David W. DeBerry

Crystal Pharmatech (United States)

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

A. Viehbeck

IBM Research - Thomas J. Watson Research Center

Girish Srinivas

Sandia National Laboratories

Steven C. Gebhard

Eugene Research Institute

W. Scott Clark

National Aboriginal Diabetes Association

Gary R. Peyton

Illinois Department of Natural Resources

T.W. Trofe

Dwyann Dalrymple

Halliburton (United Kingdom)

John R. Currie

Lake County Schools

D. C. Jones

Los Alamos National Laboratory

Chacko Thomas

Murdoch University

Cooperative Institutions

TDA Research (United States)

Crystal Pharmatech (United States)

University of Colorado Boulder

The University of Texas at Austin

Rice University

Radiant Research (United States)

Lake County Schools

Lagos State Health Service Commission

Eugene Research Institute

University of Southern California

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Electrochemistry of Prussian Blue Films on Metal and Semiconductor Electrodes

Journal of The Electrochemical Society (1985)

A. Viehbeck David W. DeBerry

The electrochemical properties of Prussian blue films on Pt and spark anodized n‐type electrodes were investigated. Evidence for four redox states for Prussian blue was obtained. While the oxidation of Everitt's salt to Prussian blue involves the high spin iron atoms, the oxidation of Prussian blue to Berlin green and Berlin green to Prussian yellow involves the low spin hexacyanoferrate groups. The Prussian blue/Everitt's salt redox system ( vs. SCE) is the most stable and reversible couple. The diffusion coefficients for reduction and oxidation of this redox couple are, respectively. The photoelectrochromic behavior of Prussian blue on semiconductor electrodes is discussed. The films deposited on have short‐circuit memory, and lateral color spreading through the film is slow. A light addressable electrochromic display is described.

Prussian blue

10.1149/1.2114118

Cite

Citations (55)

Materials selection guidelines for geothermal power systems. First edition

David W. DeBerry Peter F. Ellis Chacko Thomas

Nine potential power cycles are defined and diagrammed for the generation of electricity from geothermal fluids. General fluid properties that influence the applicability of power cycles to a particular geothermal resource are discussed. The corrosivity of individual process streams in power cycles is described based on variations in chemical composition and temperature. Results of materials performance tests are analyzed based on the chemical composition of the corrosive medium and physical factors such as temperature, duration of exposure, and fluid velocity. The key chemical components in geothermal fluids that are significant in determining corrosivity are identified. Both summarized and detailed results of materials performance tests in U.S. liquid-dominated resources are given. Seven U.S. liquid-dominated KGRA's are classified according to relative corrosiveness and their key chemical components are defined. The various forms and mechanisms of corrosive attack that can occur in geothermal process streams are described. The application of nonmetallic materials in geothermal environments is discussed. The appendices contain information on (1) operating experience at geothermal power plants, (2) corrosion in desalination facilities, (3) reliability of geothermal plants, (4) elastomeric materials, (5) comparative alloy costs, and (6) geothermal equipment manufacturers. (MHR)

Geothermal power

Geothermal desalination

10.2172/6356102

Cite

Citations (7)

Effect of Temperature on the Electrochemical Kinetics of Gadolinium in the Curie Region

Journal of The Electrochemical Society (1976)

David W. DeBerry Norman Hackerman

Anodic dissolution and hydrogen evolution kinetics of Gd were investigated over the range 5°–30°C. Reaction orders with respect to pH for the HER and for anodic dissolution of Gd are temperature independent, as are the transfer coefficients. The apparent activation energy of anodic dissolution changes at the Curie temperature with that above 17°C being smaller. The change for the HER is almost the same but in the opposite direction. For both reactions there is a simultaneous change in the preexponential factor, yielding a practically smooth over‐all vs. 1/T curve. This behavior can be rationalized by addition of a ferromagnetic energy term to the activation energies. A model is proposed based on the existence of paramagnetic surface layers below the Curie temperature and the consequent introduction of an energy gradient for the transport of electrons to and from the metal surface.

