Development of novel preparation method for monolithic and fibrous zeolites by unidirectional freezing of gels

凝胶单向冷冻制备整体式和纤维状沸石的新方法的开发

• 批准号: 23360342
• 负责人: TAMON Hajime
• 金额: $ 12.4万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23360342/
• 关键词: ゾル－ゲル法; 一方向凍結; 水蒸気結晶化; ゼオライトモノリス; ゼオライト繊維; ゾルーゲル法; モノリス状ゼオライト; 繊維状ゼオライト; 構造規定剤; モノフォロジー; ミクロ細孔構造

Silica-alumina hydrogels were synthesized by a sol-gel method as zeolite precursors, and monolithic or fibrous zeolites were prepared by unidirectional freezing of the hydrogels, drying, and steam-assisted crystallization (SAC) using structure-directing agent (SAD). Zeolites prepared in the present work showed excellent properties, which satisfied an objective of development, and their degree of crystallinity and crystal size could be controlled by changing the SDA concentration, SAC temperature, and SAC time. The influence of Si/Al ratio on the hydrophilic property of zeolite was also examined. It was found that the hydrophilic or hydrophobic property could be controlled by choosing the Si/Al ratio. In addition, a controlling method of morphology of zeolite was proposed by using experiments and heat transfer simulation of unidirectional freezing.

以分子筛为前驱体，采用溶胶-凝胶法合成硅铝水凝胶，经定向冷冻、干燥、结构导向剂(SAD)蒸汽辅助结晶(SAC)制得整体型或纤维型分子筛。通过改变SDA浓度、SAC温度和SAC时间，可以控制分子筛的结晶度和晶粒度。考察了硅铝比对沸石亲水性的影响。研究发现，通过选择Si/Al比可以控制材料的亲水性或疏水性。此外，通过实验和单向冻结的传热学模拟，提出了沸石形貌的控制方法。

项目成果

Synthesis of zeolite monolith with hierarchical micro /macropores by ice-templating and steam-assisted crystallization

冰模板和蒸汽辅助结晶法合成分级微孔/大孔沸石整体料

• 发表时间: 2013
• 作者: Hajime Tamon;Takuya Akatsuka;Hiroki Mori;Noriaki Sano
• 通讯作者: Noriaki Sano

水蒸気結晶化法を用いたゼオライト繊維の作製

蒸汽结晶法制备沸石纤维

• 发表时间: 2012
• 作者: Ookubo;T.;Nishihama;S.;Yoshizuka;K.;H. Minakuchi;植田芳昭,井口学;田門 肇，岩谷 崇，佐野紀彰
• 通讯作者: 田門 肇，岩谷 崇，佐野紀彰

水蒸気結晶化法を用いたシリカライト繊維の作製

蒸汽结晶法制备硅沸石纤维

• 发表时间: 2011
• 作者: 岩谷 崇;渡辺 寛明;森 弘喜;佐野 紀彰;田門 肇
• 通讯作者: 田門 肇

Synthesis of zeolite monolith with hierarchical micro/macropores by ice-templating and steam-assisted crystallization

冰模板和蒸汽辅助结晶合成具有分级微孔/大孔的沸石整体料

• 发表时间: 2013
• 期刊: Chem. Eng. Trans.
• 作者: Hajime Tamon;Takuya Akatsuka;Hiroki Mori;Noriaki Sano
• 通讯作者: Noriaki Sano

一方向凍結と水蒸気結晶化を用いたゼオライト繊維の作製と特性評価

单向冷冻和蒸汽结晶沸石纤维的制备和表征

• 发表时间: 2012
• 作者: 岩谷 崇;佐野 紀彰;田門 肇
• 通讯作者: 田門 肇