3,402 Matching Results

Search Results

Results: 1 - 24 next
open access

Progress in the Los Alamos Scientific Laboratory program to develop thermochemical processes for hydrogen production. [Oxide-sulfate cycles; sulfuric acid cycles; bromide-sulfate cycles; sulfuric acid-sulfur cycles; hybrid cycles]

Description: The Los Alamos Scientific Laboratory Program to develop thermochemical processes for hydrogen production is based on attempts to develop criteria required of an ideal process and to search for types of thermochemical cycles that approximate these criteria. The advantages of reactions with large entropy changes have been demonstrated. The necessity for experimental verification of conceptual cycles has become apparent from the program. This necessity has been stressed in the paper. It should be … more
Date: January 1, 1976
Creator: Bowman, M. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Chemistry of thermochemical cycles from U. S. A. programs. [Review of ERDA-sponsored work]

Description: Theoretical advantages for hydrogen production by thermochemical methods have stimulated many efforts to ''invent,'' test and/or perform engineering and economic evaluation of thermochemical processes. A large number of thermochemical cycles have been conceived. Unfortunately, many have been published without experimental verification of the reactions in the cycle. As a result of this, most evaluations and/or comparisons of thermochemical processes for process efficiency or cost have been based… more
Date: January 1, 1976
Creator: Bowman, M. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Use of Oxides in Thermochemical Water-Splitting Cycles for Solar Heat Sources. Recent Results on the Copper Oxide Cycle

Description: Additional results on the low temperature reactions for reforming CuO from Cu/sub 2/O are presented. These results pertain to the following reaction in the copper oxide cycle: I/sub 2/ + Cu/sub 2/O + Mg(OH)/sub 2/ = 2CuO + MgI/sub 2/(aq) + H/sub 2/O at 448/sup 0/K, ..delta..G/sup 0/ = -78.5. 4 references, 4 figures.
Date: 1984
Creator: Jones, W. M. & Bowman, M. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Overview of nonelectrical applications of fusion

Description: The potential for, and importance of, nonelectrical applications of fusion energy is discussed. Three possibilities are reviewed in some detail: fusion-fission hybrids for fissile fuel production; high-temperature electrolysis and thermochemical processes for hydrogen production; and high-temperature steam for coal gasification. The hybrid could be an early application of fusion if this route is identified as a desirable goal. Hydrogen production and coal gasification processes appear feasible … more
Date: January 1, 1979
Creator: Miley, George H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Synfuel (hydrogen) production from fusion power

Description: A potential use of fusion energy for the production of synthetic fuel (hydrogen) is described. The hybrid-thermochemical bismuth-sulfate cycle is used as a vehicle to assess the technological and economic merits of this potential nonelectric application of fusion power.
Date: January 1, 1979
Creator: Krakowski, R. A.; Cox, K. E.; Pendergrass, J. H. & Booth, L. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Improved efficiency in thermochemical hydrogen cycles through decreasing the use of solvent water. Consideration of the sulfur dioxide: iodine cycle

Description: This paper considers the relationship between evaporation and efficiency and examines experimentally an adaptation of the sulfur dioxide-iodine cycle where little water needs to be evaporated or condensed.
Date: January 1, 1982
Creator: Mason, C.F.V. & Bowman, M.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Thermochemical processes for solar hydrogen production

Description: The use of solar energy to produce hydrogen from water is an attractive concept that merits a continuing research and development effort. The base technology being developed for solar thermal power can be applied effectively in the production of hydrogen from water. Hydrogen production could be based on advanced water electrolysis and economic solar hydrogen become an eventual reality even if advanced processes do not prove to be feasible. Thermochemical cycles for decomposing water promise hig… more
Date: January 1, 1982
Creator: Bowman, M.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Thermochemical processes for hydrogen production by water decomposition. Final report

Description: The principal contributions of the research are in the area of gas-solid reactions, ranging from models and data interpretation for fundamental kinetics and mixing of solids to simulations of engineering scale reactors. Models were derived for simulating the heat and mass transfer processes inside the reactor and tested by experiments. The effects of surface renewal of solids on the mass transfer phenomena were studied and related to the solid mixing. Catalysis by selected additives were studie… more
Date: August 1, 1980
Creator: Perlmutter, D.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Thermochemical processes for hydrogen production by water decomposition. Progress report, April 1--December 31, 1975

Description: The interest in hydrogen as a chemical feedstock and as a possible non-polluting fuel has continued to be high, affected by recent estimates of 1980 prices for imported natural gas in the range of $3.00/MM Btu. Our exhaustive survey of multi-step thermochemical and hybrid cycles concluded that the most promising prospects to date are (1) a modification of Abraham's ANL-4 cycle, and (2) the Rohm and Haas multi-reaction, single reactor cycle. Both sequences utilize iodine-based oxidation-reductio… more
Date: December 1, 1975
Creator: Perlmutter, D. D. & Myers, A. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Use of oxides in thermochemical water-splitting cycles for solar heat sources: copper oxides

