Function promotion of SO42−/Al2O3–SnO2 catalyst for biodiesel production from sewage sludge

Rongyan Zhang, Fenfen Zhu, Yi Dong, Xuemin Wu, Yihe Sun, Dongrui Zhang, Tao Zhang and Meiling Han

Renewable Energy, 2020, vol. 147, issue P1, 275-283

Abstract: Catalysts are critical materials for biodiesel production using sewage sludge feedstock. In this research, different SO42−/Al2O3–SnO2 catalysts were prepared and characterized. The catalysts prepared at different conditions were characterized through Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), NH3-temperature-programmed desorption (NH3-TPD), NH3 adsorption FT-IR, and TGA. Then, esterification/transesterification reaction was performed with the lipid extracted from sewage sludge to verify the activity of these catalysts. Results showed that the catalysts with n(Al):n(Sn) = 1:10 prepared by 79 wt% H2SO4 possessed the best physical properties with a large number of active catalytic sites, which led to the biodiesel yield of 73.3% (based on dried extracted crude fat) under the optimized reaction conditions at 130 °C as reaction temperature, 0.8 g as catalyst loading for lipids extracted from 10 g freeze-dried sludge, 4 h as reaction time. Catalysts characterization results showed that acidity, acid sites and Al/Sn molar ratio play an important role in the activity of catalysts. The thermal properties showed that 450 °C was the suitable calcination temperature for catalyst preparation. The optimized SO42−/Al2O3–SnO2 catalyst in this research will have a bright future in the field of sludge production of biodiesel.

Keywords: Sewage sludge; SO42−/Al2O3–SnO2; Biodiesel (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S096014811931328X
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:147:y:2020:i:p1:p:275-283

DOI: 10.1016/j.renene.2019.08.141

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().