Imithombo ye-coal gesi enokutsha i-carbon monoxide kunye ne-hydrogen, eyokugqibela iwela phantsi kodidi lwerhasi eqhumayo yoHlelo lwe-IIC. Ukwahluka kwirhasi yendalo, apho IIBT4 izixhobo zombane ezingaqhushumbayo zanele, Irhasi yamalahle yenza kube yimfuneko ukusetyenziswa kwe-IICT4.
Ukufumana isiqinisekiso sokhuseleko esongezelelweyo, Ukuqhutywa kovavanyo lokuqhutywa kwesithuba okanye ubuncinci bokuhlobisa.