WorldCat Identities

Clark Atlanta University

Overview
Works: 1,703 works in 1,738 publications in 1 language and 4,302 library holdings
Genres: Periodicals  Catalogs  Conference papers and proceedings  Criticism, interpretation, etc 
Roles: Researcher
Classifications: E185.5, 909.0496005
Publication Timeline
.
Most widely held works by Clark Atlanta University
Phylon( )

in English and held by 1,358 WorldCat member libraries worldwide

The Status of Black Atlanta( )

in English and held by 95 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 82 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 78 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 64 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 )

1 edition published in 1990 in English and held by 7 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 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
The role of catalyst precursor anions in coal gasification. Tenth quarterly report( )

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

The aims of the proposed project are to enrich our understanding of the roles of various aqueous soluble catalyst precursor anions on the surface electrical properties of coal and to ascertain the influence of the surface charge on the adsorption, dispersion, and activities of calcium and potassium. These goals will be achieved by impregnating a North Dakota lignite (PSOC 1482) and its demineralized derivative with calcium or potassium catalyst precursors containing acetate (CH₃COO⁻), chloride (Cl⁻), nitrate (NO₃⁻), sulfate (SO₄²⁻), and carbonate (CO₃²⁻) anions. Catalyst loading will be conducted under well-controlled conditions of solution pH and ionic strength. In the last quarter, the surface charge properties of the coal was determined as a function of acetate (CH₃COO⁻), chloride (Cl⁻), nitrate (NO³⁻), carbonate (CO₃²⁻) or sulfate (SO₄²⁻)concentration using the respective potassium salts of these anions. In general, low anion concentrations (10⁻³ or 10⁻² mol/L) had little effect on the zeta potentials of the coals. However, the surface charge densities of the coal become less negative at 10-1 mol/L of the nitrate, carbonate or sulfate anions. These trends suggest that the surface charge density of the coal is controlled by the adsorption of potassium ions (K) onto the coal particles. The net negative charge on the coal panicles creates a repulsive force between the anions and the coal surface and prevents the anions from exerting any significant effect on the coal's electrokinetic properties
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
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
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
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 MESOPOROUS ALUMINOPHOSPHATES AS POTENTIAL CATALYSTS IN THE UPGRADING PETROLEUM FEEDSTOCKS( )

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

A comprehensive investigation was conducted towards the synthesis and catalytic evaluation of high surface areas, uniform pore size, mesoporous aluminophosphates (AlPO₄) as potential catalysts for the upgrading of heavy petroleum feedstock, such as heavy crudes and petroleum residuum. The influence of several synthesis variables (including, the nature of the reactants, chemical composition of reaction mixtures, time and temperature) on the synthesis and physicochemical characteristics of the resulting products was explored. Phosphoric acid and three different aluminum sources, namely, aluminum hydroxide, aluminum isopropoxide and psuedobohemite alumina, were used as the inorganic precursors. Cetyltrimethylammonium chloride (C₁₆TACl) surfactant was used as charge compensating cation and structure directing agent in the surfactant-micellar-mediated synthesis pathway employed. Synthesis were conducted from reaction mixtures within the following typical molar composition range: xAl₂O₃:P₂O₅:yC₁₆TMACl: zTHMAOH: wH₂O, where x = 0.29-2.34, y = 0.24-0.98, z = 0.34-1.95, w = 86-700. Selected materials were evaluated for the conversion of isopropylbenzene (cumene) in order to understand the nature of any acid sites created. The synthesis products obtained depended strongly on the molar composition of the synthesis mixture. A lamellar (layered) phase was favored by synthesis mixtures comprised of low Al/P ratios (<0.33), low TMAOH content, high C₁₆TACl concentrations and high synthesis temperature (110 C). Formation of the desired hexagonal (tubular) phase was favored by higher Al/P ratios and TMAOH content, pH range between 8-10, low C₁₆TACl concentration and ambient temperature. The aluminum source had significant influence on the products obtained. With aluminum hydroxide (A1(OH)₃) as the hydroxide source, the resulting hexagonal phase in the ''as-synthesized'' form demonstrated well defined ordered mesoporous structure for synthesis mixtures of Al/P ratios in the range of 0.47-1.25, above which increasingly disordered products were observed. The products were however unstable to calcination in air above 400 C to remove the organic template, under which structural collapsed was observed. Products formed using pseudoboehmite alumina (catapal B), were more thermally stable than those formed with aluminum isopropoxide, though all products experienced some degree of structural collapsed on calcination and yielded micro- or micro-mesoporous materials ranging from low (<500 m²/g) to high surface areas (>500 m²/g) and pore sizes ranging from microporous (<1.5 nm) in some products to mesoporous (up to 3.6 nm) in other. Improvement in thermal stability was not observed when Mg and Co or bridging organic functional groups were incorporated with the mesoporous framework. The products showed negligible activity for the conversion of cumene at 300 C. Further research is necessary to investigate alternative synthesis strategies to strengthen and improve the thermal stabilities of these aluminophosphates
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
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

The major source of man-made SO₂ in the atmosphere is the burning of coal for electric power generation. Coal-fired utility plants are also large sources of NO(subscript x) pollution. Regenerable flue gas desulfurization/NO(subscript x) abatement catalysts provide one mechanism of simultaneously removing SO₂ and NO(subscript x) species from flue gases released into the atmosphere. The purpose of this project is to examine routes of optimizing the adsorption efficiency, the adsorption capacity, and the ease of regeneration of regenerable flue gas cleanup catalysts. We are investigating two different mechanisms for accomplishing this goal. The first involves the use of different alkali and alkaline earth metals as promoters for the alumina sorbents to increase the surface basicity of the sorbent and thus adjust the number and distribution of adsorption sites. The second involves investigation of non-aqueous impregnation, as opposed to aqueous impregnation, as a method to obtain an evenly dispersed monolayer of the promoter on the surface
 
moreShow More Titles
fewerShow Fewer Titles
Audience Level
0
Audience Level
1
  Kids General Special  
Audience level: 0.35 (from 0.12 for Literary m ... to 1.00 for Black Wome ...)

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

Ատլանտայի համալսարան

クラーク・アトランタ大学

克拉克亞特蘭大大學

Languages
English (71)

Covers