[1]孔黎明,等.超声对SAPO-34分子筛合成的影响[J].南京理工大学学报(自然科学版),2007,(04):528-532.
 KONG Li-ming,LIU Xiao-qin,LIU Ding-hua.Effects of Ultrasound on SAPO-34 Molecular Sieve Synthesis[J].Journal of Nanjing University of Science and Technology,2007,(04):528-532.
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超声对SAPO-34分子筛合成的影响
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
期数:
2007年04期
页码:
528-532
栏目:
出版日期:
2007-08-30

文章信息/Info

Title:
Effects of Ultrasound on SAPO-34 Molecular Sieve Synthesis
作者:
孔黎明1 2 刘晓勤1 刘定华1
1. 南京工业大学化学化工学院, 江苏南京210009; 2. 扬州大学化学化工学院, 江苏扬州225009
Author(s):
KONG Li-ming12LIU Xiao-qin1LIU Ding-hua1
1.College of Chemistry and Chemical Engineering,Nanjing University of Technology,Nanjing 210009,China;2.College of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225009,China
关键词:
超声 分子筛 SAPO-34 合成
Keywords:
ultrasound molecu lar sieves SAPO-34 synthesis
分类号:
O643.36
摘要:
为提高SAPO-34分子筛的催化性能,对SAPO-34分子筛晶化原液进行超声辐照处理,研究了超声辐照对SAPO-34分子筛合成的影响。采用XRD、SEM、FT-IR和DTG等表征手段对分子筛样品进行了表征。超声作用后晶体的晶化速率和结晶度有所提高,合成的SAPO-34分子筛样品更纯净,分子筛的晶粒大小分布更均匀,平均粒径明显降低。而且超声处理后分子筛的热稳定性更好。甲醇制烯烃催化反应结果表明,超声处理后合成的SAPO-34分子筛对烯烃的选择性有所提高。
Abstract:
The effects of ultrasound irrad iation on SAPO-34 molecular sieve synthesis are investigated for improving its catalyt ic performance inMTO (M ethano l to o lefin) . The molecular sieve samp les are characterized w ith XRD, SEM, FT-IR, and DTG techniques. XRD results show that the crysta llization rate and the crystallinity of SAPO-34 increase apparently after u ltrasound irrad iation. SEM resu lts show that the crysta l size becom es sm aller and the size d istribution becomes narrow er a-f ter u ltrasound irradiation. U ltrason ic-w ave treatment is effective in improv ing the thermal stab ility o f SAPO-34molecular sieve. MTO ca talyt ic reaction show s that the SAPO-34mo lecular sieve of smaller crysta l size has h igher selectiv ity to ethy lene and propy lene.

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备注/Memo

备注/Memo:
作者简介: 孔黎明( 1971- ), 女, 江苏泰兴人, 讲师, 主要研究方向: 超声应用与工业催化, E-m a il:kong lm yzu@ sohu.com;
通讯作者: 刘晓勤( 1958- ) , 江苏南通人, 教授, 博士生导师, 主要研究方向: 吸附分离与工业 催化, E-ma il:liuxq@ n jut. edu. cn。
更新日期/Last Update: 2007-08-30