摘要
通过磨损、粒径以及SEM等分析手段对催化剂微球成型的影响因素进行了考察,以便实际生产过程中更好地控制催化剂微球的球形度、磨损以及粒径。当喷雾塔的入口温度较低时,干燥速率慢,微球球形度差,粘连明显;入口温度过高,又造成干燥速率过快,裂纹现象比较明显。胶体固相质量分数、粒径对催化剂成型影响也较大,固相质量分数低时,微球球形度差,粘连比较明显;固相质量分数过高时,物料输送困难,催化剂微球会出现明显的裂纹现象;降低胶体粒径,成型微球球形度变好,粒径分布均匀;增加黏结剂的质量分数能够明显改善催化剂微球的耐磨损性能。
In order to control the product quality in manufacture process of FCC catalyst, the influencing factors of the catalyst microspheres forming were investigated by means of wear index, particle size and SEM. When the entrance temperature of the spray tower was low, the drying rate was slow, the degree of sphericity was poor, and the adhesion was obvious. When the inlet temperature was too high, the drying rate was too fast and the crack phenomenon was obvious. When the solid mass fraction was low, the sphericity was poor and the adhesion was obvious;when the solid mass fraction was too high, it was difficult to transport, obvious crack phenomenon of catalyst microspheres appeared;through reducing the colloid particle size, the degree became better, and the particle size distribution was uniform;Increasing the binder mass fraction significantly improved the wear resistance performance of catalyst microspheres.
作者
王涛
高明军
谭映临
石铁磐
李世鹏
WANG Tao;GAO ming-jun;TAN Ying-lin;SHI Tie-pan;LI Shi-peng(Qingdao Huicheng Environmental Protection Technology Co.,Ltd.,Qingdao 266580,China)
出处
《当代化工》
CAS
2021年第11期2563-2567,共5页
Contemporary Chemical Industry
关键词
催化裂化
催化剂
球形度
耐磨损性能
Catalytic cracking
Catalyst
Sphericity
Wear resistance performance
