土源对催化裂化催化剂性能的影响
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摘要
采用X射线衍射仪、X射线荧光光谱仪、N2吸附-脱附仪等仪器对高岭土、埃洛土及累托土进行了表征,并考察了3种土源对所制备催化裂化(FCC)催化剂性能的影响。结果表明:3种土源的主要化学组分均为Si O2和Al2O3;埃洛土的孔体积和比表面积最大,高岭土次之,累托土最小;累托土的平均粒径最大,高岭土最小; 3种土源作为FCC催化剂的载体,均可有效保护Y型分子筛的活性中心不被破坏,并且制得的催化剂均具有较高的裂化活性,高岭土、埃洛土制得的催化剂具有较好的产品选择性,累托土制得的催化剂产品选择性和焦炭选择性均较差。
The kaolin,halloysite and rectorite were characterized by X-ray diffraction,X-ray fluorescence spectrometer,and N2adsorption-desorption,etc,and the properties of fluid catalytic cracking catalysts( FCC) prepared by the three kinds of soil sources were investigated. The results showed that the main chemical components of the three soil samples were SiO2 and Al2O3. The pore volume and specific surface area of the halloysite were the largest,the next was kaolin,and the last was rectorite. The average particle size of rectorite was the largest,and the kaolin was the smallest.With the three soil sources as the carriers of FCC catalyst,the active center of Y zeolite could be protected from destroying,the prepared the catalysts had higher cracking activity,the catalyst from kaolin and halloysite had better selectivity,and the catalyst from rectorite had poorer selectivity and coke selectivity.
The kaolin,halloysite and rectorite were characterized by X-ray diffraction,X-ray fluorescence spectrometer,and N2adsorption-desorption,etc,and the properties of fluid catalytic cracking catalysts( FCC) prepared by the three kinds of soil sources were investigated. The results showed that the main chemical components of the three soil samples were SiO2 and Al2O3. The pore volume and specific surface area of the halloysite were the largest,the next was kaolin,and the last was rectorite. The average particle size of rectorite was the largest,and the kaolin was the smallest.With the three soil sources as the carriers of FCC catalyst,the active center of Y zeolite could be protected from destroying,the prepared the catalysts had higher cracking activity,the catalyst from kaolin and halloysite had better selectivity,and the catalyst from rectorite had poorer selectivity and coke selectivity.
引文
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[2]吴铁轮.我国高岭土市场现状及展望[J].非金属矿,2004,27(1):1-4.
[3]肖灿兰,吴喜贤.桃江高岭土成分分析[J].湖南城市学院学报(自然科学版),2010,19(3):59-61.
[4]林艳.梅州高岭土成分分析[J].广东化工,2011,38(10):161-162.
[5]谢彦芳.埃洛石纳米管-多糖复合材料的制备与应用[D].天津:天津大学,2012.
[6]李小帆,管俊芳,程飞飞,等.云南西双版纳埃洛石特征研究[J].矿物学报,2016,36(1):138-142.
[7]张术根,丁俊,刘小胡.辰溪仙人湾埃洛石的晶体结构、形貌及应用[J].中南大学学报(自然科学版),2006,37(5):896-902.
[8]刘海燕,鲍晓军,曹丽媛,等.一种ZSM-5/累托石复合催化材料及其制备方法:中国,101722024 A[P]. 2010.
[9]王玉飞,闫龙,陈碧,等.榆林高岭土原矿的性能分析[J].硅酸盐通报,2016,35(2):492-495.
[10]胡为正,何淑芳,黄孝文,等.江西萍乡北冲高岭土矿床中的埃洛石研究[J].东华理工学院学报,2006,29(2):140-145.
[11]何利喜,何北海,赵丽红,等.茂名高岭土在不同煅烧温度下结构与性能分析[J].技术进步,2010,31(24):29-32.