Integrated processes and systems for conversion of methane to multiple higher hydrocarbon products
Integrated systems are provided for the production of higher hydrocarbon compositions, for example liquid hydrocarbon compositions, from methane using an oxidative coupling of methane system to convert methane to ethylene, followed by conversion of ethylene to selectable higher hydrocarbon products. Integrated systems and processes are provided that process methane through to these higher hydrocarbon products.
1. A method of producing a plurality of hydrocarbon products, the method comprising:
using an oxidative coupling of methane (OCM) catalytic reactor to convert methane and a source of oxidant to a first product gas comprising ethylene;
introducing separate portions of the first product gas into a first catalytic ethylene conversion system and a second catalytic ethylene conversion system, wherein:
the first catalytic ethylene conversion system reacts ethylene from the first product gas with an aromatic hydrocarbon to produce an alkylated aromatic hydrocarbon product, and
the second catalytic ethylene conversion system converts ethylene from the first product gas to a higher hydrocarbon product that is different from the alkylated aromatic hydrocarbon product produced in the first catalytic ethylene conversion system.
2. The method of claim 1 , further comprising introducing an additional portion of the first product gas into a third catalytic ethylene conversion system.
3. The method of claim 2 , further comprising introducing a further additional portion of the first product gas into a fourth catalytic ethylene conversion system.
4. The method of claim 1 , wherein the OCM catalytic reactor comprises nanowire catalyst materials.
5. The method of claim 1 , wherein the first product gas comprises 0.5 mol % to 15 mol % of ethylene.
6. The method of claim 1 , wherein the first product gas comprises less than 5 mol % of ethylene.
7. The method of claim 1 , wherein the first product gas comprises less than 3 mol % of ethylene.
8. The method of claim 1 , wherein the first product gas further comprises one or more gases selected from CO 2 , CO, H 2 , H 2 O, C 2 H 6 , CH 4 and C 3+ hydrocarbons.
9. The method of claim 1 , further comprising: prior to introducing the separate portions of the first product gas into the first catalytic ethylene conversion system and the second catalytic ethylene conversion system, generating an effluent stream from the first product gas, which effluent stream has a higher concentration of ethylene than the first product gas.
10. The method of claim 1 , further comprising introducing an effluent gas from the first catalytic ethylene conversion system or the second catalytic ethylene conversion system into the OCM catalytic reactor.
11. The method of claim 1 , wherein the aromatic hydrocarbon is benzene and the alkylated aromatic hydrocarbon product comprises ethylbenzene.
12. The method of claim 1 , wherein the methane and the source of oxidant is introduced into the OCM catalytic reactor at a reactor inlet temperature of about 450° C. to 600° C. and a reactor pressure of about 15 psig to 125 psig.
13. The method of claim 1 , wherein the second catalytic ethylene conversion system converts ethylene from the first product gas to a product comprising C 4 -C 20 linear alpha olefins.
14. The method of claim 1 , wherein the second catalytic ethylene conversion system converts ethylene from the first product gas to a product comprising at least one of 1-butene, 1-hexene, 1-octene, or 1-decene.
15. The method of claim 1 , wherein the second catalytic ethylene conversion system comprises a full range ethylene oligomerization system configured for producing higher hydrocarbons in the range of C4 to C30 from the ethylene in the first product gas.
16. The method of claim 1 , wherein the second catalytic ethylene conversion system converts ethylene from the first product gas to a liquid hydrocarbon product comprising benzene, toluene, and xylene.
17. The method of claim 1 , wherein the second catalytic ethylene conversion system converts ethylene from the first product gas to a product comprising ethylene oxide.
18. The method of claim 1 , wherein the first catalytic ethylene conversion system and the second catalytic ethylene conversion system are separate from and operate in a parallel configuration with respect to one another.