Description: Cycles using solid oxide decomposition as the high temperature step may have advantages for coupling with a solar furnace. The CuO-Cu/sub 2/O cycle consists of the following steps: 2 CuO = Cu/sub 2/O + 1/2 O/sub 2/ (1300/sup 0/K); I/sub 2/ + Cu/sub 2/O + Mg(OH)/sub 2/ = 2 CuO + Mg I/sub 2/ + H/sub 2/O (448/sup 0/K); MgI/sub 2/ + H/sub 2/O = MgO + 2 HI(g); 2 HI = H/sub 2/ + I/sub 2/; and MgO + H/sub 2/O = Mg(OH)/sub 2/. The stages in the second reaction are discussed. The oxidation of CuI to CuO… more
Date: January 1, 1983
Creator: Jones, W.M. & Bowman, M.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Present and future status of thermochemical cycles applied to fusion energy sources

Description: This paper reviews the status of current research on thermochemical hydrogen production cycles and identifies the needs for advanced cycles and materials research. The Los Alamos Scientific Laboratory (LASL) bismuth sulfate thermochemical cycle is characterized, and fusion reactor blanket concepts for both inertial and magnetic confinement schemes are presented as thermal energy sources for process heat applications.
Date: January 1, 1980
Creator: Booth, L. A.; Cox, K. E.; Krakowski, R. A. & Pendergrass, J. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Design of GA thermochemical water-splitting process for the Mirror Advanced Reactor System

Description: GA interfaced the sulfur-iodine thermochemical water-splitting cycle to the Mirror Advanced Reactor System (MARS). The results of this effort follow as one section and part of a second section to be included in the MARS final report. This section describes the process and its interface to the reactor. The capital and operating costs for the hydrogen plant are described.
Date: April 1, 1983
Creator: Brown, L.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Synfuels From Fusion: Producing Hydrogen With the Tandem Mirror Reactor and Thermochemical Cycles

Description: This volume contains the following sections: (1) the Tandem Mirror fusion driver, (2) the Cauldron blanket module, (3) the flowing microsphere, (4) coupling the reactor to the process, (5) the thermochemical cycles, and (6) chemical reactors and process units. (MOW)
Date: January 21, 1981
Creator: Werner, R. W. & Ribe, F. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

CATALYST EVALUATION FOR A SULFUR DIOXIDE-DEPOLARIZED ELECTROLYZER

Description: Thermochemical processes are being developed to provide global-scale quantities of hydrogen. A variant on sulfur-based thermochemical cycles is the Hybrid Sulfur (HyS) Process which uses a sulfur dioxide depolarized electrolyzer (SDE) to produce the hydrogen. Testing examined the activity and stability of platinum and palladium as the electrocatalyst for the SDE in sulfuric acid solutions. Cyclic and linear sweep voltammetry revealed that platinum provided better catalytic activity with much lo… more
Date: January 31, 2007
Creator: Hobbs, D & Hector Colon-Mercado, H
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

LASL thermochemical hydrogen program status on October 31, 1977. [Cycles using sulfuric acid as an intermdiate]

Description: The LASL Hydrogen Program is continuing its investigation of practical schemes to decompose water thermochemically for hydrogen production. Efforts were and are being devoted to process improvements in cycles that use sulfuric acid as an intermediate. Sulfuric acid-hydrogen bromide cycles are being studied as a means of overcoming the heat penalty in drying acid solutions. An alternate approach involves the use of insoluble bismuth sulfate that is precipitated from acid solution. Preliminary en… more
Date: January 1, 1977
Creator: Cox, K.E. & Bowman, M.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Conceptual design study FY 1981: synfuels from fusion - using the tandem mirror reactor and a thermochemical cycle to produce hydrogen

Description: This report represents the second year's effort of a scoping and conceptual design study being conducted for the express purpose of evaluating the engineering potential of producing hydrogen by thermochemical cycles using a tandem mirror fusion driver. The hydrogen thus produced may then be used as a feedstock to produce fuels such as methane, methanol, or gasoline. The main objective of this second year's study has been to obtain some approximate cost figures for hydrogen production through a … more
Date: February 9, 1982
Creator: Krikorian, O.H. (ed.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Catalytic-cartridge SO/sub 3/ decomposer

Description: A catalytic cartridge internally heated is utilized as a SO/sub 3/ decomposer for thermochemical hydrogen production. The cartridge has two embodiments, a cross-flow cartridge and an axial flow cartridge. In the cross-flow cartridge, SO/sub 3/ gas is flowed through a chamber and incident normally to a catalyst coated tube extending through the chamber, the catalyst coated tube being internally heated. In the axial-flow cartridge, SO/sub 3/ gas is flowed through the annular space between concent… more
Date: May 22, 1981
Creator: Galloway, Terry R.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
Back to Top of Screen