Catalysts for conversion of methane to higher hydrocarbons

Patent · Fri Jan 01 04:00:00 EST 1993

OSTI ID:868626

Siriwardane, Ranjani V ^[1]

---

1. Morgantown, WV

Catalysts for converting methane to higher hydrocarbons such as ethane and ethylene in the presence of oxygen at temperatures in the range of about 700.degree. to 900.degree. C. are described. These catalysts comprise calcium oxide or gadolinium oxide respectively promoted with about 0.025-0.4 mole and about 0.1-0.7 mole sodium pyrophosphate. A preferred reaction temperature in a range of about 800.degree. to 850.degree. C. with a preferred oxygen-to-methane ratio of about 2:1 provides an essentially constant C.sub.2 hydrocarbon yield in the range of about 12 to 19 percent over a period of time greater than about 20 hours.

• Research Organization: National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5177294
• OSTI ID: 868626
• Country of Publication: United States
• Language: English

Related Subjects

/585/
025-0
1-0
12
19
20
700
800
850
900
calcium
calcium oxide
catalysts
comprise
constant
conversion
converting
converting methane
degree
described
essentially
essentially constant
ethane
ethylene
gadolinium
gadolinium oxide
hours
hydrocarbon
hydrocarbons
methane
mole
oxide
oxygen
oxygen-to-methane
percent
period
preferred
presence
promoted
provides
pyrophosphate
range
ratio
reaction
reaction temperature
respectively
sodium
temperature
temperatures
time
yield