|
| Repetitive performance comparison of supported solid base ascatalyst for biodiesel synthesis |
| |
| DOI： |
| KeyWord:supported solid base catalysis biodiesel repetitive performance |
| FundProject: |
|
| Hits: 1242 |
| Download times: 0 |
| Abstract: |
| The CaO/Mg-Al-O and CaO/Zn-Al-O solid base catalysts were prepared by co-precipitation, impregnation and calcination, and the KF/Mg-Al-O and KF/Ca-Al-O solid base catalysts were prepared by co-precipitation, calcination and grinding. Activation treatment of used catalyst was conducted by alcohol washing, drying and calcination for the next experiment. The effects of repetitive utilization times of catalyst on catalyst activity were investigated with transesterification of castor oil and methanol as a model reaction. The new catalyst and catalyst activated after using were characterized by Hammett indicator titration and XRD technology, and loss of alkali dissolution, precipitated glycerol and total glycerol were measured in the catalytic process. The results showed that the two types of solid base catalysts had good catalytic activity for the first time, and poor catalytic activity for the second time. The base amount of the new catalyst was much higher than that of the used catalyst. The crystal structures of new catalyst and used catalyst had little difference. The new catalyst had larger loss of alkali dissolution, and generated more glycerol. |
| View full text View/Add Comment Download reader |
| Close |
|
|
|
