PENGARUH VOLUME BERAT ADSORBEN DAUN BAMBU DALAM PROSES ADSORPSI TERHADAP KUALITAS PEMURNIAN GLISEROL DARI HASIL SAMPING BIODIESEL BIJI KARET (Hevea Brasiliensis)

Abstract

Glycerol is produced in large quantities as a waste or by-product of biodiesel production through the transesterification process. The level of purity of glycerol is still low because it contains a lot of impurities and its use is very limited if no purification process is carried out. Thus, purification of glycerol is necessary to remove impurities. This study aims to determine the best condition of the weight percent (wt) of the adsorbent to produce the highest levels of glycerol purity. Crude glycerol was first acidified with hydrochloric acid (HCl) at 70℃ for 1 hour with a mole ratio (n/n) of acid added 1:1. Then proceed with adsorption using adsorbents from bamboo leaves which have been calcined at 600℃ for 2 hours with a ratio of weight percent (% wt) of adsorbent added 12%, 14%, 16%, 18% and 20%. Crude Glycerol and purified glycerol were analyzed for glycerol content, moisture content, ash content, density, and MONG content.Crude glycerol used has a glycerol content of 35.86%. After carrying out a series of purification processes, the optimum conditions were obtained at a weight ratio (%wt) of adsorbent of 20% which xi produced the highest purity with a glycerol content of 52.23%, water content of 21.9%, ash content of 0.064%, density of 1.253 gr/ml , and MONG (Matter Organic Non Glycerol) content of 25.804%

 Keywords: crude glycerol, acidified, adsorbent bamboo leaves, adsorption.