Sulfur-doped porous carbon derived from heavy hydrocarbons and methods for production thereof

US11746020B2 · kind B2 · utility

Assignee

• Exxon Mobil Technology and Engineering Company · US

Inventors

• Yi Du · Coopersburg, US
• Bradley D. Wooler · Allentown, US
• Stuart Smith · Lake Zurich, US
• Brenda A. Raich · Annandale, US
• Clarence Chase · Bensalem, US
• Lesheng Wang · Brookfield, US

Key dates

• Filing date: Jan 24, 2020
• Grant date: Sep 5, 2023
• Expiry date: Jul 26, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/12
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Sulfur-crosslinked olefins, particularly sulfur-crosslinked heavy hydrocarbon products having one or more sulfur-crosslinked olefin moieties, may undergo pyrolysis to form sulfur-doped porous carbon having high BET surface area values. Pyrolysis to form the sulfur-doped porous carbon may be particularly efficacious in the presence of a hydroxide base. BET surface areas up to 2000 m2/g or even higher may be obtained. Such sulfur-doped porous carbon may be prepared by combining a heavy hydrocarbon product with sulfur, heating to a first temperature state to form a liquefied reaction mixture containing a sulfur-crosslinked heavy hydrocarbon, homogeneously mixing a hydroxide base with the liquefied reaction mixture, and pyrolyzing the sulfur-crosslinked heavy hydrocarbon to form sulfur-doped porous carbon.