Method for producing tetrafluoromethane through plasma pyrolysis of waste polytetrafluoroethylene

A method for producing tetrafluoromethane through plasma pyrolysis of waste polytetrafluoroethylene (PTFE), comprising the following steps:

• subjecting the waste PTFE to a plasma pyrolysis reaction to obtain a pyrolysis product,
• subjecting the pyrolysis product to quenching and gas-solid separation in sequence to obtain a pyrolysis gas comprising the tetrafluoromethane;
• and
• subjecting the pyrolysis gas to adsorption and rectification to obtain the tetrafluoromethane;
• wherein, the plasma pyrolysis reaction is performed at a temperature of 2,000 K to 4,500 K;
• wherein, the plasma pyrolysis reaction is conducted in a plasma reactor;
• wherein, the plasma reactor is selected from the group consisting of a radio frequency plasma reactor, a microwave plasma reactor, and an arc plasma reactor;
• wherein, the waste PTFE is introduced into the plasma reactor through a carrier gas;
• and
• wherein, the waste PTFE is in a form of a granular material.