甲基萘烷基化催化剂积炭的烧炭研究

2，6-二甲基萘(2，6-DMN)是生产新型的高性能聚酯材料-聚萘二甲酸乙二醇酯(PEN)的原料。PEN具有优越的耐热性能、机械性能、化学稳定性、阻气性和耐紫外线及辐射性能，应用前景非常广阔。随着PEN的发展，对2，6-DMN的需求将不断增加。

STUDY ON BURNING OF COKE DEPOSITED ON THE CATALYST FOR ALKYLATION OF METHYLNAPHTHALENE AND METHANOL BY THERMO-GRAVIMETRY

The alkylation of methylnaphthalene and methanol was carried out on HZSM-5 zeolite catalyst. The characteristics of coke deposited on the catalysts under the atmospheric pressure or supercritical fluid condition were found out and coke-burning reaction apparent activation energies of the used catalysts were calculated by using the thermo gravimetric analysis technique. The results showed that compared to the catalyst used at the atmospheric pressure, coke deposition was greatly depressed and life of catalysts increased 10 times under the supercritical fluid reaction condition. The coke-burning reaction of the used catalysts mainly happened at temperature range of 420 ℃ to 580 ℃. The longer reaction time led to higher peak temperature of weight loss and to greater coke-burning reaction apparent activationenergies of the used catalysts.