Synthesis of mesoporous sulfated zirconia nanoparticles with high surface area and their applies for biodiesel production as effective catalysts.
In: Catalysis Today, Jg. 298 (2017-12-01), S. 99-108
academicJournal
Zugriff:
Sulfated zirconia (SZ) was employed as solid acid catalyst for biodiesel production via the transesterification of soybean oil with methanol. The effects of synthesis method, template/sulfonating agent and calcination temperature were investigated. Compared to conventional two-step route, one-step liquid-crystal template (LCT) method achieved the successful synthesis of mesoporous SZ nanoparticles (MNSZ) with larger surface area, favored the more acid sites, stronger acidity and smaller tetragonal ZrO 2 (t-ZrO 2 ). Sodium dodecyl sulfate (SDS), both as template/sulfonating agent, was superior to Hexadecylsulfonic acid sodium salt (CSS) in retarding the grain growth of t-ZrO 2 , formation of monoclinic ZrO 2 phase and loss of sulfated groups. High calcination temperature resulted in the serious loss of acid sites, decrease of surface area and increase in crystal size of t-ZrO 2 , accelerated the transformation of active t-ZrO 2 into monoclinic ZrO 2 , thus leaded to severe decline in catalytic activity. MNSZ, prepared via one-step LCT method at 550 °C using SDS as template/sulfonating agent, was found to be the best catalyst. Over this catalyst of 4 wt%, approximately 100% of soybean oil conversion and FAME yield of 94.9% could be achieved at 120 °C in 4 h, using the feedstock with methanol/soybean oil molar ratio of 12:1. [ABSTRACT FROM AUTHOR]
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Synthesis of mesoporous sulfated zirconia nanoparticles with high surface area and their applies for biodiesel production as effective catalysts.
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Autor/in / Beteiligte Person: | Luo, Yongming ; Han, Caiyun ; He, Sufang ; Mei, Zhanqiang ; Liu, Nengsheng ; Wang, Hua |
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Zeitschrift: | Catalysis Today, Jg. 298 (2017-12-01), S. 99-108 |
Veröffentlichung: | 2017 |
Medientyp: | academicJournal |
ISSN: | 0920-5861 (print) |
DOI: | 10.1016/j.cattod.2017.05.047 |
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