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Title: Catalytic molten metals for the direct conversion of methane to hydrogen and separable carbon

Abstract

Metals that are active catalysts for methane (Ni, Pt, Pd), when dissolved in inactive low–melting temperature metals (In, Ga, Sn, Pb), produce stable molten metal alloy catalysts for pyrolysis of methane into hydrogen and carbon. All solid catalysts previously used for this reaction have been deactivated by carbon deposition. In the molten alloy system, the insoluble carbon floats to the surface where it can be skimmed off. A 27% Ni–73% Bi alloy achieved 95% methane conversion at 1065°C in a 1.1-meter bubble column and produced pure hydrogen without CO 2 or other by-products. Calculations show that the active metals in the molten alloys are atomically dispersed and negatively charged. There is a correlation between the amount of charge on the atoms and their catalytic activity.

Authors:
ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1436909
Grant/Contract Number:  
FG03-89ER14048
Resource Type:
Published Article
Journal Name:
Science
Additional Journal Information:
Journal Name: Science Journal Volume: 358 Journal Issue: 6365; Journal ID: ISSN 0036-8075
Publisher:
American Association for the Advancement of Science (AAAS)
Country of Publication:
United States
Language:
English

Citation Formats

Upham, D. Chester, Agarwal, Vishal, Khechfe, Alexander, Snodgrass, Zachary R., Gordon, Michael J., Metiu, Horia, and McFarland, Eric W. Catalytic molten metals for the direct conversion of methane to hydrogen and separable carbon. United States: N. p., 2017. Web. doi:10.1126/science.aao5023.
Upham, D. Chester, Agarwal, Vishal, Khechfe, Alexander, Snodgrass, Zachary R., Gordon, Michael J., Metiu, Horia, & McFarland, Eric W. Catalytic molten metals for the direct conversion of methane to hydrogen and separable carbon. United States. doi:10.1126/science.aao5023.
Upham, D. Chester, Agarwal, Vishal, Khechfe, Alexander, Snodgrass, Zachary R., Gordon, Michael J., Metiu, Horia, and McFarland, Eric W. Thu . "Catalytic molten metals for the direct conversion of methane to hydrogen and separable carbon". United States. doi:10.1126/science.aao5023.
@article{osti_1436909,
title = {Catalytic molten metals for the direct conversion of methane to hydrogen and separable carbon},
author = {Upham, D. Chester and Agarwal, Vishal and Khechfe, Alexander and Snodgrass, Zachary R. and Gordon, Michael J. and Metiu, Horia and McFarland, Eric W.},
abstractNote = {Metals that are active catalysts for methane (Ni, Pt, Pd), when dissolved in inactive low–melting temperature metals (In, Ga, Sn, Pb), produce stable molten metal alloy catalysts for pyrolysis of methane into hydrogen and carbon. All solid catalysts previously used for this reaction have been deactivated by carbon deposition. In the molten alloy system, the insoluble carbon floats to the surface where it can be skimmed off. A 27% Ni–73% Bi alloy achieved 95% methane conversion at 1065°C in a 1.1-meter bubble column and produced pure hydrogen without CO 2 or other by-products. Calculations show that the active metals in the molten alloys are atomically dispersed and negatively charged. There is a correlation between the amount of charge on the atoms and their catalytic activity.},
doi = {10.1126/science.aao5023},
journal = {Science},
number = 6365,
volume = 358,
place = {United States},
year = {2017},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1126/science.aao5023

Citation Metrics:
Cited by: 28 works
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