修饰添加物对超临界碳氢燃料裂解结焦的影响

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% Co₃O₄ 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.