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Study of bio-diesel production
Kovač Kralj, Anita
Bio-diesel is a clean burning alternative fuel, produced from domestic, renewable resources. Bio-diesel can be blended at any level with petroleum diesel to create a bio-diesel blend. It can be used ...in compression-ignition (diesel) engines with little or no modification. Bio-diesel is simple to use, biodegradable, non-toxic, and essentially free of sulphur and aromatics. This paper studies the analysing of water inhibitors during the base transesterification catalyst reaction of bio-diesel production. The differently concentrated reactions took place at 28 C temperature (500 mL water + 120 mL methanol, 100 mL water + 120 mL methanol and 50 mL water + 120 mL methanol). Concentration calculations were determined by titration, sensitivity, and by measuring conductivity. The conductivity measurements were based at a strong electrolyte, in our case sodium hydroxide. Methoxide (MeO-) was produced from sodium hydroxide (NaOH) and methanol (MeOH) in a batch reactor. In bio-diesel production, methoxide is incorrectly referred to as the product of mixing methanol and sodium hydroxide: NaOH + MeOH -> H2O + Na+ + MeO-. The reaction with lower water took place at the highest and quickest degree of conversions. The water was effective as an inhibitor. The model for esterification of fatty acids was studying by using the simulator ASPEN PLUS. The mass balance for existing plant of 8,9 t/h bio-diesel was made. When 1 t/h methanol is reacted with triglyceride 8,9 t/h of bio-diesel is produced. Only 99 % pure methanol shall be used.
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