Alkene generation using metal sulfide particles

Patent metadata

Field	Value
Publication number	US-2022089511-A1
Application number	US-202017602889-A
Country	US
Kind code	A1
Filing date	Apr 8, 2020
Priority date	Apr 9, 2019
Publication date	Mar 24, 2022
Grant date	—

Abstract

Systems and methods include providing a gaseous alkane input stream and metal sulfide (MSx) particles that can react with an alkane in the gaseous alkane input stream to generate an alkene, a reduced metal sulfide (MSx-1) particle, and at least one of: hydrogen sulfide (H2S) and at least one sulfur containing compound selected from: S2, CS, and CS2. A product stream can be collected that includes the alkene and at least one of: hydrogen sulfide (H2S) and the at least one sulfur containing compound. A reduced metal sulfide (MSx-1) particle reacts with sulfur in a sulfur stream and can generate the metal sulfide (MSx) particle and hydrogen (H2).

First claim

1 . A method, comprising:
providing a gaseous alkane input stream to a first reactor; providing a metal sulfide (MS x ) particle to the first reactor,
whereupon the metal sulfide (MS x ) particle reacts with an alkane in the gaseous alkane input stream to generate an alkene, a reduced metal sulfide (MS x−1 ) particle, and at least one of: hydrogen sulfide (H 2 S) and a sulfur containing compound;
collecting a product stream from the first reactor including the alkene, hydrogen sulfide (H 2 S) and the sulfur containing compound; providing the reduced metal sulfide (MS x-1 ) particle to a second reactor; providing a sulfur stream to the second reactor,
whereupon the reduced metal sulfide (MS x-1 ) particle reacts with sulfur in the sulfur stream to generate the metal sulfide (MS x ) particle and hydrogen (H 2 ); and
collecting a second reactor output stream including hydrogen (H 2 ).

2 . The method according to claim 1 , wherein the alkane in the gaseous alkane input stream includes at least one C 2 -C 6 alkane; and
wherein the sulfur containing compound is one or more of: S 2 , CS, and CS 2 .

3 . The method according to claim 1 , further comprising:
monitoring alkane content in the product stream; and if the alkane content differs from a predetermined target, adjusting a flow rate of the gaseous alkane input stream.

4 . The method according to claim 1 , wherein the sulfur stream includes hydrogen sulfide (H 2 S).

5 . The method according to claim 4 , wherein the second reactor output stream further comprises hydrogen sulfide (H 2 S), the method further comprising:
separating the hydrogen sulfide (H 2 S) from the second reactor output stream; and recycling the separated hydrogen sulfide (H 2 S) to the second reactor.

6 . (canceled)

7 . (canceled)

8 . (canceled)

9 . (canceled)

10 . (canceled)

11 . (canceled)

12 . (canceled)

13 . (canceled)

14 . (canceled)

15 . A method, comprising:
providing a gaseous alkane input stream to a reactor, the reactor including a metal sulfide (MS x ) particle,
whereupon the metal sulfide (MS x ) particle reacts with an alkane in the gaseous alkane input stream to generate an alkene, a reduced metal sulfide (MS x-1 ) particle, and at least one of: hydrogen sulfide (H 2 S) and at least one sulfur containing compound, the at least one sulfur containing compound being selected from: S 2 , CS, and CS 2 ;
collecting a product stream from the reactor including the alkene and at least one of hydrogen sulfide (H 2 S) and the at least one sulfur containing compound; after collecting the product stream, providing an inert gas stream to the reactor; after providing the inert gas stream to the reactor, providing a sulfur stream to the reactor,
whereupon the reduced metal sulfide (MS x-1 ) particle reacts with sulfur in the sulfur stream to generate the metal sulfide (MS x ) particle and hydrogen (H 2 ); and
collecting a reactor output stream including hydrogen (H 2 ).

16 . The method according to claim 15 , further comprising:
after collecting the reactor output stream, providing the inert gas stream to the reactor, wherein the alkane in the gaseous alkane input stream includes at least one C 2 -C 6 alkane; and wherein the sulfur stream includes hydrogen sulfide (H 2 S).

17 . The method according to claim 15 or 16 , wherein the sulfur stream includes at least one allotrope of sulfur (S); and
wherein the reactor output stream includes hydrogen sulfide (H 2 S), the method further comprising:
separating the hydrogen sulfide (H 2 S) from the reactor output stream; and
recycling the separated hydrogen sulfide (H 2 S) to the reactor.

18 . (canceled)

19 . (canceled)

20 . (canceled)

Assignees

• Ohio State Innovation Foundation

Inventors

• Fan Liang-Shih
• Baser Deven
• Nadgouda Sourabh
• Joshi Anuj
• Mohapatra Pinak

Classifications

• C07C5/46 Primary

  with sulfur or a sulfur-containing compound as an acceptor · CPC title

• C07C2527/043

  with iron group metals or platinum group metals · CPC title

• C07C5/48

  with oxygen as an acceptor · CPC title

• C07C2527/04

  Sulfides · CPC title

• Y02P20/52

  using catalysts, e.g. selective catalysts · CPC title