Process for producing single wall nanotubes using unsupported metal catalysts
First Claim
1. A method for producing hollow, single-walled carbon nanotubes by catalytic decomposition of one or more gaseous carbon compounds comprising the steps of:
- (1) forming a gas phase mixture of (a) a carbon feedstock gas comprising one or more gaseous carbon compounds, each said compound having one to six carbon atoms and only H, O, N, S or Cl as hetero atoms, optionally admixed with hydrogen, wherein 50% or more of said carbon feedstock gas is carbon monoxide; and
(b) a gas phase metal containing compound which is unstable under reaction conditions for said decomposition, and which forms a metal containing catalyst which acts as a decomposition catalyst under reaction conditions;
(2) conducting said decomposition reaction under decomposition reaction conditions and thereby producing said hollow, single-walled carbon nanotubes.
1 Assignment
0 Petitions
Accused Products
Abstract
A process for producing hollow, single-walled carbon nanotubes by catalytic decomposition of one or more gaseous carbon compounds by first forming a gas phase mixture carbon feed stock gas comprising one or more gaseous carbon compounds, each having one to six carbon atoms and only H, O, N, S or Cl as hetero atoms, optionally admixed with hydrogen, and a gas phase metal containing compound which is unstable under reaction conditions for said decomposition, and which forms a metal containing catalyst which acts as a decomposition catalyst under reaction conditions; and then conducting said decomposition reaction under decomposition reaction conditions, thereby producing said nanotubes.
266 Citations
75 Claims
-
1. A method for producing hollow, single-walled carbon nanotubes by catalytic decomposition of one or more gaseous carbon compounds comprising the steps of:
-
(1) forming a gas phase mixture of (a) a carbon feedstock gas comprising one or more gaseous carbon compounds, each said compound having one to six carbon atoms and only H, O, N, S or Cl as hetero atoms, optionally admixed with hydrogen, wherein 50% or more of said carbon feedstock gas is carbon monoxide; and
(b) a gas phase metal containing compound which is unstable under reaction conditions for said decomposition, and which forms a metal containing catalyst which acts as a decomposition catalyst under reaction conditions;
(2) conducting said decomposition reaction under decomposition reaction conditions and thereby producing said hollow, single-walled carbon nanotubes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 48, 49, 52, 68, 69, 70, 71, 72, 74, 75)
-
-
22. A method for producing hollow, single-walled carbon nanotubes having diameters less than about 3 nanometers by catalytic decomposition of one or more gaseous carbon compounds comprising the steps of:
-
(1) forming a gas phase mixture of;
(a) a carbon feed stock gas comprising one or more gaseous carbon compounds, each said compound having one to six carbon atoms and only H, O, N, S or Cl as hetero atoms, optionally admixed with hydrogen, a diluent or mixtures thereof, wherein 50% or more of said carbon feedstock gas is carbon monoxide; and
(b) a gas phase metal containing compound which is unstable under reaction conditions for said decomposition, and which forms metal containing catalysts which act as decomposition catalysts under reaction conditions; and
(2) conducting said decomposition reaction under decomposition reaction conditions and thereby producing said hollow, single-walled carbon nanotubes having diameters less than about 3 nanometers. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 50, 51, 53, 54, 64, 65)
-
-
41. A method for producing hollow, single-walled carbon nanotubes by catalytic decomposition of one or more gaseous carbon compounds comprising the steps of:
-
(1) forming a gas phase mixture of (a) a carbon feedstock gas comprising one or more gaseous carbon compounds, each said compound having one to six carbon atoms and only H, O, N, S or Cl as hetero atoms, wherein said carbon feedstock gas consists essentially of carbon monoxide; and
(b) a gas phase metal containing compound which is unstable under reaction conditions for said decomposition, and which forms a metal containing catalyst which acts as a decomposition catalyst under reaction conditions;
(2) conducting said decomposition reaction under decomposition reaction conditions and thereby producing said hollow, single-walled carbon nanotubes. - View Dependent Claims (55, 56, 57, 58, 59, 60, 61, 62, 63, 66, 67, 73)
-
-
42. A method for producing hollow, single-walled carbon nanotubes having diameters less than about 3 nanometers by catalytic decomposition of one or more gaseous carbon compounds comprising the steps of:
-
(1) forming a gas phase mixture of;
(a) a carbon feed stock gas comprising one or more gaseous carbon compounds, each said compound having one to six carbon atoms and only H, O, N, S or Cl as hetero atoms, wherein said carbon feedstock gas consists essentially of carbon monoxide; and
(b) a gas phase metal containing compound which is unstable under reaction conditions for said decomposition, and which forms metal containing catalysts which act as decomposition catalysts under reaction conditions; and
(2) conducting said decomposition reaction under decomposition reaction conditions and thereby producing said hollow, single-walled carbon nanotubes having diameters less than about 3 nanometers.
