| Title |
The Effect of Temperature on VOCs‘ Effective Diffusion Coefficients of Building Materials |
| Authors |
Choi Eun-Sun ; Kwon Kyung-Woo ; Park Jun-Seok |
| Keywords |
VOCs ; Emission ; Effective Diffusion Coefficient ; Building Materials ; Temperature |
| Abstract |
The purpose of this study is to evaluate the effect of temperature on the effective diffusion coefficient of VOCs in building materials. Cup method was used for measuring effective diffusion coefficients of three VOCs, such as toluene, ethylbenzene and decane, in seven single-layer materials. The effective diffusion coefficients of three VOCs are estimated from 257.5X10-8 to 0.2X10-8[m2/sec], and they are increased according to increasing of temperature in the single-layer materials. The mass transfer rate at the surface of the materials were ranged from 1.2X10-7 to 4.8X10-7[m/sec]. The change of the effective diffusion coefficients of VOCs according to the temperature shows good fit with Arrhenius' low, and the E values, empirically determined coefficient [K], are were from 3,000 [K] to 5,500[K]. From the experiments, it is suggested that the changes of VOCs emissions from multi-layer materials at different temperature condition, can be predicted using the effective diffusion coefficients and E values of each single-layer materials through the numerical methods. |