Atmospheric temperature range

10.1149/1.2133029

Cite

Citations (3)

Rates of reaction of SO₂ with metal oxides

The Canadian Journal of Chemical Engineering (1971)

David W. DeBerry Karl J. Sladek

Abstract Rates of sorption of SO 2 from synthetic flue gas by 14 metal oxides were determined. These oxides had been selected for their potential applicability to processes for removing SO 2 from flue gas using thermal regeneration of sorbent. Measurements were performed using thermogravimetric analysis, and rates were fitted to semi‐empirical expressions; CeO 2 , Co 3 O 4 , Cr 2 O 3 , CuO, Fe 2 O 3 , and NiO displayed measurable rates in the range 200° to 500°C, and were converted to sulphates. Rates were immeasurably small at 25° to 800°C for Al 2 O 3 , Sb 2 O 5 , SnO 2 , TiO 2 , V 2 O 5 , WO 3 , ZnO, and ZrO 2 , CuO and CeO 2 showed the highest rates

Non-blocking I/O

Thermogravimetric analysis

Flue

10.1002/cjce.5450490612

Cite

Citations (28)

ChemInform Abstract: Inhibition of Pitting of Type 304L Stainless Steel by N-Lauroylsarcosine.

Chemischer Informationsdienst (1986)

David W. DeBerry A. Viehbeck

Abstract Addition of N‐lauroylsarcosine (NLS) to an aggressive Cl′ solution increases the resistance of type 304L stainless steel to localized passivity breakdown and active pitting corrosion.

Pitting Corrosion

Passivity

10.1002/chin.198619025

Cite

Citations (0)

Chemical evolution of liquid redox processes

Environmental Progress (1997)

David W. DeBerry

Abstract A multitude of processes have been proposed for removal of hydrogen sulfide from gaseous streams. Removal of H 2 S from sour natural gas streams is particularly difficult since low outlet concentrations must be reached before the gas is put into a pipeline. Liquid redox sulfur recovery (LRSR) processes use a solution containing an oxidizing agent that absorbs H 2 S from the gas stream and oxidizes it to sulfur. The chemistry of these processes has undergone considerable evolution in the last 30 years. A number of tradeoffs must be considered in designing LRSR processes. For example, the rate of reaction of the oxidized agent with H 2 S often determines the scrubbing efficiency, but excessive rates of sulfur formation in the scrubber can lead to plugging. Systems based on vanadium and/or anthraquinone disulfonates (ADA) as the redox catalyst had several drawbacks, most of which can be traced to sluggish redox agent kinetics. Current LRSR processes use chelated iron as the catalyst for sulfur recovery. This gives faster scrubbing and re‐oxidation kinetics, but chemical degradation of the chelating agent can affect the economics of the process. Plugging of sorption vessels continues to be a problem in some applications. New nonaqueous solvent‐based or biological processes may overcome these problems.

Oxidizing agent

Data scrubbing

Reducing agent

Claus process

10.1002/ep.3300160316

Cite

Citations (28)

Inhibition of Localized Corrosion as Determined by a Galvanodynamic Method

Journal of The Electrochemical Society (1984)

A. Viehbeck David W. DeBerry

Description de l'inhibition de la corrosion par piqure de l'acier inoxydable 304 L, par un agent chelatant a activite de surface (N-lauroylsarcosine) dans des solutions aqueuses contenant des ions chlorure. L'etude a ete faite par une methode galvanodynamique

10.1149/1.2115973

Cite

Citations (17)

Inhibition of Pitting Corrosion of AISI 304L Stainless Steel by Surface Active Compounds

CORROSION (1988)

David W. DeBerry A. Viehbeck

Abstract A series of compounds having the N-acylamino acid or related structure were investigated as potential inhibitors of localized corrosion of AISI 304L stainless steel (SS). The effect of these compounds on the breakdown potential was measured using the linear current scan method. Interaction of the inhibitors with the electrode surface was studied using capacitance measurements and correlated with solution surface tension measurements. Successful inhibitors interact strongly with the AISI 304L SS surface, but the inhibition effect appears to involve more than just adsorption of the inhibitor. Evidence is presented for the formation of a hemimicellar inhibitor layer, which could exclude chloride ions from the surface or provide surface pH buffering. Formation of such a layer is sensitive to the structure of the compound.

