"Chandra Wahyu Purnomo,Chris Salim,Hirofumi Hinode","Synthesis of pure Na-X and Na-A zeolite from bagasse fly ash",,"Microporous and Mesoporous Materials",,"Volume 162",,"Page 6-13",2012,Nov. "Chandra Wahyu Purnomo,Chris Salim,Hirofumi Hinode","Effect of the activation method on the properties and adsorption behavior of bagasse fly ash-based activated carbon",,"Fuel Processing Technology",,"Volume 102",,"Page 132-139",2012,May