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Development of the adsorbent for heat storage system using iron and steel making slag as source material

以钢铁渣为原料的蓄热系统吸附剂的研制

基本信息

批准号：
14550681
负责人：
OUCHI Chiaki
金额：
$ 1.86万
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：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550681/
关键词：
heat storage materials zeolite zeolite A iron and steel making slag blast furnace slag alkali hydrothermal synthesis recycling water vapor adsorption 水蒸気吸着熱蓄熱システム吸着剤水熱合成トバーモライト水酸化カルシウム水砕スラグ

项目摘要

The heat storage system using water vapor adsorption to zeolite materials is getting much attention because of extremely high energy density and flexibility of process. The composition of zeolite A can be shown as M_XAl_XSi_<1-X>・nH_O. The hydrophiic property of zeolite A is excellent because of high Al/Si ration in the zeolite A. The blast furnace slag mainly consists of SiO_2, Al_2O_3, CaO and MgO. Since Ca and Mg can be introduced to zeolite A as M, the blast furnace slag is a promising candidate for source materials of zeolite A. In the present work, the alkali hydrothermal process for production of zeolite A from the blast furnace slag as a source material was investigated. The following results were obtained;1.Zeolite A can be synthesized from SiO_2-Al_2O_3-CaO slag by hydrothermal treatment in the conditions;Temperature: 328-393NaOH: 0.5-3 MNaOH solution : slag (source material): 15 (mug)2.The zeolite A synthesized by the hydrothermal process was thermally stable up to 873 K.3.In order to obtain zeolite A from blast furnace slag in the hydrothermal process, the adjustment of composition was needed. It was required to decrease the content of CaO+MgO in the blast furnace slag. The less the content of CaO+MgO, The more the ratio of zeolite A to total products after hydrothermal synthesis.4.The rate of the hydrothermal reaction increased by using the ball-mill-type chamber.5.It was confirmed that the zeolite A obtained in the present work was applicable to the heat storage system because endothermic reaction was observed during the heating of the zeolite A.

沸石材料利用水蒸气吸附的储热系统因其极高的能量密度和工艺的灵活性而备受关注。A沸石的组成为M_xAl_xSi_t；1-X&gt；·nH_O。由于沸石中铝硅比高，A沸石具有良好的亲水性。高炉渣主要由SiO_2、Al_2O_3、CaO和MgO组成。由于钙和镁可以以M的形式引入到A型沸石中，因此高炉渣是一种很有前途的A型沸石原料。结果表明：1.以SiO_2-Al_2O_3-CaO炉渣为原料，在温度328-393NaOH：0.5-3MNaOH溶液：炉渣(原料)：15(杯)的条件下，水热合成A型沸石。要求降低高炉渣中CaO+MgO的含量。CaO+MgO含量越少，水热合成后A型沸石占总产物的比例越大。4.采用球磨式水热室，提高了A型沸石的水热反应速率。5.由于A型沸石在加热过程中发生了吸热反应，证实了本文所制得的A型沸石适用于蓄热系统。