Development of the adsorbent for heat storage system using iron and steel making slag as source material
Grant-in-Aid for Scientific Research (C)
|Allocation Type||Single-year Grants|
|Research Institution||TOHOKU UNIVERSITY|
OUCHI Chiaki(2003) Tohoku Univ., Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (00312603)
渡辺 雅俊(2002) 東北大学, 大学院・工学研究科, 講師 (10240524)
SAHARA Ryoji Tohoku Univ., Institute for Materials Research, Res.Assistant, 金属材料研究所, 助手 (30323075)
NARUSHIMA Takayuki Tohoku Univ., Graduate School of Engineering, Asso.Professor, 大学院・工学研究科, 助教授 (20198394)
大内 千秋 東北大学, 大学院・工学研究科, 教授 (00312603)
|Project Period (FY)
2002 – 2003
Completed(Fiscal Year 2003)
|Budget Amount *help
¥2,900,000 (Direct Cost : ¥2,900,000)
Fiscal Year 2003 : ¥1,100,000 (Direct Cost : ¥1,100,000)
Fiscal Year 2002 : ¥1,800,000 (Direct Cost : ¥1,800,000)
|Keywords||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|
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;
NaOH: 0.5-3 M
NaOH 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.
Research Products (4results)