst activity, the study examines the surface electrochemistry of a lignite, a subbituminous, and a bituminous coals and their demineralized and oxidized derivatives prior to loading with the catalytic materials. The surface electrical properties of the coals are investigated with the aid of electrophoresis, while the effects of the surface charge on the adsorption of K and Ca{sup 2+} are studied by agitating the coals with aqueous solutions of potassium and calcium. Zeta potential studies show that the surfaces of the lignite are negatively charged between about pH2 to 11, the negative charge density increasing with increase in pH. Highly alkaline media promoted calcium adsorption due to high negative charge on the coal, while calcium uptake was inhibited in strongly acidic solutions
Measuring food security in the Dominican Republic : adaptation of the U.S. food security survey module by Mesfin Bezuneh( )

1 edition published in 2008 in English and held by 0 WorldCat member libraries worldwide

A NEW CLASS OF MESOPOROUS ALUMINOPHOSPHATES FOR APPLICATION IN PERTOLEUM REFINING( )

1 edition published in 2003 in English and held by 0 WorldCat member libraries worldwide

This project focuses on the synthesis of mesoporous aluminophosphate and aluminosilicates as catalysts for application in the conversion of large petroleum feedstock compounds to useful middle distillates and naphtha transportation fuels. Summarized herein, is our research progress for September 1, 2001 to August 31, 2002. The synthesis of aluminophosphates in the presence of nonionic surfactants and block co-polymers were explored over a wide range of synthesis variables such as temperature, Al/P ratio, pH and surfactants/polymer concentrations. In most cases, the resulting products were found to be amorphous. A partially ordered aluminophosphate mesophase was obtained in the presence of Brij 56 non-ionic surfactant. Further characterization to determine the phase type (e.g. hexagonal lamellar or cubic) of this product is pending. The amorphous nature of the products obtained using these classes of surfactants are in contrast to highly ordered aluminophosphates mesophases obtained in the presence of cationic quaternary ammonium surfactants, such as cetyltrimethylammonium detailed in a previous report. The synthesis of pure-silica and aluminosilicate mesophases of different type and quality were also conducted over a wide range of variables such as temperature, Si/Al ratio, pH and surfactants/polymer concentrations. However characterization of the phase type and quality of the materials produced is pending due to a severe and extended malfunction of the X-Ray Diffractometer. Nitrogen porosimetry of selected calcined samples showed various absorption isotherm with some samples showing type IV with a large step in the mesoporous range. Surface area of the samples varied and maximized at approximately 1000 m²/g, which is typically reported for materials of this type. Further characterization of the sample will be conducted following repair of the X-Ray Diffractometer
Alternative formulations of regenerable flue gas cleanup catalysts( )

4 editions published between 1991 and 1992 in English and held by 0 WorldCat member libraries worldwide

We have used non-aqueous impregnation techniques to prepare an aluminum oxide surface covered with a well-dispersed magnesium oxide layer using magnesium acetylacetonate dehydrate [Mg(acac)[sub 2][sm bullet]2H[sub 2]0] as a precursor. Using lithium acetylacetonate as a precursor, we have begun attempts to prepare a similarly well dispersed surface layer of lithium oxide.'' We have generated higher weight loadings of magnesium on alumina by using a Soxhlet extractor to dissolve the sparingly soluble Mg(acac)[sub 2][sm bullet]2H[sub 2]0 in methanol. With this device we are able to obtain loadings of MgO on the alumina up to 0.66 wt/wt%. The precursor samples were examined by diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and our results indicate that the complex loses the water of hydration upon adsorption. It appears, however, that the initial form of the complex on the surface is as anhydrous crystallites. Heating the supported precursor under vacuum leads to melting'' of the crystals, which can be observed by DRIFTS. Decomposition of the precursor under nitrogen or air leads to very similar activity when adsorbing SO[sub 2]. SO[sub 2] uptake appears to be independent of whether O[sub 2] is Present in the gas stream or not. We have shown that SO[sub 2] adsorption increases with Mg-loading on the impregnated aluminas, with 0.85 additional molecules Of SO[sub 2] adsorbed for each additional Mg atom (or MgO molecule) on the surface. We have shown that non-aqueous impregnation leads to samples which are more efficient with regard to SO[sub 2] uptake per magnesium atom than aqueous impregnation
The role of catalyst precursor anions in coal gasification. Eighth quarterly report, [July--September 1993]( )

7 editions published between 1992 and 1994 in English and held by 0 WorldCat member libraries worldwide

