摘要
对扩孔剂法提高原位晶化微球的NaY分子筛含量进行了研究。以海南椰壳粉为原料制备扩孔剂EPA-C,将1%～7%EPA-C加入高岭土浆液后进行喷雾造粒,得到粒度分布为20～150μm的喷雾微球,喷雾微球经750～950℃焙烧2h得到焙烧微球,焙烧微球经水热晶化得到含59%～66%NaY分子筛的晶化微球,而不加EPA-C的样品只有38%NaY分子筛;实验结果表明:焙烧微球比表面积和孔体积增大,则晶化微球的NaY含量提高;在喷雾微球中引入EPA-C可以增加焙烧微球的比表面积和孔体积,引入1%的EPA-C,焙烧微球的BET比表面积由8.8m2/g提高到13.3m2/g,孔体积由2.0mL/g提高到3.1mL/g;同时晶化微球的抗磨性能较好,磨损指数小于2.1%/h,符合商用FCC催化剂的要求。
This paper investigated the pore creating method to increase the NaY content in the in situ crystallized microspheres. The pore creating agent EPA-C was prepared from the coconut shell. The spaying method was used to produce microspherical morphology upon addition of EPA-C （1%-7%） in the kaolin gel. As made microspheres have a size in range of 20-150μm. The calcined microspheres were obtained after calcination at 750-950 ℃ for 2 hours. The calcined microspheres were hydrothermally crystallized to produce crystallized microspheres which has a content of 59%-66% NaY zeolite, but only 38% for that without addition of EPA- C. Meanwhile, the experiments revealed the NaY content increased with the specific surface area and the pore volume of the calcined microspheres. Introduction of EPA-C during the spaying can effectively increase the specific surface area and the pore volume of the calcined microspheres. When 1% EPA-C was added in the spaying process, the BET specific surface area was 13.3m^2/g, compared to 8.8m^2/g for that without addition of EPA-C. Also, the pore volume was increased to 3.1 from 2.0mL/g. Interestingly, it is found that the crystallized microsheres have a good attrition resistant properties, and the attrition index is less than 2.1%/h, meeting the request of the FCC catalyst.
出处
《中国非金属矿工业导刊》
2009年第2期33-36,共4页
China Non-Metallic Minerals industry
基金
海南省重点科技发展项目(05502-2005)
海南省自然科学基金项目(80603-2006)
关键词
扩孔剂法
原位晶化微球
NAY分子筛
pore creating method
in-situ crystallized microspheres
NaY zeolite