Pitting Corrosion

10.5006/1.3583941

Cite

Citations (21)

Corrosion due to use of carbon dioxide for enhanced oil recovery. Final report. SumX No. 78-003

David W. DeBerry W. Scott Clark

This study documents the specific effects of CO/sub 2/ on corrosion and identifies promising methods for controlling corrosion in fields using CO/sub 2/ injection. Information has been assembled on: CO/sub 2/ corrosion problems in general, surface and downhole corrosion problems specifically associated with CO/sub 2/ enhanced oil recovery, and methods to reduce corrosion problems in CO/sub 2/ environments. Corrosion mechanisms, kinetic behavior, and the effects of various parameters on corrosion by CO/sub 2/ are presented in this study. Engineering metals are not attacked by CO/sub 2/ under oil field environments unless liquid water is also present. Plain and low alloy steels are attacked by mixtures of CO/sub 2/ and liquid water. Attack on these bare metals may become serious at a CO/sub 2/ partial pressure as low as 4 psi and it increases with CO/sub 2/ partial pressure although not in direct proportion. Fluid flow rate is an important factor in CO/sub 2//water corrosion. Practically all stainless steels and similar resistant alloys are not particularly subject to corrosion by CO/sub 2//water mixtures alone, even at high CO/sub 2/ pressures. Elevated levels of CO/sub 2/ can aggravate the corrosive effects of other species such as hydrogen sulfide, oxygen, and chloride. Mixtures of CO/sub 2/, carbon monoxide (CO), and water can cause stress corrosion cracking of plain steels. Corrosion problems in CO/sub 2/ systems should be circumvented when possible by avoiding combination of the corrosive components. Although water cannot be excluded throughout the CO/sub 2/ injection-oil production-CO/sub 2/ and water reinjection chain, air in-leakage can be minimized and oxygen scavengers used to remove any residual. Exclusion of oxygen is important to the successful use of other corrosion control measures. A discussion is given of the main control methods including metal selection, protective coatings and nonmetallic materials, and chemical inhibition. (DLC)

Partial pressure

Anaerobic corrosion

Carbon steel

Iron sulfide

10.2172/5870161

Cite

Citations (6)

HYBRID SULFUR RECOVERY PROCESS FOR NATURAL GAS UPGRADING

Girish Srinivas Steven C. Gebhard David W. DeBerry

This first quarter report of 2002 describes progress on a project funded by the U.S. Department of Energy (DOE) to test a hybrid sulfur recovery process for natural gas upgrading. The process concept represents a low cost option for direct treatment of natural gas streams to remove H{sub 2}S in quantities equivalent to 0.2-25 metric tons (LT) of sulfur per day. This process is projected to have lower capital and operating costs than the competing technologies, amine/aqueous iron liquid redox and amine/Claus/tail gas treating, and have a smaller plant footprint, making it well suited to both on-shore and offshore applications. CrystaSulf{sup SM} (service mark of CrystaTech, Inc.) is a new nonaqueous sulfur recovery process that removes hydrogen sulfide (H{sub 2}S) from gas streams and converts it into elemental sulfur. CrystaSulf features high sulfur recovery similar to aqueous-iron liquid redox sulfur recovery processes, but differs from the aqueous processes in that CrystaSulf controls the location where elemental sulfur particles are formed. In the hybrid process, approximately 1/3 of the total H{sub 2}S in the natural gas is first oxidized to SO{sub 2} at low temperatures over a heterogeneous catalyst. Low temperature oxidation is done so that the H{sub 2}S can be oxidized in the presence of methane and other hydrocarbons without oxidation of the hydrocarbons. The project involves the development of a catalyst using laboratory/bench-scale catalyst testing, and then demonstration of the catalyst at CrystaTech's pilot plant in west Texas. In a previous reporting period tests were done to determine the effect of hydrocarbons such as n-hexane on catalyst performance with and without H{sub 2}S present. The experiments showed that hexane oxidation is suppressed when H{sub 2}S is present. Hexane represents the most reactive of the C1 to C6 series of alkanes. Since hexane exhibits low reactivity under H{sub 2}S oxidation conditions, and more importantly, does not change the SO{sub 2} selectivity, we can conclude that the C1-C6 hydrocarbons should not significantly interfere with the oxidation of H{sub 2}S into SO{sub 2}. During this quarter the effect of aromatic compounds were also found to have no effect on catalyst performance. This report gives the results of testing using contaminants from the pilot plant site.

Natural-gas processing

10.2172/799757

Cite

Citations (1)