Properties of silica from rice husk and rice husk ash and their utilization for zeolite y synthesis

Química Nova

University of the Philippines, Philippines¹  Leon, Rizalinda L. de¹  Prayoonpokarach, Sanchai¹  Saceda, Jan-Jezreel F.¹  Rintramee, Kamolwan¹  Suranaree University of Technology,, Thailand¹  Wittayakun, Jatuporn¹ 

关键词: silica;    rice husk;    rice husk ash.;   

DOI  :  10.1590/S0100-40422011000800018

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

This study compared properties of silica (SiO2) from rice husk (RH) and rice husk ash (RHA) extracted by acid- and heat-treatment. The SiO2 from RH was in amorphous phase with nearly 100% purity while that from RHA was in crystalline phase with 97.56% purity. Both extracted SiO2 were used in the synthesis of zeolite NaY but that from RH was better due to the efficiency in product recovery and simplicity of extraction. After the NaY was exchanged to NH4Y and calcined to convert to HY, the product did not carry over the textural properties of the parent NaY and NH4Y.

【 授权许可】

Unknown