| Project/Area Number |
11555196
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B).
|
| Allocation Type | Single-year Grants |
|---|
| Section | 展開研究 |
|---|
| Research Field |
Metal making engineering
|
|---|
| Research Institution | Osaka Prefecture University (2000)
Miyagi National College of Technology (1999) |
|---|
Principal Investigator |
AKIYAMA Tomohiro Graduate School, Chemical Engineering, Osaka Prefecture University, Associate Professor, 大学院・工学研究科, 助教授 (50175808)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
YAGI Jun-ichiro Institute For Advanced Materials Processing, Tohoku Univ., Professor, 素材工学研究所, 教授 (20006050)
|
|---|
| Project Period (FY) |
1999 – 2000
|
| Project Status |
Completed (Fiscal Year 2000)
|
| Budget Amount *help |
¥11,700,000 (Direct Cost: ¥11,700,000)
Fiscal Year 2000: ¥4,900,000 (Direct Cost: ¥4,900,000)
Fiscal Year 1999: ¥6,800,000 (Direct Cost: ¥6,800,000)
|
|---|
| Keywords | Molten slag / Heat recover / Green House Gas / Methane steam reforming / Slag pulverization / Hydrogen generation / 温暖化ガス / メタン / 炭酸ガス / 微粒化 |
|---|
| Research Abstract |
The aim of this project was to fundamentally study a possibility of new heat recovery system by using chemical endothermic reaction, in which high-temperature molten slag from the steel-making industry and the methane steam reforming reaction were selected. The research was classified into the two subjects.
1) Catalytic Property of Molten Slag :
The reforming rates of CH4+H2O=3H2+CO and CH4+CO2=2H2+2CO were measured under the different conditions of temperature, pressure, flowrate and slag compositions, and then was correlated by Arrehnius type equations. The results showed clearly the reaction occurs on the surface of molten slag without carbon deposition. The results also suggested the enlargement of surface area between gas and slag is needed for the completion of the reaction.
2) Process Design :
The two methods have a possibility of the heat exchanger between slag and reactant gas. One is top/bottom gas blowing type and another, slag pulverization.
Regarding the former, the shape of cavity is critical information for evaluating contacting area between gas and slag. However, such experimental data was not reported yet. In this study, we successfully observed the cavity under 1550 degree Celcius by using X-ray CT method. The shape was not parabolic, but cylindrical. This information will be helpful for process designing.
For pulverizing molten slag, the rotary cup atomizer was effective for controlling the size and shape of the slag. With increasing the rotating speed, the obtained particle decreased with uniform spherical shape. The obtained data of the particle was explained by the reported, semi-theoretical equations.
|
