Adsorption, condensation, and/or coagulation could be induced at low temperature zone formed by Joule-Thomson expansion as the pressurized air and pulverized activated carbon were introduced at the tangential direction into the vortex cyclone system applied with the coaxial funnel tube. Easily condensible vapors were adsorbed and/or condensed enforcedly on coagulated or condensed materials which were formed as cores for coagulation or condensation by themselves or on pulverized activated carbons. The maximum removal efficiency obtained from this experiment for the removal of carbon dioxide and phenol was achieved to about 87.3 and 93.8 percent, respectively. Phenol removal efficiency was increased with the relative humidities and enhanced by pulverized activated carbon added. In conclusion, it would be believed that the removal efficiency of VOCs could be controlled by moisture, particulate matters, and the pressure of the process air introduced.