| 向永生,胡晓荣,岳源源,王磊,鲍晓军,姚文君,李景锋,张岩.以天然矿物为全部硅铝源低成本绿色合成ZSM-5分子筛的研究[J].分子催化,2019,33(3):219-228 |
| 以天然矿物为全部硅铝源低成本绿色合成ZSM-5分子筛的研究 |
| Study on Low Cost Green Synthesis of ZSM-5 Zeolite Using Natural Minerals as All Silicon and Aluminum Sources |
| 投稿时间：2019-03-22 修订日期：2019-04-23 |
| DOI： |
| 中文关键词: 硅藻土 累托土 ZSM-5 合成条件 水热稳定性 |
| 英文关键词:diatomite rectorite ZSM-5 synthesis conditions hydrothermal stability |
| 基金项目:国家自然科学基金（91434206）；国家青年科学基金（21506034）；中国石油科技项目（kywx-18-015） |
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| 中文摘要: |
| ZSM-5分子筛被广泛地应用于催化、吸附分离、离子交换和绿色化工等领域，但目前其合成主要是以无机化学品为硅铝源，从源头来看是非绿色化的过程.我们以热活化的硅藻土和亚熔盐活化的累托土为全部硅铝源，通过调变两种矿物的加入比例调变合成体系的硅铝比，在水热合成体系中制备ZSM-5分子筛.系统地考察模板剂用量、碱度、投料硅铝比、晶化时间等合成条件对产物结构和性质的影响，并对在最优条件下合成的ZSM-5分子筛的物化性质进行了详细地表征，结果表明：以天然矿物为全部硅铝源可以合成出具有较高结晶度、晶粒尺寸约为4 μm的六面体挛晶形貌的ZSM-5分子筛，该分子筛比商业ZSM-5分子筛具有更高的水热稳定性和更优的加氢异构性能. |
| 英文摘要: |
| ZSM-5 zeolite is widely used in catalysis, adsorption and separation, ion exchange and green chemical industry, but its synthesis is mainly based on inorganic chemicals as silicon-aluminum source, which is a non-green process from the source. In this paper, ZSM-5 zeolite was prepared in hydrothermal synthesis system by adjusting the ratio of silicon to aluminum in the synthesis system by using thermally activated diatomite and submolten salt activated rectorite as all silicon-aluminum sources. The effects of synthesis conditions such as template dosage, basicity, ratio of silicon to aluminum and crystallization time on the structure and properties of ZSM-5 zeolite were systematically investigated. The physical and chemical properties of ZSM-5 zeolite synthesized under the optimum conditions were characterized in detail. The results showed that hexahedral crystalline morphology with high crystallinity and grain size of about 4 microns could be synthesized by using natural minerals as all sources of silicon and aluminum. ZSM-5 zeolite has higher hydrothermal stability than commercial ZSM-5 zeolite. |
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