| Project/Area Number |
14550205
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Thermal engineering
|
|---|
| Research Institution | Ishinomaki Senshu University (2003)
Miyagi National College of Technology (2002) |
|---|
Principal Investigator |
IZUMI Masaaki Ishinomaki Senshu University, Science and Engineering, Professor, 理工学部, 教授 (90143015)
|
|---|
| Project Period (FY) |
2002 – 2003
|
| Project Status |
Completed (Fiscal Year 2003)
|
| Budget Amount *help |
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 2003: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2002: ¥1,600,000 (Direct Cost: ¥1,600,000)
|
|---|
| Keywords | Thermal Properties / Carbonized Material / Waste Paper / Carbonization |
|---|
| Research Abstract |
Carbonized materials are useful for various industries as a raw material of carbon black, activated carbon and so on. The waste paper that is ground into a cottony state was found to be available as a source material of activated carbon. Considering the design of the carbonization process of cottony paper, its thermal properties in the process are necessary.
The purpose of this investigation is to develop the method of measuring the thermal diffusivity and conductivity simultaneously and to measure the thermal properties of cottony paper during carbonization.
The measuring method was based upon the principle of the inverse method of heat conduction. The experiment was performed by packing the cottony paper in a semifinite cylindrical vessel and heating uniformly from the outside in a given constant temperature rising rate and measuring the temperatures of the vessel wall, the sample and the air cylinder which was set along the center-line of the vessel. The thermal diffusivity of the sample was decided as to make the solution of the equation of heat conduction coincident with measured temperatures. Then, the thermal conductivity was decided by heat balance at the boundary between the sample and the air cylinder, which was used as standard substance of thermal properties.
The thermal conductivity of cottony paper became large at the higher packing density and increased with increment of temperature for every packing density. The increasing of the effective thermal conductivity of the cottony paper is thought to be the reason why the thermal conductivity of air, which composes the cottony paper, increases with temperature. As to the effect of the packing density, since the thermal conductivity of fibres is higher than that of air, the conductivity should increase with the packing density.
|
