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Title: Production of hydrogen by thermocatalytic cracking of natural gas. Task 4 report; Annual report

Abstract

The conventional methods of hydrogen production from natural gas, for example, steam reforming (SR), are complex multi-step processes. These processes also result in the emission of large quantities of CO{sub 2} into the atmosphere. One alternative is the single-step thermocatalytic cracking (TCC) (or decomposition) of natural gas into hydrogen and carbon. The comparative assessment of SR and TCC processes was conducted. Thermocatalytic cracking of methane over various catalysts and supports in a wide range of temperatures (500--900 C) and flow rates was conducted. Two types of fix bed catalytic reactors were designed, built and tested: continuous flow and pulse reactors. Ni-Mo/Alumina and Fe-catalysts demonstrated relatively high efficiency in the methane cracking reaction at the range of temperatures 600--800 C. Fe-catalyst demonstrated fairly good stability, whereas alumina-supported Pt-catalyst rapidly lost its catalytic activity. Methane decomposition reaction over Ni-Mo/alumina was studied over wide range of space velocities in a continuous flow fixed bed catalytic reactor. The experimental results indicate that the hydrogen yield decreases noticeably with an increase in the space velocity of methane. The pulse type catalytic reactor was used to test the activity of the catalysts. It was found that induction period on the kinetic curve of hydrogen production correspondedmore » to the reduction of metal oxide to metallic form of the catalyst. SEM method was used to study the structure of the carbon deposited on the catalyst surface.« less

Publication Date:
Research Org.:
Florida Solar Energy Center, Cocoa, FL (United States)
Sponsoring Org.:
USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)
OSTI Identifier:
564093
Report Number(s):
DOE/AL/85802-T2-Pt.4; FSEC-CR-857-95-Pt.4
ON: DE98002552; TRN: AHC29804%%57
DOE Contract Number:  
FG04-94AL85802
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Oct 1995
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN FUEL; 03 NATURAL GAS; HYDROGEN PRODUCTION; THERMAL CRACKING; NATURAL GAS; PROGRESS REPORT; CATALYSTS; HYDROGEN GENERATORS; DESIGN; PERFORMANCE; NICKEL; MOLYBDENUM; ALUMINIUM OXIDES; IRON; PLATINUM; CATALYTIC EFFECTS; DEACTIVATION; EXPERIMENTAL DATA

Citation Formats

. Production of hydrogen by thermocatalytic cracking of natural gas. Task 4 report; Annual report. United States: N. p., 1995. Web. doi:10.2172/564093.
. Production of hydrogen by thermocatalytic cracking of natural gas. Task 4 report; Annual report. United States. doi:10.2172/564093.
. Sun . "Production of hydrogen by thermocatalytic cracking of natural gas. Task 4 report; Annual report". United States. doi:10.2172/564093. https://www.osti.gov/servlets/purl/564093.
@article{osti_564093,
title = {Production of hydrogen by thermocatalytic cracking of natural gas. Task 4 report; Annual report},
author = {},
abstractNote = {The conventional methods of hydrogen production from natural gas, for example, steam reforming (SR), are complex multi-step processes. These processes also result in the emission of large quantities of CO{sub 2} into the atmosphere. One alternative is the single-step thermocatalytic cracking (TCC) (or decomposition) of natural gas into hydrogen and carbon. The comparative assessment of SR and TCC processes was conducted. Thermocatalytic cracking of methane over various catalysts and supports in a wide range of temperatures (500--900 C) and flow rates was conducted. Two types of fix bed catalytic reactors were designed, built and tested: continuous flow and pulse reactors. Ni-Mo/Alumina and Fe-catalysts demonstrated relatively high efficiency in the methane cracking reaction at the range of temperatures 600--800 C. Fe-catalyst demonstrated fairly good stability, whereas alumina-supported Pt-catalyst rapidly lost its catalytic activity. Methane decomposition reaction over Ni-Mo/alumina was studied over wide range of space velocities in a continuous flow fixed bed catalytic reactor. The experimental results indicate that the hydrogen yield decreases noticeably with an increase in the space velocity of methane. The pulse type catalytic reactor was used to test the activity of the catalysts. It was found that induction period on the kinetic curve of hydrogen production corresponded to the reduction of metal oxide to metallic form of the catalyst. SEM method was used to study the structure of the carbon deposited on the catalyst surface.},
doi = {10.2172/564093},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {10}
}