Asian Journal of Research in Chemistry

Minh Duc Ngo ¹, Thi Nhu Mai Tran ², Thi Phuong Ly Giang ³, Ba Trung Nguyen ¹

Affiliations
1 Department of Chemistry, University of Education, The University of Danang, VN
2 Department of Chemistry, Hanoi University of Science, VN
3 Hanoi University of Science and Technology, VN

Abstract

The catalytic system Mgo-γ-Al₂O₃/Tio₂-so₄ ^2- was synthesized, and then characterized by XRD, IR, NH3 - TPD, CO2-TPD, BET, EDX methods. As can be seen from the results of physical characterization, the synthesized Mgo-γ-Al₂O₃/Tio₂-so₄ ^2- material owns a large surface area of 261.85 m²/g, a mean capillary diameter of 95.5 Å. The presence of TiO2 and SO4 2- creates strong acid sites on the catalyst surface, as indicated by the NH3 desorption temperature peak at 509.5°C and 546.6°C. The presence MgO phase creates strong basic sites, as specified by the CO₂ desorption temperature peak at 502.1°C. A transesterification between methanol and waste cooking oil (the volume ratio of methanol to oil of 1:1) using Mgo-γ-Al₂O₃/Tio₂-so₄ ^2- as a catalyst was carried out at 120°C for 4 hours. The reaction efficiency was about 98.1%.

Keywords

Biodiesel synthesis,Mgo-γ-Al₂O₃/Tio₂-so₄ ^2- , Acid-Base catalyst, Mesoporous Material, Transesterification.

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