%0 Conference Proceedings %T Comparison between the activity of nano-catalysts of Al-promoted and pure sulfated ziconia and optimization of condition in esterification of oleic acid %A Rahmanivahid, Behgam %A Nayebzadeh, Hamed %A Saghatoleslami, Nasser %A MASKOOKI, ABDOLMAJID %J 4th international conference on nanostructures %D 2012