SYNTHESIS OF CO3O4/ZSM-5 USING RICE HUSK ASH AS THE SOURCE OF SILICA
Fischer-Tropsch reaction has low selectivity because it produces hydrocarbon of various chain length. The selectivity of Fischer-Tropsch reaction can be increased by using zeolite as catalyst support due to its ability to crack the long chain hydrocarbon. In this research, synthesis of catalyst Co...
Saved in:
| Main Author: | |
|---|---|
| Format: | Final Project |
| Language: | Indonesia |
| Subjects: | |
| Online Access: | https://digilib.itb.ac.id/gdl/view/34665 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Fischer-Tropsch reaction has low selectivity because it produces hydrocarbon of various chain length. The selectivity of Fischer-Tropsch reaction can be increased by using zeolite as catalyst support due to its ability to crack the long chain hydrocarbon. In this research, synthesis of catalyst Co3O4/ZSM-5 was done in two steps. First step was to synthesis ZSM-5 from two different sources of silica which are rice husk ash and Na2SiO3. Rice husk ash or Na2SiO3 were reacted with aqueous solution of Al2(SO4)3as alumina’s source, then TPABr was added as organic template. The molar ratio of SiO2/Al2O3 in the zeolite was varied from
20, 30 to 40. The mixture of reagents then underwent hydrotermal process at 150?C for four days. The precipitations that formed in the hydrothermal process were filtered, washed, dried,
and then calcined at 550?C for six hours followed by characterization using crystal X-Ray
diffraction, scanning electron microscope (SEM) and Brunauer-Emmett-Teller (BET)
surface analyzer method. The difractrograms showed peaks on 2? = 7,94? and 8,01? which are the identified peaks of ZSM-5. SEM analysis indicated the products were nanozeolites ZSM-5 with the size of 0,05–0,11 µ m2 and surface areas of 206,24 m2/g to 349,07 m2/g based on BET surface analyzer method. TheZSM-5was impregnated with Co(NO3)2.6H2O solution, dried and calcined at 400?C for four hours to produce Co3O4/ZSM-5, as the precursor of Fischer-Tropsch catalyst. The difractograms showed peaks on 2? = 23? which is the identified peak of Co3O4. SEM analysis showed block nanozeolites ZSM-5 with the size of
0,3–0,6 µm2. The BET method indicated the Co3O4/ZSM-5 had surface areas of 169,13–
220,64 m2/g. The concentration of cobalt in zeolites were 6,35–8,92% based on Atomic
Absorbtion Spectrophotometry (AAS) analysis
|
|---|