Highly Effective Utilization of Microporous Carbon with Structural Regularity of Zeolite

沸石结构规则的微孔碳的高效利用

基本信息

批准号：
13650825
负责人：
KYOTANI Takashi
金额：
$ 2.24万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

项目摘要

High surface area microporous carbons with a long-range ordering could be synthesized by using zeolite Y as a template. In this work, an attempt is made to synthesize porous carbon using several other types of zeolites (zeolite b, ZSM-5, mordenite and zeolite L). Special attention is paid to whether the structural regularity of each zeolite can be transferred to carbon structure as well as with the case of zeolite Y. It is then examined which carbon filling method gives the highest regularity to the carbon structure. It has found that the optimum carbon filling method for zeolite Y is not an optimum one for the other zeolites and the degree of the regularity of long-range ordering in the carbons strongly depends on zeolite type. The order of the regularity in the resultant carbons is zeolite b >> zeolite L > mordenite > ZSM-5. The effect of zeolite type on the regularity is closely related to the size and the shape of the zeolite channels.Extraordinary feature of the microporous carbon … More s prepared from zeolite Y is that mesopore volume is quite small in comparison with micropore volume, which is one of the necessary characteristics for methane storage media. Another feature is the predominance of large micropores such as supermicropore (size between 0.7 and 2 nm) in these carbons. It is well-known that theoretically such large micropore is favorable rather than the narrow micropore for high storage capacity of methane. Thus the present microporous carbons prepared by the template technique have great potential as methane storage media.The amounts of methane adsorbed at 3.5 MPa and 25 ℃ were measured to be 0.255 g/g of carbon, which is probably the largest one among the values reported so far. From practical point of view, methane uptake should be evaluated in terms of adsorption per unit volume. Since the present carbons cannot be pelletized without a binder, the volumetric uptake was not determined in this phase. Pelletizing using a binder and the measurement of volumetric methane uptake are now under investigation. As well as the application to methane storage media, the microporous carbons prepared from zeolite Y showed high performance in the application to super capacitor. Less

使用Y沸石作为模板可以合成具有长程有序的高表面积微孔碳。在这项工作中，尝试使用几种其他类型的沸石（沸石b、ZSM-5、丝光沸石和沸石）合成多孔碳。特别关注每种沸石的结构规律是否可以转移到碳结构以及沸石Y的情况。然后研究哪种碳填充方法。给出了碳结构的最高规律性。研究发现，强沸石Y的最佳碳填充方法对于其他沸石来说并不是最佳的，并且碳中长程有序的规律性程度取决于沸石类型。所得碳的规整性顺序为沸石b>>沸石L>丝光沸石>ZSM-5。沸石类型对规整性的影响与尺寸和形状密切相关。由沸石Y制备的微孔碳的非凡特征是中孔体积与微孔体积相比相当小，这是甲烷存储介质的必要特征之一，另一个特征是大孔体积的优势。这些碳中存在微孔，例如超微孔（尺寸在0.7至2纳米之间），众所周知，理论上如此大的微孔比狭窄的微孔更有利于高性能。因此，目前采用模板技术制备的微孔碳作为甲烷储存介质具有巨大的潜力。在3.5 MPa和25 ℃下测得的甲烷吸附量为0.255 g/g碳，这可能是最大的。迄今为止报告的数值之一。从实际角度来看，应根据单位体积的吸附量来评估甲烷吸收量，因为现有的碳不能在没有粘合剂的情况下造粒。在此阶段未确定使用粘合剂的造粒和体积甲烷吸收的测量以及在甲烷存储介质中的应用，由沸石 Y 制备的微孔碳在应用中表现出高性能。超级电容少。