修饰添加物对超临界碳氢燃料裂解结焦的影响

Effects of Modified Additives on Pyrolysis and Coking of Supercritical Hydrocarbon Fuels

H使用催化剂催化裂解碳氢燃料来提高热沉具有巨大的应用潜力,但裂解结焦的问题限制了其进一步的发展,本文利用钴氧化物及表面有机化修饰的分子筛,进行管内催化裂解超临界碳氢燃料(C8,C10,C12)的研究,选取最高热沉的一组催化剂(3%Co_(3)O_(4)负载量,质量分数0.1%)进行结焦过程的分析,结果表明,温度较低的前段(300 mm前)主要是热裂解二次聚合成焦,在中段(约700 mm),随着温度的提高,催化作用开始显现,管壁的元素通过渗透作用进入到逐渐积累形成的焦炭中,在后段(700 mm后),催化剂作用逐渐减弱,管壁焦体大面积迅速脱落更新,最终完全堵塞管路。

Catalytic cracking of hydrocarbon fuels to improve the heat sink has great application potential. But the issue of coking limit its further development. Cobalt oxide and surface organic modified molecular sieve were used for the study of catalytic cracking of supercritical hydrocarbon fuel(C8, C10, C12) in the pipe, and the coking process of the catalysts with the highest heat sink(3% Co_(3)O_(4)loading amounts, mass fraction 0.1%) was analyzed. The results show that the coking in front segment of low temperature(300 mm) was mainly formed through the secondary polymerization process, the catalyst function began to lead the function in the middle segment(700 mm) with the increase of temperature and the elements in the pipe began to permeate into the accumulated coking.The catalysts began to invalid in the outlet segment and the coke in the pipe rapidly fell off in large areas and renewed immediately until the pipe was blocked by coke completely.