Composite Molecular Sieves Synthesized by Two-stage Crystallization

Abstract

Abstract:

ZSM-5(core)/SAPO-5(shell) binary structure composite molecular sieves were synthesized by two-stage varying-temperature syntheses, which includes the lower first-stage temperatures and higher second-stage temperatures. The effect of syntheses conditions on the formation and character of core/shell structure zeolite was investigated. These synthesized samples were characterized by XRD, SEM, EDS, FTIR and N₂-adsorption, respectively. In result, compared with the direct high temperature method, the crystallinity of SAPO-5 in composite is lower and that of alone SAPO-5 zeolite is higher by two-stage varying-temperature syntheses at shorter time. So two-stage varying-temperature syntheses can improve the formation core-shell structure zeolies, reduce amounts of self-existent SAPO-5 zeolite.

Key words: Core-shell binary structure zeolite, ZSM-5, SAPO-5, Two-stage crystallization

CLC Number:

O614
O643

TrendMD:

ZHANG Qiang*, CUI Qiu-Kai, LI Chun-Yi, SHAN Hong-Hong, YANG Chao-He. Composite Molecular Sieves Synthesized by Two-stage Crystallization[J]. Chem. J. Chinese Universities, 2009, 30(6): 1060.

References

[1]Fan Y., Lei D., Shi G., et al.. Catalysis Today[J], 2006, 114(4): 388—396
[2]Bouizi Y., Rouleau L., Valtchev V. P.. Micropor. Mesopor. Mater.[J], 2006, 91(1—3): 70—77
[3]ZHANG Qiang(张强), LI Chun-Yi(李春义), SHAN Hong-Hong(山红红), et al.. Chem. J. Chinese Universities(高等学校化学学报)[J], 2007, 28(11): 2030—2034
[4]Tsang C. H. M., Dai P. S. E., Petty R. H.. Binary Molecular Sieves Having a Core and Shell of Different Structures and Compositions[P], US 5888921, 1999
[5]ZHANG Zhe(张哲), ZONG Bao-Ning(宗保宁). Chin. J. Catal.(催化学报)[J], 2003, 24(11): 856—860
[6]ZHANG Zhe(张哲), ZONG Bao-Ning(宗保宁), MU Xu-Hong(慕旭宏), et al.. The Synthesis Method of ZSM-5/AlPO4-5 Binary Structure Zeolite(一种ZSM-5/AlPO4-5双结构分子筛的合成方法)[P], CN 03105399.8, 2003
[7]LIAN Pi-Yong(连丕勇), WANG Fu-Li(王富丽), HUANG Shi-Yong(黄世勇), et al.. The Synthesis Method of ZSM-5/MAPO-5 Binary Structure Zeolite(一种ZSM-5沸石与MAPO-5双结构分子筛的合成方法)[P], CN 200610046246.8, 2006
[8]LIAN Pi-Yong(连丕勇), WANG Fu-Li(王富丽), HUANG Shi-Yong(黄世勇), et al.. The Synthesis Method of Y/MAPO-5 Binary Structure Zeolite(一种Y沸石MAPO-5双结构分子筛的合成方法)[P], CN 200610046248.7, 2006
[9]LIAN Pi-Yong(连丕勇), WANG Fu-Li(王富丽), HUANG Shi-Yong(黄世勇), et al.. The Synthesis Method of β/MAPO-5 Binary Structure Zeolite(一种β沸石与MAPO-5双结构分子筛的合成方法)[P], CN 200610046247.2, 2006
[10]MA Guang-Wei(马广伟), XU Zhong-Qiang(许中强), ZHANG Hui-Ning(张慧宁), et al.. Journal of the Chinese Ceramic Society(硅酸盐学报)[J], 2005, 33(2): 180—186
[11]Kim S. D., Noh S. H., Park J. W., et al.. Micropor. Mesopor. Mater.[J], 2006, 92(1—3): 181—188
[12]Sinha A. K., Sainkar S., Sivasanker S.. Micropor. Mesopor. Mater.[J], 1999, 31(3): 321—331
[13]ZHANG Qiang(张强), LI Chun-Yi(李春义), SHAN Hong-Hong(山红红), et al.. Chin. J Catal.(催化学报)[J], 2007, 28(6): 541—546
[14]Li Q., Creaser D., Sterte J.. Micropor. Mesopor. Mater.[J], 1999, 31(1/2): 141—150
[15]Larlus O., Valtchev V., Patarin J., et al.. Micropor. Mesopor. Mater.[J], 2002, 56(2): 175—184
[16]Xiao T. C., An L. D. , Wang H. L.. Appl. Catal. A: General[J], 1995, 130(2): 187—194
[17]Schnabel K. H., Finger G., Kornatowaki J.. Mircopor. Mater.[J], 1997, 11(5/6): 293—302
[18]SHEN Bao-Jian(申宝剑), HUANG Hai-Yan(黄海燕), XU Chun-Ming(徐春明). Acta Chimica Sinica(化学学报)
[J], 2003, 61(12): 1904—1910
[19]GUO Wan-Ping(郭万平), HUANG Li-Min(黄立民), CHE Hai-Ying(陈海鹰). Chem. J. Chinese Universities(高等学校化学学报)[J], 1999, 20(3): 356—358
[20]XU Ru-Ren(徐如人), PANG Wen-Qin(庞文琴), YU Ji-Hong(于吉红), et al.. Molecular Sieve and Porosint Materials Chemistry(分子筛与多孔材料化学)[M], Beijing: Science Press, 2004: 250—254