蜜勒胺负载二氧化锰的合成及其稠油低温催化氧化性能

Synthesis of Melem-Loaded Manganese Dioxide and Low-TemperatureCatalytic Oxidation Performance of Heavy Oil

以三聚氰胺在354℃下热聚的蜜勒胺(Melem)为含有碳、氮元素的载体,以KMnO_(4)为锰源,通过水热法成功合成了MnO_(2)/Melem复合材料。采用SEM、TEM、XRD和XPS等方法进行结构表征。并以MnO_(2)/Melem为催化剂,通过调控催化剂用量、氧化剂用量对塔河稠油的催化氧化性能进行考察。结果表明:合成的β-MnO_(2)纳米颗粒成功负载于Melem表面上;通过对稠油催化反应前后的氧化油分别进行族组成分析、FT-IR、GC-MS和黏度测试,确定了催化氧化体系中催化剂用量为1.0%(质量分数),氧化剂选用过氧化氢叔丁醇(TBHP),TBHP用量为0.5%(质量分数);且催化改质后实现了稠油中轻质组分的增加,降黏率可达67.06%。

MnO_(2)/Melem composites were successfully synthesized by hydrothermal method using KMnO_(4) as a manganese source and Melem from Melamine thermally polycondensed at 354℃as a carrier containing carbon and nitrogen elements.SEM,TEM,XRD and XPS were used for structural characterization.Moreover,the catalytic oxidation performance of the Tahe heavy oil was investigated by regulating the catalyst dosage and oxidant dosage with MnO_(2)/Melem as the catalyst.The results show that the synthesizedβ-MnO_(2) nanoparticles can be successfully loaded on the surface of Melem.Through group composition analysis,FT-IR,GC-MS and viscosity test of the oxygenated oil before and after the catalytic reacion of heavy oil,it has been determined that the catalyst dosage in the catalytic oxidation system is 1.0%(mass fraction),and the oxidant is selected as tert-butyl hydroperoxide solution(TBHP)with dosage of 0.5%(mass fraction);the catalytic reforming can help achieve an increase of the light fraction in the heavy oil,with the viscosity reduction rate up to 67.06%.