This project seeks to understand the roles of various aqueous soluble catalyst precursor anions, specifically acetate (CH₃COO⁻), chloride (Cl⁻), nitrate (NO₃⁻), sulfate (SO₄²⁻) and carbonate (CO₃²⁻) anions on the surface electrical properties of coal and to ascertain the effects of the surface charge on the adsorption, dispersion and activities of calcium and potassium. In the foregoing quarter, the effects of nitrate anion on the surface electrochemistry of the demineralized samples of the coal (North Dakota lignite, PSOC 1482) has been conducted using calcium or potassium nitrates. Demineralization increased the negative surface charge density on the coal compared to that on the original unleached sample. However, addition of Ca(NO₃)2 or KNO₃ reduced the negative charge density, the effect is more pronounced with increase in the precursor concentration due to the adsorption of the metal ion onto the coal surface. These results were confirmed by metal adsorption studies, as reported in a previous report. Surface area measurements using nitrogen adsorption and the BET equation shows a 50% reduction in the surface area compared to that of the original coal. This phenomenon is attributed, primarily, to the removal of finely divided, high surface area siliceous materials from the coal
TOWARDS A NEW CLASS OF MESOPOROUS MATERIALS FOR APPLICATIONS IN PETROLEUM REFINING( )

1 edition published in 2005 in English and held by 0 WorldCat member libraries worldwide

This project focuses on the synthesis of mesoporous aluminophosphates, silicates and aluminosilicates as catalysts for applications in the conversion of large petroleum feedstock compounds to useful middle distillates and naphtha transportation fuels. Summarized herein is our research progress from September 1, 2003, to August 31, 2004. In previous reports it was demonstrated that mesoporous aluminophosphates with neutral framework (containing Al, P and O) could be synthesized, but their thermal stabilities were limited. In general, the materials' pore structure collapsed when calcined at 500-550 C in air or extracted in ethanol/HCl mixture to remove the surfactants, which were used as synthesis templates. New methods to improve the thermal stability of the materials needed to be explored. It was conceived that by adding divalent metals cations, such as Mg and Co, not only that the acid sites would be created by balancing the negatively charged framework (balanced by H), but the thermal stability of the materials would be improved. In addition, methods to facilitate the interaction of hydrocarbon substrates with acid sites within the mesoporous are also needed. One concept towards improving this was to incorporate organic functional groups within or attached to the otherwise purely inorganic aluminophosphate (containing Co or Mg) or aluminosilicate pore walls of the mesopores. In the last report we detailed that mesoporous organosilicates were synthesized using block copolymer under acid conditions containing silica and phenylene ( -C₆H₄. Materials prepared with phenylene group among the silica pore walls was found to be thermally stable up to 550 C which is almost 100 C higher than the temperature used for the mild hydrocracking of petroleum. It was also highlighted that this area was the subject of recent intense research activities by other researchers. Building on precedence of the last report and on the results of other researchers, we investigated the synthesis of a wide range of mesoporous silicates containing different organic functionalities within the pore walls (using -CH₂CH₂₋, simultaneously combined with additional organic functional groups extended within the mesopores and grafted through silicate linkages to the pore walls (including (SiO)₃-CH{sub n}SH, (SiO)₃-CH{sub n}NH (SiO)₃-CH{sub n}IM and (SiO)₃-CH{sub n}C₆H₄, X is imidazole) for use as potential acid catalysts in petroleum upgrading. Based on modifications to published procedures, we synthesized organic functionalized mesoporous organosilicates described above with surface area greater that 700 m²/g, pore volume> 0.73 cm³. The materials were stable to ethanolic extraction, but showed various degrees of thermal stability depending on the nature of the organic groups attached. We also investigated the synthesis of a wide range of mesoporous alumiophosphate containing Mg and Co in the matrix. Synthesis was also conducted on organic functionalized aluminophosphates containing similar organic functionalities described above. Syntheses of the phosphates was conducted in basic conditions with cationic surfactant, namely C₁₆H₃₃N(CH₃)Cl as templates. However, the structure of all the aluminophosphates appear to collapse when the template was removed by extraction or calcination. The catalytic testing phase of the project has commenced with the assembly of a microreactor interfaced with a gas chromatograph. Further research will be focused on use the microreactor to evaluate those potential mesoporous aluminosilicate and alumiophosphate catalyst materials which has maintained some stability, as detailed in this and previous reports, and will also be focused on investigating alternative synthesis approach to strengthen the thermal stability of the aluminophosphates
 
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Alternative Names

controlled identityAtlanta University

controlled identityClark College

Atlanta University Center Clark Atlanta University

Atlanta University Center (Ga.) Clark Atlanta University

CAU

Clark University Atlanta, Ga

Universidade de Atlanta

université Clark-Atlanta université privée américaine

クラーク・アトランタ大学

克拉克亞特蘭大大學

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English (72)

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