The olefins, such as ethylene and propylene, are formed from petroleum gas or from cracking of larger hydrocarbons. Ethylene is used to make polyethylene e.g.
烯烃主要是来自石油气或大分子的碳氢化合物裂解，如乙烯，丙烯。
2
The scale blocking reasons of steam turbine of crackinggas compressor set for ethylene unit are analyzed, some protections of scale blocking for steam turbine are put forward.
对乙烯装置裂解气压缩机组中的汽轮机发生垢堵的原因进行了分析，并提出了一些预防汽轮机垢堵的措施。
3
The gas phase oxidative cracking (GOC) processes of decalin and cyclohexane were investigated by using the quartz tube reactor at atmospheric pressure.