Integrated gas turbine and conversion system process

Patent metadata

Field	Value
Publication number	US-9926242-B2
Application number	US-201615288403-A
Country	US
Kind code	B2
Filing date	Oct 7, 2016
Priority date	Nov 4, 2015
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

Disclosed is an integrated process and system to generate power and convert acyclic C5 feedstock to non-aromatic, cyclic C5 hydrocarbon. A combustion device, such as a turbine, and reactor tubes containing catalyst compound are disclosed. A process involving contacting acyclic C5 feedstock with catalyst composition and obtaining cyclic C5 hydrocarbon is also disclosed.

First claim

What is claimed is:

1. A process for converting acyclic C5 hydrocarbon to cyclic C5 hydrocarbon, wherein the process comprises:
a) compressing a gas stream comprising oxygen;
b) oxidizing fuel with the compressed gas stream to produce a hot gas stream;
c) providing a feedstock comprising acyclic C5 hydrocarbon;
d) contacting the feedstock with a catalyst composition in parallel reactor tubes while transferring heat by convection from the hot gas stream to the outer surface of the reactor tube walls, wherein the catalyst composition comprises platinum on ZSM-5, platinum on zeolite L, and/or platinum on silicate modified silica;
e) obtaining a reactor effluent comprising cyclic C5 hydrocarbon, wherein the cyclic C5 hydrocarbon comprises cyclopentadiene;
f) discontinuing providing a feedstock comprising acyclic C5 hydrocarbons and reducing the amount of heat transferred by convection from the hot gas stream;
g) providing a rejuvenation gas comprising H 2 ;
h) contacting the rejuvenation gas with the catalyst composition to remove at least a portion of coke material on the catalyst composition; and
i) discontinuing providing a rejuvenation gas and resuming providing a feedstock comprising acyclic C5 hydrocarbons and increasing the amount of heat transferred by convection from the hot gas stream.

2. The process of claim 1 , wherein the reactor tubes have an inverse temperature profile or an isothermal temperature profile.

3. The process of claim 1 , wherein the feedstock and the hot gas stream flow in the same direction providing a heat flux near the inlet that is greater than the heat flux near the outlet of the reactor tubes.

4. The process of claim 1 , further comprising burning additional fuel with unreacted oxygen in the hot gas stream to increase the temperature of the hot gas stream prior to said transferring heat by convection in step d).

5. The process of claim 1 , wherein the contacting feedstock and catalyst composition is performed in the presence of H 2 , C 1 , C 2 , C 3 , and/or C 4 hydrocarbons.

6. The process of claim 1 , further comprising promoting heat transfer to the catalyst composition by providing fins or contours on the inside and/or outside of the reactor tubes.

7. The process of claim 6 , wherein the fins and/or the contours promote a heat flux near the inlet that is greater than the heat flux at the reactor tube outlet.

8. The process of claim 1 , further comprising mixing feedstock and converted cyclic C5 hydrocarbon in the radial direction by providing mixing internals within the reactor tubes, wherein the mixing internals are positioned i) within a bed of the catalyst composition or ii) in portions of the reactor tube separating two or more zones of catalyst composition.

9. The process of claim 1 , wherein contacting feedstock with the catalyst composition occurs at a temperature of about 450° C. to about 800° C.

10. The process of claim 1 , wherein the reactor tubes have an outlet pressure of about 4 psia to about 50 psia during contacting feedstock with catalyst composition.

11. The process of claim 1 , wherein the reactor tubes, during contacting feedstock with catalyst composition, have a pressure drop measured from reactor inlet to reactor outlet from about 1 psi to about 100 psi.

12. The process of claim 1 , wherein the catalyst composition is an extrudate having a diameter of 2 mm to 20 mm.

13. The process of claim 1 , wherein the catalyst composition cross section is shaped with one or more lobes and/or concave sections, and wherein the catalyst composition lobes and/or concave sections are spiraled or straight.

14. The process of claim 1 , wherein the inside diameter of the reactor tubes is from about 20 mm to about 200 mm.

15. The process of claim 1 , further comprising transferring an additional amount of heat by convection from the hot gas stream to rejuvenation gas, regeneration gas, the feedstock, the fuel, the gas stream comprising oxygen, and/or steam.

16. The process of claim 1 , further comprising i) providing two or more pluralities of parallel reactor tube(s), the reactor tubes containing catalyst composition and ii) providing a rejuvenation gas or a regeneration gas to one or more reactor tube pluralities and providing feedstock comprising acyclic C5 hydrocarbons to a different one or more reactor tube pluralities.

17. The process of claim 1 further comprising:
a) discontinuing providing a feedstock comprising acyclic C5 hydrocarbons and reducing the amount of heat transferred by convection from the hot gas stream;
b) purging any combustible gas, including feedstock and reactor product, from the reactor tubes;
c) contacting a regeneration gas comprising an oxidizing material with the catalyst composition to remove by oxidation at least a portion of coke material on the catalyst composition;
d) purging regeneration gas from the reactor tubes; and
e) discontinuing purging with regeneration gas and resuming providing a feedstock comprising acyclic C5 hydrocarbons and increasing the amount of heat transferred by convection from the hot gas stream.

18. The process of claim 1 , wherein the catalyst composition is formed into a structured catalyst shape.

19. The process of claim 1 , further comprising providing the feedstock to at least one adiabatic reaction zone prior to the contacting of d).

20. The process of claim 1 , wherein the oxidizing of b) is performed in a turbine, fuel cell, furnace, boiler, excess air burner, and/or fluidized bed, and wherein said fuel is selected from the group consisting of coal, fuel oil, hydrogen, methane, and mixtures thereof.

21. An integrated process for generating power and converting acyclic C5 hydrocarbon to cyclic C5 hydrocarbon, wherein the process comprises:
a) compressing a gas stream comprising oxygen;
b) burning fuel gas with the compressed gas stream in a turbine to produce turbine power and a turbine exhaust stream;
c) providing a feedstock comprising acyclic C5 hydrocarbon;
d) contacting the feedstock with a catalyst composition in parallel reactor tubes while transferring heat by convection from the turbine exhaust stream to the outer surface of the reactor tube wall, wherein the catalyst composition comprises platinum on ZSM-5, platinum on zeolite L, and/or platinum on silicate modified silica;
e) obtaining a reactor effluent comprising cyclic C5 hydrocarbon, wherein the cyclic C5 hydrocarbon comprises cyclopentadiene;
f) discontinuing providing a feedstock comprising acyclic C5 hydrocarbons and reducing the amount of heat transferred by convection from the turbine exhaust stream;
g) providing a rejuvenation gas comprising H 2 ;
h) contacting the rejuvenation gas with the catalyst composition to remove at least a portion of coke material on the catalyst composition; and
i) discontinuing providing a rejuvenation gas and resuming providing a feedstock comprising acyclic C5 hydrocarbons and increasing the amount of heat transferred by convection from the turbine exhaust stream.

Assignees

• Exxonmobil Chemical Patents Inc

Inventors

• Iaccino Larry L
• Lemoine Romain O V

Classifications

• B01J8/062

  being installed in a furnace · CPC title

• C07C5/373 Primary

  with simultaneous isomerisation · CPC title

• B01J8/02

  with stationary particles, e.g. in fixed beds · CPC title

• C07C13/15

  with a cyclopentadiene ring · CPC title

• C07C2601/10

  the ring being unsaturated · CPC title