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

Quimica nova

Prayoonpokarach, Sanchai¹  Rintramee, Kamolwan¹  Wittayakun, Jatuporn¹  Leon, Rizalinda L. de²  Saceda, Jan-Jezreel F.² 

[1] Suranaree University of Technology,, Thailand;University of the Philippines, Philippines

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 comparedproperties of silica (SiO2) from rice husk (RH) and rice husk ash(RHA) extracted by acid- and heat-treatment. The SiO2 from RH wasin amorphous phase with nearly 100% purity while that from RHA was in crystallinephase with 97.56% purity. Both extracted SiO2 were used in the synthesisof zeolite NaY but that from RH was better due to the efficiency in productrecovery and simplicity of extraction. After the NaY was exchanged to NH4Yand calcined to convert to HY, the product did not carry over the textural propertiesof the parent NaY and NH4Y.

【 授权许可】

CC BY