Hydrocarbon conversion processes using metal carbide nanomaterial catalysts

Patent metadata

Field	Value
Publication number	US-2020246783-A1
Application number	US-202016744371-A
Country	US
Kind code	A1
Filing date	Jan 16, 2020
Priority date	Feb 4, 2019
Publication date	Aug 6, 2020
Grant date	—

Abstract

A catalyst that includes heterogeneous metal carbide nanomaterials and a novel preparation method to synthesize the metal carbide nanomaterials under relatively mild conditions to form an encapsulated transition metal and/or transition metal carbide nanoclusters in a support and/or binder. The catalyst may include confined platinum carbide nanoclusters. The preparation may include the treatment of encapsulated platinum nanoclusters with ethane at elevated temperatures. The catalysts may be used for catalytic hydrocarbon conversions, which include but are not limited to, ethane aromatization, and for selective hydrogenation, with negligible green oil production.

First claim

1 . A catalytic process using metal carbide nanomaterials comprising the steps of:
preparing a metal carbide nanomaterial comprising a support and a plurality of metal carbide nanoclusters encapsulated in a plurality of micropores of the support, performing a catalytic hydrocarbon conversion process using the metal carbide nanomaterial.

2 . The catalytic process according to claim 1 , wherein the support is selected from, but not limited to, inorganic oxides, silicon carbide, silicon nitride, boron nitride, carbon, and combinations thereof, preferably an aluminosilicate zeolite, more preferably ZSM-5.

3 . The catalytic process according to claim 1 , wherein the metal is a transition metal, preferably platinum.

4 . The catalytic process according to claim 1 , wherein the catalyst contains between 300-25000 ppm of platinum, and most preferably 500 ppm platinum.

5 . The catalytic process according to claim 4 , wherein the encapsulated platinum carbide nanoclusters have a size close to 1 nm.

6 . The catalytic process according to claim 4 , wherein the catalyst has a platinum dispersion greater than 90%.

7 . The catalytic process according to claim 1 , wherein the hydrocarbon conversion process includes but is not limted to catalytic conversion of ethane to aromatics and catalytic hydrogenation of alkynes and alkadienes to olefins.

8 . The catalytic process according to claim 6 , wherein the encapsulated platinum carbide nanoclusters are active and selective towards ethane aromatization.

9 . The catalytic process according to claim 8 , wherein the ethane aromatization is perfomed at temperatures between 300-750° C., preferably between 500-650° C., more preferably between 600-630° C.

10 . The catalytic process according to claim 8 , wherein the ethane aromatization is perfomed at gas hourly space velocity (GHSV) of ethane between 500-5000 hr −1 , preferably at GHSV of ethane at 1000 hr −1 .

11 . The catalytic process according to claim 7 , wherein the catalytic hydrocarbon conversion process includes but is not limited to selective hydrogenating of acetylene to ethylene.

12 . The catalytic process according to claim 11 , wherein the encapsulated metal carbide nanoclusters are platinum carbide nanoclusters that are active towards selective hydrogenating of acetylene to ethylene, with negligible green oil productivity.

13 . The catalytic processes according to claim 11 , wherein selective hydrogenating of acetylene to ethylene is performed at temperatures between 20-200° C., preferably between 20-90° C.

14 . The catalytic processes according to claim 11 , wherein selective hydrogenating of acetylene to ethylene is performed at GHSV of acetylene between 10-1000 hr −1 , and a H 2 /C 2 H 2 ratio between 0.5 to 20, preferably between 2-6.

Assignees

• China Energy Investment Corp Ltd
• Nat Institute Of Clean-And-Low-Carbon Energy

Inventors

• Shan Junjun
• Wang Hui
• Nguyen Lisa
• Miles Joshua
• Cheng Jihong

Classifications

• B01J2235/00

  Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties · CPC title

• B01J35/393

  Metal or metal oxide crystallite size · CPC title

• B01J35/45

  Nanoparticles · CPC title

• B01J2235/10

  Infrared [IR] · CPC title

• Y02P20/52

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