skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Activation of methane by transition metal-substituted aluminophosphate molecular sieves

Abstract

Aluminophosphate molecular sieves substituted with cobalt, manganese or iron and having the AlPO.sub.4 -34 or AlPO.sub.4 -5, or related AlPO.sub.4 structure activate methane starting at approximately 350.degree. C. Between 400.degree. and 500.degree. C. and at methane pressures .ltoreq.1 atmosphere the rate of methane conversion increases steadily with typical conversion efficiencies at 500.degree. C. approaching 50% and selectivity to the production of C.sub.2+ hydrocarbons approaching 100%. The activation mechanism is based on reduction of the transition metal(III) form of the molecular sieve to the transition metal(II) form with accompanying oxidative dehydrogenation of the methane. Reoxidation of the - transition metal(II) form to the transition metal(III) form can be done either chemically (e.g., using O.sub.2) or electrochemically.

Inventors:
 [1];  [2]
  1. Downers Grove, IL
  2. Naperville, IL
Issue Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
OSTI Identifier:
868076
Patent Number(s):
5068485
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07C - ACYCLIC OR CARBOCYCLIC COMPOUNDS
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
activation; methane; transition; metal-substituted; aluminophosphate; molecular; sieves; substituted; cobalt; manganese; iron; alpo; -34; -5; related; structure; activate; starting; approximately; 350; degree; 400; 500; pressures; ltoreq; atmosphere; rate; conversion; increases; steadily; typical; efficiencies; approaching; 50; selectivity; production; hydrocarbons; 100; mechanism; based; reduction; metal; iii; form; sieve; ii; accompanying; oxidative; dehydrogenation; reoxidation; chemically; electrochemically; molecular sieves; conversion efficiencies; molecular sieve; transition metal; oxidative dehydrogenation; aluminophosphate molecular; /585/502/

Citation Formats

Iton, Lennox E, and Maroni, Victor A. Activation of methane by transition metal-substituted aluminophosphate molecular sieves. United States: N. p., 1991. Web.
Iton, Lennox E, & Maroni, Victor A. Activation of methane by transition metal-substituted aluminophosphate molecular sieves. United States.
Iton, Lennox E, and Maroni, Victor A. Tue . "Activation of methane by transition metal-substituted aluminophosphate molecular sieves". United States. https://www.osti.gov/servlets/purl/868076.
@article{osti_868076,
title = {Activation of methane by transition metal-substituted aluminophosphate molecular sieves},
author = {Iton, Lennox E and Maroni, Victor A},
abstractNote = {Aluminophosphate molecular sieves substituted with cobalt, manganese or iron and having the AlPO.sub.4 -34 or AlPO.sub.4 -5, or related AlPO.sub.4 structure activate methane starting at approximately 350.degree. C. Between 400.degree. and 500.degree. C. and at methane pressures .ltoreq.1 atmosphere the rate of methane conversion increases steadily with typical conversion efficiencies at 500.degree. C. approaching 50% and selectivity to the production of C.sub.2+ hydrocarbons approaching 100%. The activation mechanism is based on reduction of the transition metal(III) form of the molecular sieve to the transition metal(II) form with accompanying oxidative dehydrogenation of the methane. Reoxidation of the - transition metal(II) form to the transition metal(III) form can be done either chemically (e.g., using O.sub.2) or electrochemically.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}

Patent:

Save / Share: