National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Model of Diffusers/Permeators for Hydrogen Processing.

DE2007915112

Publication Date	2007
Personal Author	Jacobs, W. D.; Hang, T.
Page Count	5
Abstract	Palladium-silver (Pd-Ag) diffusers are mainstays of hydrogen processing. Diffusers separate hydrogen from inert species such as nitrogen, argon or helium. The tubing becomes permeable to hydrogen when heated to more than 250oC and a differential pressure is created across the membrane. The hydrogen diffuses better at higher temperatures. Experimental or experiential results have been the basis for determining or predicting a diffusers performance. However, the process can be mathematically modeled, and comparison to experimental or other operating data can be utilized to improve the fit of the model. A reliable model-based diffuser system design is the goal which will have impacts on tritium and hydrogen processing. A computer model has been developed to solve the differential equations for diffusion given the operating boundary conditions. The model was compared to operating data for a low pressure diffuser system. The modeling approach and the results are presented in this paper.
Keywords	Diffusers Permeators Hydrogen processing Models Reliability Diffusion Permeation Differential equations Modeling Palladium-silver (Pd-Ag) diffusers Model-based diffuser system designs
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Savannah River National Lab., Aiken, SC.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200802
Contract Number	DE-AC09-96SR18500

Model of Diffusers/Permeators for Hydrogen Processing.

Model of Diffusers/Permeators for Hydrogen Processing.
DE2007915112

Publication Date	2007
Personal Author	Jacobs, W. D.; Hang, T.
Page Count	5
Abstract	Palladium-silver (Pd-Ag) diffusers are mainstays of hydrogen processing. Diffusers separate hydrogen from inert species such as nitrogen, argon or helium. The tubing becomes permeable to hydrogen when heated to more than 250oC and a differential pressure is created across the membrane. The hydrogen diffuses better at higher temperatures. Experimental or experiential results have been the basis for determining or predicting a diffusers performance. However, the process can be mathematically modeled, and comparison to experimental or other operating data can be utilized to improve the fit of the model. A reliable model-based diffuser system design is the goal which will have impacts on tritium and hydrogen processing. A computer model has been developed to solve the differential equations for diffusion given the operating boundary conditions. The model was compared to operating data for a low pressure diffuser system. The modeling approach and the results are presented in this paper.
Keywords	Diffusers Permeators Hydrogen processing Models Reliability Diffusion Permeation Differential equations Modeling Palladium-silver (Pd-Ag) diffusers Model-based diffuser system designs
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Savannah River National Lab., Aiken, SC.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200802
Contract Number	DE-AC09-96SR18500