Alkene generation using metal sulfide particles

Patent metadata

Field	Value
Publication number	US-11767275-B2
Application number	US-202217952748-A
Country	US
Kind code	B2
Filing date	Sep 26, 2022
Priority date	Apr 9, 2019
Publication date	Sep 26, 2023
Grant date	Sep 26, 2023

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

We claim:

1. A system, comprising:
an alkane source;
a first reactor comprising:
an alkane inlet in fluid communication with the alkane source;
an oxidized particle inlet configured to receive a metal sulfide (MS x ) particle;
a reduced particle outlet configured to discharge a reduced metal sulfide (MS x-1 ) particle; and
a first reactor product outlet configured to provide an alkene and hydrogen sulfide (H 2 S);

a sulfur source;
a second reactor comprising:
a sulfur inlet in fluid communication with the sulfur source;
a reduced particle inlet in fluid communication with the reduced particle outlet of the first reactor;
an oxidized particle outlet in fluid communication with the oxidized particle inlet of the first reactor; and
a second reactor product outlet configured to provide hydrogen (H 2 ); and

a separation unit in fluid communication with the first reactor product outlet, the separation unit comprising:
a hydrogen sulfide (H 2 S) outlet in fluid communication with the sulfur inlet of the second reactor; and
an alkene outlet configured to provide an alkene stream.

2. The system according to claim 1 , wherein the second reactor product outlet is configured to provide hydrogen sulfide (H 2 S); and
further comprising a second separation unit in fluid communication with the second reactor product outlet, the second separation unit comprising:
a hydrogen sulfide (H 2 S) outlet in fluid communication with the sulfur inlet of the second reactor; and
a hydrogen (H 2 ) outlet.

3. The system according to claim 1 , wherein the first reactor is configured as a moving bed.

4. The system according to claim 1 , wherein the second reactor is configured as a moving bed.

5. The system according to claim 1 , wherein the first reactor is configured as a fluidized bed.

6. The system according to claim 1 , wherein the second reactor is configured as a fluidized bed.

7. The system according to claim 1 , wherein a metal (M) in the metal sulfide (MS x ) particle includes iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), tungsten (W), lanthanum (La), cerium (Ce), titanium (Ti), zinc (Zn), cadmium (Cd), ruthenium (Ru), rhodium (Rh) or lead (Pb).

8. The system according to claim 7 , wherein the metal sulfide (MS x ) particle comprises at least two metals.

9. The system according to claim 7 , wherein the metal sulfide (MS x ) particle has a size of 100 μm to 2 mm; and
wherein the metal sulfide (MS x ) particle has density of 1.5 g/cm 3 to 6 g/cm 3 .

10. The system according to claim 1 , further comprising a monitoring unit in fluid communication with the first reactor product outlet, the monitoring unit being configured to:
determine a conversion rate of alkanes in the first reactor; and
adjust a flow rate from the alkane source based on the determined conversion rate.

11. The system according to claim 10 , wherein the sulfur source is configured to adjust a flow rate of sulfur to the second reactor based on conversion data for the second reactor product outlet.

12. The system according to claim 1 , wherein the metal sulfide (MS x ) particle includes a promotor, dopant, or support selected from: MoS 2 , Ce 2 S 3 , MgS, Na 2 S, K 2 O, MgO, SiO 2 , Al 2 O 3 , and MgAl 2 O 4 .

13. The system according to claim 1 , wherein the metal sulfide (MS x ) particle includes a mesoporous support selected from: Santa Barbara Amorphous-15 silica (SBA-15), Santa Barbara Amorphous-16 silica (SBA-16), Mesoporous Al 2 O 3 , and Mesoporous CeO 2 .

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

• C07C5/48

  with oxygen as an acceptor · CPC title

• C07C2527/043

  with iron group metals or platinum group metals · CPC title

• C07C2527/04

  Sulfides · CPC title

• Y02E60/36

  Hydrogen production from non-carbon containing sources, e.g. by water electrolysis · CPC title