Volatile tivthaiv
Cov teeb meem tsis haum xeeb txhais tau hais tias thaum cov thee tau rhuab ntawm 900 ± 10degrees Celsius rau 7 feeb nyob rau hauv cov xwm txheej ntawm kev sib cais ntawm huab cua, cov organic teeb meem thiab ib feem ntawm cov minerals nyob rau hauv lub thee yuav decomposed rau hauv roj (xws li carbon monoxide, methane thiab lwm yam. combustible gases) thiab cov dej ntws tawm, tshem tawm cov dej noo hauv cov thee los ntawm cov dej ntws tawm yog qhov teeb meem tsis haum.