排序方式: 共有2条查询结果,搜索用时 0 毫秒
1
1.
Prasetyoko D Ramli Z Endud S Hamdan H Sulikowski B 《Waste management (New York, N.Y.)》2006,26(10):1173-1179
White rice husk ash (RHA), an agriculture waste containing crystalline tridymite and alpha-cristobalite, was used as a silica source for zeolite Beta synthesis. The crystallization of zeolite Beta from RHA at 150 degrees C in the presence of tetraethylammonium hydroxide was monitored by XRD, FTIR and (29)Si MAS NMR techniques. It was found that zeolite Beta started to form after 12h and the complete crystallization of zeolite Beta phase was achieved after 2d. XRD, (29)Si MAS NMR and solid yield studies indicate that the transformation mechanism of silica present in RHA to zeolite Beta involves dissolution of the ash, formation of an amorphous aluminosilicate after 6h of crystallization, followed by dissolution in the mother liquor and final transformation to pure zeolite Beta crystals. 相似文献
2.
Tehubijuluw Hellna Subagyo Riki Yulita Maulil Fatma Nugraha Reva Edra Kusumawati Yuly Bahruji Hasliza Jalil Aishah Abdul Hartati Hartati Prasetyoko Didik 《Environmental science and pollution research international》2021,28(28):37354-37370
Environmental Science and Pollution Research - Red mud as industrial waste from bauxite was utilized as a precursor for the synthesis of mesoporous ZSM-5. A high concentration of iron oxide in red... 相似文献
1