摘要
用茂名高岭土制备出60μm左右的高岭土微球,并研究了微球的热相变,结果表明,在650～850℃焙烧时,高岭石全部转晶为氧化硅和氧化铝无定形体,950℃以上焙烧时,则开始向莫来石转晶;采用850℃焙烧微球CM可晶化出NaY分子筛含量为40%、NaY硅铝比为4.6的CRM载体;采用CRM载体制备的La0.7Sr0.3Mn0.8Co0..2O3/CRM催化剂,经30min的催化反应,均能将废水的COD从500 ppm降至47 ppm以下,具有高效去除废水COD作用。
The kaolin microspheres were prepared from Maoming kaolin by spraying method. The spraying microspheres（SM） were calcined at defferent temperature for investigating their phase transition. Within calcining temperature 650-850 ℃, the kaolinite crystal in the SM transformed to amorphous silica and alumina, and above the 950 ℃ the crystal transformed to mullite. Employing the calcined microspheres（CM） as maternal microspheres which were obtained by calcining the SM at 850℃, the crystallized microspheres（CRM） containing 40 % zeoite NaY （the SIO2/A1203 ratio of NaY was 4.6） were obtained by in-situ crystallization. The microspheric catalyst for treating wastewater was prepared by employing the CRM as support and the Lao.TSr0.3Mn0.sCo0.203 as acttive constituent. Using the catalyst, the COD in wastewate was reduced from 500 ppm to 47 ppm below. The catalystt was a solid catalyst for high effectively removing COD of wastewate.
出处
《广东化工》
CAS
2013年第16期9-10,3,共3页
Guangdong Chemical Industry
基金
2013年海南大学化学工程与技术重点学科项目(HG-201301)
