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US 9,754,733 B2Granted
Method for plasma activation of biochar material
AssigneeSouth Dakota State University
InventorsQi Hua Fan, Mukul Kumar Dubey, Zhengrong Gu
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Abstract
A method for using plasma to activate biochar is disclosed where reactive gas(es) are excited by external power; biochar set on a sample holder is electrically biased or set at a floating potential so that charged particles of a certain type are attracted to the biochar, leading to intensive chemical reactions.
Claims14
A method for activating biochar, the method comprising:
- disposing biochar material in a vacuum chamber;
- introducing a reactive gas comprising methane into the vacuum chamber at a pressure between 0.01 and 200 Torr;
- and
- generating plasma in the vacuum chamber with an external RF power supply such that the biochar material is in contact with the plasma for a time period from about 10 seconds to about 30 minutes to form activated biochar.
1 more element
Dependencies are inferred from the claim text.