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Preparation and characterization of mixed rare earth hydroxideby co- precipitation method |
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| รหัสดีโอไอ | |
| Creator | 1. Wilasinee Kingkam 2. Sathita Ratnon 3. Saranphon Boonruang 4. Winyu Chitsamphandhvej 5. Vichai Puripunyavanich 6. Sasikarn Nuchdang 7. Dussadee Rattanapha |
| Title | Preparation and characterization of mixed rare earth hydroxideby co- precipitation method |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2021 |
| Journal Title | Songklanakarin Journal of Science an Technology (SJST) |
| Journal Vol. | 43 |
| Journal No. | 6 |
| Page no. | 1751-1755 |
| Keyword | mixed rare earth hydroxide, co-precipitation, catalyst, characterization, biodiesel |
| URL Website | https://rdo.psu.ac.th/sjst/index.php |
| ISSN | 0125-3395 |
| Abstract | The aim of this research was to determine the optimum parameters for synthesis and characterization of mixed rareearth hydroxide (for use as a catalyst) through co-precipitation, with sodium hydroxide as precipitation agent at pH 12. Theeffects of precipitation temperature (30 ,60 or 100 oC) and stirring speed (400 or 600 rpm) on the chemical composition, crystalstructure and surface characteristics of the catalyst were investigated. The chemical composition of the catalyst was analyzedusing X-ray fluorescence (XRF), and it was composed of CeO2, Nd2O3, La2O3, and Y2O3. X-ray diffraction (XRD) studiesindicated that all samples had cubic structure of CeO2. The optimal temperature and stirring speed for precipitation of mixed rareearth catalyst were 60 oC and 400 rpm, respectively, giving large specific surface after calcination at 300 oC. The high 190 m2 g-1BET surface area and 1220 ๏ญmol g-1total basic sites were achieved, indicating small crystallite sizes and large amount of activesites in the catalyst. From the above results, the optimized catalyst is considered a promising solid catalyst for biodieselproduction. |
