Methods and systems for recovering terpene compositions from wood drying exhaust

A method for controlling emissions, comprising:

• obtaining a process exhaust stream comprising one or more VOCs, HAPs, or combinations thereof;
• flowing the process exhaust stream through a fluidized bed of sorbent having a first temperature of about 130° F. to about 220° F., the sorbent configured to capture the one or more VOCs, HAPs, or combinations thereof from the process exhaust stream at the first temperature;
• heating the sorbent having the captured one or more VOCs, HAPs, or combinations thereof at a second temperature of about 302° F. to about 450° F. to release the captured one or more VOCs, HAPs, or combinations thereof from the sorbent to provide a gaseous stream comprising the released one or more VOCs, HAPs, or combinations thereof;
• heating a side stream from the fluidized bed at a third temperature of about 1,000° F. to about 1,600° F. to thermally reactivate the sorbent;
• and
• returning the reactivated sorbent to the fluidized bed.

A method for controlling emissions, comprising:

• contacting a process exhaust stream comprising one or more VOCs, HAPs, or combinations thereof with a sorbent at a first temperature, the sorbent configured to capture the one or more VOCs, HAPs, or combinations thereof from the process exhaust stream at the first temperature;
• thermally treating the sorbent having the captured VOCs, HAPs, or combinations thereof at a second temperature, the second temperature sufficient to release the captured VOCs, HAPs, or combinations thereof from the sorbent to provide a gaseous stream comprising the released VOCs, HAPs, or combinations thereof and treated sorbent;
• thermally reactivating a portion of the treated sorbent at a third temperature sufficient to thermally reactivate the sorbent, the third temperature at least 500° C. greater than the second temperature;
• combining the treated sorbent and the reactivated sorbent;
• contacting the combined treated sorbent and the reactivated sorbent with the process exhaust stream;
• and
• collecting the released VOCs, HAPs, or combinations thereof from the gaseous stream, wherein the gaseous stream comprises at least 90% of the VOCs, HAPs, or combinations thereof from the process exhaust stream.