Production of biodiesel from waste cooking oil using ZnCuO/N-doped graphene nanocomposite as an efficient heterogeneous catalyst

Arabian Journal of Chemistry

Mohammed Rafi Shaik¹  Syed Farooq Adil¹  Abdulrahman Al-Warthan²  Mohamed E. Assal²  Mohammed Rafiq H. Siddiqui²  Mujeeb Khan²  Mufsir Kuniyil³  J.V. Shanmukha Kumar³ 

[1] Corresponding authors.;Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;Department of Chemistry, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur 522502, Andhra Pradesh, India;

关键词: Transesterification;    N-doped graphene;    Waste cooking oil;    Biodiesel;    Nanocomposite;   

DOI  :  

来源: DOAJ

【 摘 要 】

The use of heterogeneous catalyst for biodiesel production can reduce the price of separation process and therefore minimize the biodiesel cost. ZnCuO/N-doped graphene (NDG) catalyst synthesized by facile mechanochemical procedure was tested in the transesterification of waste cooking oil (WCO) with methanol to produce biodiesel. The effects of catalyst loading (0–15 wt%), weight percentage of NDG (10–100%), methanol to oil molar ratio (6:1–18:1), reaction time (2–10 h) and reaction temperature (120–200 °C) were systematically studied at the optimal conditions. Additionally, the properties of the fabricated catalysts were assessed via XRD, FTIR, N2 sorption studies, HRTEM, TGA and Raman spectroscopy. It was found that the ZnCuO/(X%)NDG nanocomposites exhibit enhanced catalytic performance when compared with the ZnCuO catalyst (without NDG) under the identical conditions. The efficacy of the ZnCuO/(X%)NDG nanocomposites has improved owing to the inclusion of NDG in the catalytic system, which in-turn enhanced the properties of the mixed metal oxides (MMO’s) such as surface area, defective sites to a great extent. The ZnCuO/(30%)NDG catalyst displayed a highest catalytic activity towards transesterification of WCO (97.1%) at the optimized conditions of 10 wt% catalyst loading, 15:1 methanol:oil molar ratio, 8 h reaction time and 180 °C reaction temperature. Moreover, the recovered catalyst was successfully reused six cycles with no discernible loss in its activity.

【 授权许可】

Unknown