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New Nanophase Iron-Based Catalysts for Hydrocracking Applications

Published online by Cambridge University Press:  15 February 2011

Dean W. Matson ,
John C. Linehan ,
John G. Darab ,
Donald M. Camaioni ,
S. Thomas Autrey  and
Eddie G. Lui
Dean W. Matson
Affiliation:
Pacific Northwest Laboratory [1], PO Box 999, Richland, WA 99352
John C. Linehan
Affiliation:
Pacific Northwest Laboratory [1], PO Box 999, Richland, WA 99352
John G. Darab
Affiliation:
Pacific Northwest Laboratory [1], PO Box 999, Richland, WA 99352
Donald M. Camaioni
Affiliation:
Pacific Northwest Laboratory [1], PO Box 999, Richland, WA 99352
S. Thomas Autrey
Affiliation:
Pacific Northwest Laboratory [1], PO Box 999, Richland, WA 99352
Eddie G. Lui
Affiliation:
Pacific Northwest Laboratory [1], PO Box 999, Richland, WA 99352
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Abstract

Carbon-carbon bond cleavage catalysts produced in situ at reaction conditions from nanocrystalline hydrated iron oxides, show high activity and selectivity in model compound studies. Two highly active catalyst precursors, ferric oxyhydroxysulfate (OHS) and 6-line ferrihydrite, can be produced by a flow-through hydrothermal powder synthesis method, the Rapid Thermal Decomposition of precursors in Solution (RTDS) process. Model compound studies indicate that both catalyst precursors are active at a 400°C reaction temperature, but that there are significant differences in their catalytic characteristics. The activity of 6-line ferrihydrite is highly dependent on the particle (aggregate) size whereas the activity of the OHS is essentially independent of particle size. These differences are attributed to variations in the crystallite aggregation and particle surface characteristics of the two catalyst precursor materials. Catalytic activity is retained to lower reaction temperatures in tests using OHS than in similar tests using 6-line ferrihydrite.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 368: Symposium T – Synthesis and Properties of Advanced Catalytic Materials , 1994 , 243
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

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