Spectra of CH4 Adsorbed on an NaZSM-5 Zeolite under Pressures up to 1 MPa

A special cell for measuring IR spectra of adsorbed species under pressures up to 1.5 MPa has been made. With this cell, the IR v1 absorption of methane adsorbed on an NaZSM-5 zeolite is obtained even at room temperature and at a moderately high pressure. The v1 absorption intensity increases linearly with the amount of methane adsorption. The electric field strength in the zeolite pore has been evaluated to be 3.6×109 V·m−1.