燕山大学学报Issue(3)：206-210,5.DOI:10.3969/j.issn.1007-791X.2013.03.004
金属盐类对L沸石伴生杂晶的抑制作用
Suppressing effect of metal salts on mixed crystal with growth of zeolite L
摘要
Abstract
Different metal salts are introduced into the synthetic system of zeolite L, and the suppressing effects of the mixed crystal W are investigated. X-ray diffraction (XRD), nitrogen adsorption isotherms and scanning electron microscopy (SEM) are used for the physicochemical characterization of zeolite samples. The results indicate that a small number of zeolite W crytsal seeds added into the synthetic system of zeolite L remarkably decrease the relative crystallinity of zeolite L, leading to the increase of the peak intensity ratio of zeolite W to zeolite L, / . However, zeolite W could be effectively suppressed by the different metal salts among which magnesium nitrate ( ) is proven to facilitate to suppress the mixed crystal. And the suppressing effect ex-hibited optimal with , relative crystallinity of zeolite L and / being 150 g/g, 88.3%, and 0.047. The decrease rate of the / value is 91.2% compared with the sample without suppressing agents. The results also show that the appropriate amount of Mg NO3 2 is very effective in suppressing the formation of zeolite W in the synthetic system of 10 L autoclave for zeolite L. Zeolite W phase is not detected in the synthetic sample, where the relative crystalllinity is 98.6%.关键词
L 沸石/W 沸石/杂晶/抑制作用Key words
zeolite L/zeolite W/mixed crystal/suppressing effect分类
化学化工引用本文复制引用
霍全,宋建争,林立君,宋金凤,潘惠芳..金属盐类对L沸石伴生杂晶的抑制作用[J].燕山大学学报,2013,(3):206-210,5.基金项目
国家自然科学基金资助项目（21106123）；秦皇岛市科学技术研究与发展计划项目 （）
