Organic template free synthesis of ZSM-5 from calcinated Indonesian kaolin

A pure ZSM-5 has been synthesized from calcinated kaolin without organic template. The synthesized samples were characterized using X-ray diffraction (XRD), Fourier Transform Infrared (FTIR) spectroscopy, nitrogen adsorption/desorption technique, and Transmission Electron Microscopy (TEM). The results showed that microporous ZSM-5 obtained by silica adding through three-step crystallization at 100-120-150 °C for 24 h respectively.