以稻壳灰为硅源制备SAPO-34分子筛
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引用本文:刘晨,申韬艺,陈通,刘震,汪宏星,应思斌,王利军.以稻壳灰为硅源制备SAPO-34分子筛[J].上海第二工业大学(中文版),2020,(4):291-297
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作者单位
刘晨 1. 上海第二工业大学环境与材料工程学院, 上海201209
 
申韬艺 1. 上海第二工业大学环境与材料工程学院, 上海201209
 
陈通 1. 上海第二工业大学环境与材料工程学院, 上海201209
 
刘震 2. 浙江新化化工股份有限公司, 杭州311607 
汪宏星 2. 浙江新化化工股份有限公司, 杭州311607 
应思斌 2. 浙江新化化工股份有限公司, 杭州311607 
王利军 1. 上海第二工业大学环境与材料工程学院, 上海201209
 
基金项目:上海第二工业大学研究生项目基金(EGD19YJ0037) 资助
中文摘要:以不同温度条件下焙烧得到的稻壳灰为硅源, 采用水热法合成SAPO-34 分子筛, 考察了不同温度条件下焙 烧得到的稻壳灰中的二氧化硅的形态及其活性, 并进一步研究其对合成所得SAPO-34 晶体结构、形貌的影响。采用 示差同步扫描热分析仪(TG-DSC)、傅里叶红外光谱(FTIR)、X 射线衍射仪(XRD) 和扫描电镜(SEM) 等对稻壳灰 及合成的SAPO-34 分子筛的微观结构及形貌进行表征。结果表明: 不同温度条件下焙烧得到的稻壳灰中二氧化硅 的形态和活性差异较大, 对后期合成的SAPO-34 分子筛的晶形有着较为显著的影响。稻壳最佳焙烧温度为600 ℃, 该温度下得到的稻壳灰有利于SAPO-34 晶体的合成, 且合成的SAPO-34 分子筛结晶度最好。
中文关键词:稻壳灰  温度  SAPO-34 分子筛
 
Preparation of Sapo-34 Molecular Sieve withRice Husk Ash as Silicon Source
Abstract:Using rice husk ash obtained by pyrolysis under different temperature conditions as silicon source, SAPO-34 molecular sieve was synthesized by hydrothermal method, and the form and activity of silica in rice husk ash obtained by pyrolysis under different temperature conditions were investigated, which were used to study the influences of structure and morphology of synthetic SAPO- 34. By means of differential simultaneous scanning thermal analyzer (TG-DSC), Fourier red infrared spectroscopy (FTIR), X-ray diffractometer (XRD) and scanning electron microscope (SEM), the microstructure and morphology of rice husk ash and the synthesized SAPO-34 molecular sieve were characterized. The results show that the morphology and activity of silica in rice husk ash obtained by pyrolysis at different temperatures are quite different, which has a significant impact on the crystal shape of SAPO-34 molecular sieve synthesized in the later stage. The best pyrolysis temperature of rice husk is 600 ℃. The rice husk ash obtained at this temperature is beneficial to the synthesis of SAPO-34 crystals, and the synthesized SAPO-34 molecular sieve has the best crystallinity.
keywords:rice husk ash  temperature  SAPO-34 molecular sieve
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