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- Title
蒸汽裂解生产乙烯的原料优化选择与配置.
- Authors
王小强; 蔡小霞; 景媛媛; 杨淑萍
- Abstract
Objective The aim is to analyze the optimal allocation of domestic ethylene cracking feedstock, and provide relevant information and technical reference for refining and chemical enterprises. Methods After rational analysis of the investment heat of ethylene production from ethane cracking, it was pointed out that the feedstock of ethylene production from steam cracking in China was still mainly naphtha with a small amount of low-carbon hydrocarbon and low-octane oil. The important roles of naphtha separation technology and cracking evaluation test in the optimization of ethylene feedstock were described. The physical properties and cracking properties of coal-based naphtha and petroleum-based cracking feedstock were compared and analyzed. Results The hot investment of the cracking of ethane to ethylene should be cautious and rational, while actively activating naphtha resources, the by-products such as low-carbon hydrocarbons and low-octane oil products, which were suitable for ethylene cracking feedstock, should be selected and used reasonably. The mass fraction of N-alkanes in coal-based naphtha was 72.83%, and the yields of ethylene, propylene, diene and triene were 18.33%-26.27%, 5.92%-12.34%, 16.50%-21.41%, 12.66%-17.53% higher than those of petroleum-based naphtha, respectively. The ethylene yield of coal-based naphtha was 10.95% and 10.74% higher than that of topped oil and light hydrocarbon of oil field, respectively. The yield of diene was 4.28% and 4.09% higher than that of topped oil and light hydrocarbon of oil field respectively. The yield of triene was 6.89% higher than that of topped oil and 6.22% higher than that of light hydrocarbon. Conclusions Based on the actual domestic energy structure of rich coal, poor oil and lack gas, the superiority of refining and chemical integration to be brought into full play, and the cracking feedstock of petroleum-based ethylene to be brought into active play, taking coal-based naphtha as a breakthrough to develop new sources of cracking feedstock was an effective way to solve the problem of shortage of domestic ethylene cracking feedstock, to improve the quality and efficiency of refining and chemical plants, to promote the high-quality development of refining and chemical industry, and to ensure energy security and realize the sustainable development of ethylene industry.
- Subjects
NAPHTHA; ALKENES; ETHYLENE
- Publication
Chemical Engineering of Oil & Gas / Shi You Yu Tian Ran Qi Hua Gong, 2024, Vol 53, Issue 1, p47
- ISSN
1007-3426
- Publication type
Article
- DOI
10.3969/j.issn.1007-3426.2024.01.008