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Title: Catalytic carbon membranes for hydrogen production

Commercial carbon composite microfiltration membranes may be modified for gas separation applications by providing a gas separation layer with pores in the 1- to 10-nm range. Several organic polymeric precursors and techniques for depositing a suitable layer were investigated in this project. The in situ polymerization technique was found to be the most promising, and pure component permeation tests with membrane samples prepared with this technique indicated Knudsen diffusion behavior. The gas separation factors obtained by mixed-gas permeation tests were found to depend strongly on gas temperature and pressure indicating significant viscous flow at high-pressure conditions. The modified membranes were used to carry out simultaneous water gas shift reaction and product hydrogen separation. These tests indicated increasing CO conversions with increasing hydrogen separation. A simple process model was developed to simulate a catalytic membrane reactor. A number of simulations were carried out to identify operating conditions leading to product hydrogen concentrations over 90 percent. (VC)
Authors:
;
Publication Date:
OSTI Identifier:
5148824
Report Number(s):
DOE/MC/26034-3083
ON: DE92001269
DOE Contract Number:
AC21-89MC26034
Resource Type:
Technical Report
Research Org:
Research Triangle Inst., Research Triangle Park, NC (United States)
Sponsoring Org:
DOE; USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; 01 COAL, LIGNITE, AND PEAT; HYDROGEN; PRODUCTION; MEMBRANES; DESIGN; TESTING; CARBON; CARBON MONOXIDE; COMPOSITE MATERIALS; DEPOSITION; MATHEMATICAL MODELS; PERMEABILITY; POLYMERS; POROSITY; PRESSURE DEPENDENCE; PROGRESS REPORT; SEPARATION PROCESSES; SHIFT PROCESSES; SIMULATION; TEMPERATURE DEPENDENCE; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; DOCUMENT TYPES; ELEMENTS; MATERIALS; NONMETALS; OXIDES; OXYGEN COMPOUNDS 080107* -- Hydrogen-- Production-- Coal Gasification; 010402 -- Coal, Lignite, & Peat-- Purification & Upgrading; 010404 -- Coal, Lignite, & Peat-- Gasification