TY - JOUR ID - 56091 TI - Removal of impurities from waste oil by combination of Eggshell and Eggshell's active carbon for biodiesel production JO - Journal of Advances in Environmental Health Research JA - JAEHR LA - en SN - 2676-3478 AU - Didar, Zohreh AD - Young Researchers and Elite Club, Neyshabur Branch, Islamic Azad University, Neyshabur, Iran Y1 - 2017 PY - 2017 VL - 5 IS - 3 SP - 123 EP - 130 KW - Waste oil KW - Eggshell KW - Active carbon KW - Biodiesel DO - 10.22102/jaehr.2017.74840.1007 N2 - Waste oil is an inexpensive source for biodiesel production, but the high amount of impurities present (free fatty acids, oxidation products) impedes its practical application. The aim of this work is to assess the purification efficiency of the adsorption process with eggshell and its active carbon. Carbonization of eggshell was done at 200 ºC for 4 hours. For activation of the resultant carbon, sulfuric acid was used, and finally, thermal activation (600 ºC, 1 hour) was performed. The quality parameters of waste oil (free fatty acid, peroxide value, color indices, viscosity, and density) were determined before and after the adsorption process. The results showed an improvement pattern in the measured parameters after the adsorption. Reduction in peroxide and acid value were 71.7% and 51.72%, respectively. Also, produced biodiesel from treated waste oil has better quality indices including acidity, viscosity and specific gravity. Biodiesel yield also increased up to 40 percent. UR - https://jaehr.muk.ac.ir/article_56091.html L1 - https://jaehr.muk.ac.ir/article_56091_a761f7e7bb9af835f31647d72ea000c2.pdf ER -