氧氯化条件对连续重整催化剂铂晶粒再分散的影响  

EFFECT OF OXYCHLORINATION CONDITIONS ON Pt REDISPERSION IN CONTINUOUS REFORMING CATALYST

作　　者：黄宇恺 董晨 刘彤 张新宽 Huang Yukai;Dong Chen;Liu Tong;Zhang Xinkuan(SINOPEC Research Institute of Petroleum Processing Co.,Ltd.,Beijing 100083)

机构地区：[1]中石化石油化工科学研究院有限公司,北京100083

出　　处：《石油炼制与化工》2024年第6期52-60,共9页Petroleum Processing and Petrochemicals

基　　金：中国石油化工股份有限公司技术开发项目(121037-1、122031)。

摘　　要：利用固定床反应装置,系统考察了氧氯化条件对连续重整催化剂中Pt晶粒再分散规律的影响。结果表明:提高氧氯化温度和降低水氯分子比有利于促进Pt晶粒再分散,提高催化剂的金属分散度;同时,金属分散度的改善效果还与Pt晶粒初始粒径有关,当Pt晶粒粒径大于100 nm时,金属分散度很难改善。基于上述规律,对某工业装置的氧氯化条件进行了优化,优化9个月后催化剂的金属分散度从0.46恢复至0.81,外观呈均匀白色,催化性能显著提高,芳烃产率提高2.3百分点。The effects of oxychlorination conditions on redispersion of Pt grains in continuous reforming catalyst were investigated in a fixed bed reactor.The results indicated that increasing the temperature of oxychlorination and decreasing the molecular ratio of water to chlorine were beneficial to the redispersion of Pt grains and the metal dispersion of the catalyst.The improvement of metal dispersion was also related to the initial particle size of Pt grains.When the initial particle size of Pt grains was above 100 nm,it was difficult to increase the metal dispersion.Based on the above-mentioned laws,the oxychlorination conditions in an industrial plant were optimized.After 9 months of optimization,the metal dispersion of the catalyst recovered from 0.46 to 0.81 and its appearance was uniform white.The catalytic performance was recovered and the yield of aromatic increased by 2.3 percentage points.

关 键 词：氧氯化 金属分散度 铂晶粒 再分散 连续重整 

分 类 号：TE624.92[石油与天然气工程—油气加工工程]