Waste cooking oil (WCO) as a kind of renewable energy has yet to be fully developed and utilized. Base on the elemental composition, WCO belongs to macromolecular organic substance composed of C, H, and O, which would be cracked into reducing gas at high temperature. Using WCO as a green reductant is a meaningful attempt, and has a broad application prospect. In present, WCO was applied as a reductant for copper slag cleaning, and the WCO cracking in the presence of copper slag was studied in detail. The results showed that higher temperature was beneficial to the cracking of WCO, and iron and zinc oxide in the slag could promote cracking of WCO. The metal oxides in the slag reacted with the deposited C, leading to an increasing of CO and CO₂, which improved the gas yield of WCO cracking.

废食用油（WCO）作为一种可再生能源还有待充分开发利用。根据元素组成，WCO属于由C、H和O组成的大分子有机物，在高温下会裂化为还原性气体。使用WCO作为绿色还原剂是一次有意义的尝试，具有广阔的应用前景。目前，WCO被用作铜渣清洗的还原剂，并详细研究了WCO在铜渣存在下的开裂。结果表明，较高的温度有利于WCO的裂解，炉渣中的氧化铁和氧化锌可促进WCO的裂解。炉渣中的金属氧化物与沉积的C反应，导致CO和CO ₂的增加，从而提高了WCO裂解的产气率。