-
-
43. A method for producing hollow, single-walled carbon nanotubes having diameters less than about 3 nanometers by catalytic decomposition of one or more gaseous carbon compounds comprising the steps of:
-
(1) forming a gas phase mixture of;
(a) a carbon feed stock gas comprising one or more gaseous carbon compounds, each said compound having one to six carbon atoms and only H, O, N, S or Cl as hetero atoms; and
(b) a gas phase metal containing compound which is unstable under reaction conditions for said decomposition, and which forms metal containing catalysts which act as decomposition catalysts under reaction conditions, wherein said gas phase metal containing compound is in the form of an aerosol; and
(2) conducting said decomposition reaction under decomposition reaction conditions and thereby producing said hollow, single-walled carbon nanotubes having diameters less than about 3 nanometers.
-
-
44. A method for producing hollow, single-walled carbon nanotubes having diameters less than about 3 nanometers by catalytic decomposition of one or more gaseous carbon compounds comprising the steps of:
-
(1) forming a gas phase mixture of;
(a) a carbon feed stock gas comprising one or more gaseous carbon compounds, each said compound having one to six carbon atoms and only H, O, N, S or Cl as hetero atoms; and
(b) a gas phase metal containing compound which is unstable under reaction conditions for said decomposition, and which forms metal containing catalysts which act as decomposition catalysts under reaction conditions, wherein said gas phase metal containing compound comprises Mo(CO)6 or Co2(CO)8; and
(2) conducting said decomposition reaction under decomposition reaction conditions and thereby producing said hollow, single-walled carbon nanotubes having diameters less than about 3 nanometers.
-
-
45. A method for producing hollow, single-walled carbon nanotubes having diameters less than about 3 nanometers by catalytic decomposition of one or more gaseous carbon compounds comprising the steps of:
-
(1) forming a gas phase mixture of;
(a) a carbon feed stock gas comprising one or more gaseous carbon compounds, each said compound having one to six carbon atoms and only H, O, N, S or Cl as hetero atoms; and
(b) a gas phase metal containing compound which is unstable under reaction conditions for said decomposition, and which forms metal containing catalysts which act as decomposition catalysts under reaction conditions, wherein said gas phase metal containing compound comprises a volatile manganese compound; and
(2) conducting said decomposition reaction under decomposition reaction conditions and thereby producing said hollow, single-walled carbon nanotubes having diameters less than about 3 nanometers.
-
-
46. A method for producing hollow, single-walled carbon nanotubes having diameters less than about 3 nanometers by catalytic decomposition of one or more gaseous carbon compounds comprising the steps of:
-
(1) forming a gas phase mixture of;
(a) a carbon feed stock gas comprising one or more gaseous carbon compounds, each said compound having one to six carbon atoms and only H, O, N, S or Cl as hetero atoms; and
(b) a gas phase metal containing compound which is unstable under reaction conditions for said decomposition, and which forms metal containing catalysts which act as decomposition catalysts under reaction conditions; and
(2) conducting said decomposition reaction under decomposition reaction conditions and thereby producing said hollow, single-walled carbon nanotubes having diameters less than about 3 nanometers, wherein said method provides a yield of hollow, single-walled carbon nanotubes greater than about 20 wt %.
-
-
47. A method for producing hollow, single-walled carbon nanotubes by catalytic decomposition of one or more gaseous carbon compounds comprising the steps of:
-
(1) forming a gas phase mixture of (a) a carbon feedstock gas comprising one or more gaseous carbon compounds, each said compound having one to six carbon atoms and only H, O, N, S or Cl as hetero atoms; and
(b) a gas phase metal containing compound which is unstable under reaction conditions for said decomposition, and which forms a metal containing catalyst which acts as a decomposition catalyst under reaction conditions;
(2) conducting said decomposition reaction under decomposition reaction conditions and thereby producing said hollow, single-walled carbon nanotubes, wherein said method provides a yield of hollow, single-walled carbon nanotubes greater than about 20 wt %.
-
Specification