Tổng hợp methyl ester từ dầu ăn phế thải hướng tới ứng dụng làm chất lỏng cách điện máy biến áp

Bài viết Tổng hợp methyl ester từ dầu ăn phế thải hướng tới ứng dụng làm chất lỏng cách điện máy biến áp đánh giá tính khả thi của việc sử dụng methyl ester được điều chế từ dầu ăn phế thải để cách điện trong máy biến áp phân phối. Methyl ester được sản xuất bằng phản ứng transesterification giữa dầu ăn phế thải và methanol với chất xúc tác là sodium hydroxide. | VNU Journal of Science Natural Sciences and Technology Vol. 39 No. 2 2023 76-82 Original Article Synthesis of Methyl Ester from Waste Cooking Oil Toward Application in Transformer s Insulating Liquid Nguyen Van Dung Nguyen Thi Xuan Thi Le Vinh Truong Can Tho University 3 2 Can Tho Vietnam Received 15 September 2022 Revised 11 January 2023 Accepted 21 March 2023 Abstract This study evaluated the feasibility of using methyl ester prepared from waste cooking oil for electrical insulation in distribution transformers. Methyl ester is produced by a transesterification reaction between waste cooking oil and methanol using sodium hydroxide as a catalyst. The physicochemical parameters and breakdown voltage of the methyl ester were determined. The effects of aging on the breakdown voltage viscosity and acid value of methyl ester were also investigated. In addition the breakdown voltage of Kraft paper impregnated with methyl ester was determined. Experimental results showed that methyl ester from waste cooking oil had low viscosity cSt and high breakdown voltage kV . Other parameters also meet ASTM D6871 except for the pour and flash points. Aging insignificantly affected the breakdown voltage of the methyl ester. After aging the breakdown voltage of the methyl ester increased to kV. However the viscosity of the methyl ester also increased by and the acid value increased by times. Finally the breakdown voltage of Kraft paper impregnated with the methyl ester was about 5-10 lower than that of paper impregnated with the mineral oil. Keywords Methyl ester waste cooking oil insulating liquid transformers. D _ Corresponding author. E-mail address nvdung@ https 2588-1140 76 N. V. Dung et al. VNU Journal of Science Natural Sciences and Technology Vol. 39 No. 2 2023 76-82 77 Tổng hợp methyl ester từ dầu ăn phế thải hướng tới ứng dụng làm chất lỏng cách điện máy biến áp Nguyễn Văn Dũng Nguyễn Thị Xuân Thi Lê Vĩnh .