摘要
以粉煤灰为原料,在微波辐射条件下,采用多段技术合成了NaP1型和NaA型沸石,考察并讨论了氢氧化钠的浓度、液固比以及添加剂等对沸石产品的阳离子交换性能(CEC)的影响.研究结果表明,沸石产品的CEC值随着氢氧化钠浓度的升高和液固比的增加呈增加趋势,至氢氧化钠浓度为2 mol/L和液固比为8 mL/g时达到最大值.在此最佳条件下,NaP1和NaA两种沸石产品的CEC值分别为159.2 mmol/100 g和157.7 mmol/100 g.NaF、十六烷基三甲基溴化铵和95%乙醇等3种添加剂可以明显地改善NaP1和NaA两种沸石产品的CEC值.研究结果显示,微波多段合成技术在沸石合成过程中起到了重要的作用,不仅缩短了合成时间,而且保持了产品的高离子交换性能.
Under the condition of microwave irradiation, the fly ash was used as raw material to synthesize the NaP1 and the NaA zeolite by applying multi-stage synthesis method. The effect of concentration of sodium hydroxide, liquid/solid ratio and additives on the cation exchange capacity （CEC） of zeolite were investigated. The results indicate that the CEC value of zeolite products increase as a function of concentration of sodium hydroxide and liquid/solid ratio. There are maximum CEC value of NaP1 and NaA zeolite products at the NaOH concentration of 2 mol/L and the liquid/solid ratio 8 mL/g. The CEC value of NaP1 and NaA zeolite products are 159.2 mmol/ 100 g and 157.7 mmol/100 g respectively. The CEC value of NaP1 and NaA zeolite is greatly improved by the additives such as NaF, lauryl benzene sulfonic acid sodium and 95% ethanol. The results also indicate that multistage synthesis method during zeolite synthesis plays an important role in reducing the overall synthesis time while maintaining high CEC values for the products.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2009年第7期966-970,共5页
Journal of China Coal Society
基金
山东省优秀中青年科学家科研奖励基金资助项目(2005BS08002)
关键词
粉煤灰沸石
微波
多段合成
阳离子交换性能
coal fly ash zeolite
microwave
multi-stage synthesis
cation exchange capacity （CEC）
