Abstract:

The combination of global "overcapacity" and high feedstock costs is the major challenge facing petrochemical industry in China. Reasonable feedstock substitution is an important way to assist petrochemical industry turn losses into profits in China. Herein, three suggestions on feedstock substitution were proposed. Firstly, olefin and alkane mixtures were used as ethylene feedstock by adopting polymerization- separation technologies, which can significantly reduce the feedstock cost of ethylene industry, solve the problem of insufficient ethylene feedstock and create a new polymer industry since there were enough low-cost mixtures of olefin and alkane in China. Secondly, carbon dioxide, waste polymers and non-food biomass such as straw and branches were used as feedstock to produce existing petrochemical products, which was possible to help petrochemical industry of China to achieve low-cost green development. The third was to learn from petrobras, coupling biochemical industry with petrochemical industry. In this way, petrochemical plants can produce both petroleum-based products and high-value-added bio-based products.

Key words: petrochemical, feedstock substitution, carbon dioxide, non-food biomass, waste polymer

摘要：

全球“产能过剩”和我国原料成本高叠加是我国石油化工产业面临的最大挑战，合理的原料替代是助力我国石化产业高质量发展的重要手段。本文提出三个原料替代方面的建议：一是采用聚合分离新技术，将我国数千万吨低成本未资源化利用的烯烃和烷烃混合物用于乙烯原料，解决我国石化工业乙烯原料不足的问题，并大幅度降低乙烯装置的原料成本，还可创造一个新的大宗聚合物产业；二是以二氧化碳、秸秆和树枝等非粮生物质、废弃聚合物为原料生产现有石化产品使我国石化产业实现低成本绿色发展；三是借鉴巴西石油经验，将生物化工与石油化工耦合，使石化装置即可生产石油基产品，也可生产高附加值的生物基产品。

关键词: 石油化工, 原料替代, 二氧化碳, 非粮生物质, 废弃聚合物