研究了无有机胺醇水体系低硅铝比ZSM-5沸石的绿色合成方法。在无有机胺模板剂和不加晶种的醇水体系中,一步合成了形貌均一的小晶粒聚集体低硅铝比ZSM-5沸石,考察了合成体系中各配料的含量以及晶化温度对合成低硅铝比ZSM-5沸石的影响。利...研究了无有机胺醇水体系低硅铝比ZSM-5沸石的绿色合成方法。在无有机胺模板剂和不加晶种的醇水体系中,一步合成了形貌均一的小晶粒聚集体低硅铝比ZSM-5沸石,考察了合成体系中各配料的含量以及晶化温度对合成低硅铝比ZSM-5沸石的影响。利用XRD、FTIR、SEM、N_(2)吸附-脱附、^(27)Al MAS NMR和^(29)Si MAS NMR等方法对合成的ZSM-5沸石进行表征。实验结果表明,当n(Si)∶n(Al)=20,n(Na_(2)O)∶n(SiO_(2))=0.071,n(C_(2)H_(5)OH)∶n(SiO_(2))=1.77,晶化温度为160℃时,可合成具有高结晶度的纯相ZSM-5沸石。^(27)Al MAS NMR表征结果显示,合成的ZSM-5沸石主要含有骨架四配位铝,无非骨架铝。合成的ZSM-5沸石的比表面积和微孔孔体积分别为384 m^(2)/g和0.14 cm^(3)/g,总酸量达到789μmol/g,骨架n(Si)∶n(Al)=14.4。展开更多
Baivumebo iron ore is special magnetite containing fluorine,kalium and sodium elements,and the main raw material for ironmaking of Baotou Iron and Steel（Group） Co.The effects of basicity and ratio of Al2O3 to SiO2（...Baivumebo iron ore is special magnetite containing fluorine,kalium and sodium elements,and the main raw material for ironmaking of Baotou Iron and Steel（Group） Co.The effects of basicity and ratio of Al2O3 to SiO2（A/S） on the formation of silico-ferrite of calcium and aluminium（SFCA） in Baivumebo low silica sinters were studied by means of mini-sintering,XPF-500 optical mineralogical microscope and CSS-88000 electronic universal testing machine.The results show that it is beneficial to the formation of complex calcium ferrite to enhance the basicity of Baivumebo low silica sinters.The acicular SFCA-I was increased with the enhancing basicity and reached the peak at basicity 2.8,then the columnar or platy SFCA formed and the bonding strength decreased.Alumina is beneficial to the formation of acicular complex calcium ferrite in Baivumebo low silica sinters.But the residual unfused Al2O3 reagent came into being when A/S was 0.35,while complex calcium ferrite still remained to be acicular.There is a common rule about mineralogy components affected by basicity and ratio of A/S,that is,SFCA is increasing accompanied with hematite and porosity reduced,but the content of glass phase is stable展开更多
文摘研究了无有机胺醇水体系低硅铝比ZSM-5沸石的绿色合成方法。在无有机胺模板剂和不加晶种的醇水体系中,一步合成了形貌均一的小晶粒聚集体低硅铝比ZSM-5沸石,考察了合成体系中各配料的含量以及晶化温度对合成低硅铝比ZSM-5沸石的影响。利用XRD、FTIR、SEM、N_(2)吸附-脱附、^(27)Al MAS NMR和^(29)Si MAS NMR等方法对合成的ZSM-5沸石进行表征。实验结果表明,当n(Si)∶n(Al)=20,n(Na_(2)O)∶n(SiO_(2))=0.071,n(C_(2)H_(5)OH)∶n(SiO_(2))=1.77,晶化温度为160℃时,可合成具有高结晶度的纯相ZSM-5沸石。^(27)Al MAS NMR表征结果显示,合成的ZSM-5沸石主要含有骨架四配位铝,无非骨架铝。合成的ZSM-5沸石的比表面积和微孔孔体积分别为384 m^(2)/g和0.14 cm^(3)/g,总酸量达到789μmol/g,骨架n(Si)∶n(Al)=14.4。
基金Sponsored by Inner Mongolia Science Foundation of China(2009MS0702)
文摘Baivumebo iron ore is special magnetite containing fluorine,kalium and sodium elements,and the main raw material for ironmaking of Baotou Iron and Steel（Group） Co.The effects of basicity and ratio of Al2O3 to SiO2（A/S） on the formation of silico-ferrite of calcium and aluminium（SFCA） in Baivumebo low silica sinters were studied by means of mini-sintering,XPF-500 optical mineralogical microscope and CSS-88000 electronic universal testing machine.The results show that it is beneficial to the formation of complex calcium ferrite to enhance the basicity of Baivumebo low silica sinters.The acicular SFCA-I was increased with the enhancing basicity and reached the peak at basicity 2.8,then the columnar or platy SFCA formed and the bonding strength decreased.Alumina is beneficial to the formation of acicular complex calcium ferrite in Baivumebo low silica sinters.But the residual unfused Al2O3 reagent came into being when A/S was 0.35,while complex calcium ferrite still remained to be acicular.There is a common rule about mineralogy components affected by basicity and ratio of A/S,that is,SFCA is increasing accompanied with hematite and porosity reduced,but the content of glass phase is stable
