According to the equation of Bragg (Bragg ', s equationN = 2dsin) that, when the 2theta increases, the d-spacing is reduced, so the removal of aluminum by acid HCl higher concentrations. 2M it will affect the phase between the plane of NaZSM-5 decreased, which may reflect the distortion of plane, these จากผลึก NaZSM-5The intensity of the main peaks are eliminating aluminium are also high value when compared with the NaZSM-5 showed that the crystallinity of zeolite after removal of aluminium is also high in
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