环烷酸在酸性催化剂上的催化转化研究

STUDY ON THE CATALYTIC CONVERSION OF NAPHTHENIC ACID OVER ACIDIC CATALYST

在重油微反装置上进行了环烷酸在酸性催化剂上的催化转化研究,考察了反应温度、催化剂装填量以及掺混直馏柴油对环烷酸转化率和脱酸效果的影响,并与环烷酸的热转化反应进行了比较。结果表明,环烷酸在酸性催化剂上的催化脱酸反应很容易进行,在较低的反应温度下(400℃)脱酸率接近100%;而相同条件下的热脱酸效果较差。反应温度和催化剂装填量的改变不影响环烷酸的脱酸率,但是会影响转化率与产物分布,其影响规律与常规催化裂化相似。环烷酸的脱酸反应生成CO和CO_2,但以CO为主。直馏柴油的加入并不影响环烷酸的催化脱酸效果。

Study on the catalytic conversion of naphthenic acid over acidic catalyst was carried out on a micro-activity test unit. The effects of reaction temperature, catalyst loading amount and adding straight run diesel oil on the conversion and acid removal rate of naphthenic acid were investigated, and the results were compared with the thermal conversion. It was showed that naphthenic acid was easy to be converted over acidic catalyst. The influence of reaction temperature on the thermal deacidification was significant, but with much lesse influence on the catalytic deacidification, at 400 ℃, the catalytic deacidification rate was almost 1000. Changes of reaction temperature and catalyst amount seemed have a little influence on the catalytic deacidification rate, but the conversion and product distributions were affected, which was similar to the conventional catalytic cracking. CO and CO2 were formed during the deacidification of naphthenic acid and mainly CO. Blending straight run diesel oil had little influence on the catalytic deacidification of naphthenic acid, which indicated that naphthenic acid in crude oil should be converted quite easily.