並列摘要
The total production of low sulfur calcinated petroleum coke reached about 29 million tons in 2016, being used as anode coke(85%)、carbon raiser(6%)、needle coke(5%) and reducing agent of rutile(4%), respectively. Due to heavier crude oil and fufillment of international marine fuel oil with 0.5 wt% sulfur content in 2020, the feedstocks to delayed coker for producing low sulfur calcinated petroleum coke were become shorted gradually . This trend resulted in making petroleum coke quality worse, with high sulfur content and high metal content. This article was intented to describe the different coke specifications for anode coke、carbon raiser、needle coke and reducing agent of rutile ; and also to elucidate the aspects related to delayed coking , including improvement of green coke、modification of feedstocks and exploration of new feedstocks.