Petroleum Refinery Engineering ›› 2025, Vol. 55 ›› Issue (5): 1-4.

• PROCESSING •     Next Articles

Research on the Process of Preparing Low-sulfur Petroleum Coke from Ethylene Tar and Catalytic Cracking Slurry

Liu Hui   

  1. Sinopec Fourth Construction Co., Ltd., Tianjin 300270, China
  • Online:2025-05-15 Published:2025-05-22

乙烯焦油与催化裂化油浆制备低硫石油焦工艺研究

刘辉   

  1. 中石化第四建设有限公司，天津市 300270
  • 作者简介:刘辉，高级工程师，主要从事项目管理、采购、施工管理工作。联系电话：022-63863166，E-mail: liuhui.ssj@ sinopec.com。

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Abstract:

In order to study the process of producing high-quality low-sulfur petroleum coke from ethylene tar and catalytic cracking slurry, the effects of different reaction conditions on petroleum coke were investigated using a delayed coking pilot plant with ethylene tar and catalytic cracking slurry as raw materials. The results show that under the optimal pre-treatment conditions of a temperature of 350℃, a pressure of 0.6MPa, and a reaction time of 120min, the petroleum coke yield of ethylene tar reaches 28.70%. Compared with the petroleum coke obtained without pre-treatment, the yield of petroleum coke is increased by 2.34 percentage points. The addition of catalytic cracking slurry has a significant impact on the yield and ash content of petroleum coke, and the appropriate blending ratio is 20%–30%. The yield of low-sulfur petroleum coke prepared from ethylene tar and catalytic cracking slurry can reach 36.96%, which is 10.60 percentage points higher than that of pure ethylene tar. Moreover, the ash content of the petroleum coke is less than 0.4%, the volatile matter is less than 12%, and the sulfur mass fraction is less than 0.5%, meeting the technical requirements of 2A coke.

Key words: ethylene tar, catalytic cracking slurry, two-stage coking, pre-treatment time, pre-treatment pressure, petroleum coke yield, low-sulfur petroleum coke

摘要： 为研究乙烯焦油和催化裂化油浆生产高品质低硫石油焦的工艺方案，以乙烯焦油和催化裂化油浆为原料，通过延迟焦化小试装置研究了不同反应条件对石油焦的影响。结果表明：在温度为350℃、压力为0.6MPa、反应时间为120min等最佳的预处理条件下，乙烯焦油石油焦收率为28.70%；与未预处理得到的石油焦相比，石油焦收率提高2.34百分点；催化裂化油浆对石油焦收率和石油焦的灰分影响较大，适宜的掺入比例为20%～30%；乙烯焦油和催化裂化油浆制备的低硫石油焦收率可达36.96%，比纯乙烯焦油高出10.60百分点，并且所得石油焦灰分低于0.4%，挥发分小于12%，硫质量分数小于0.5%，可满足2A焦的技术指标要求。

关键词: 乙烯焦油, 催化裂化油浆, 两段焦化, 预处理时间, 预处理压力, 石油焦收率, 低硫石油焦