Teknologi Hemat Energi Untuk Produksi

Abstract

The aim of this study is to calculate energy consumption at ectractive distillation process with salts and solvent mixture as entrainer to produce fuel grade alcohol (>99.8%w). This process used two column, the main exctractive column and the recovery column. A substantial reduction in the energy consumption, compared with conventional process, was predicted by using ethylene glycol and salts is NaCl, K 2 CO 3 and CaCl 2 2 CO 3 : 0.05 g/ml or CaCl 2 Key words : fuel grade alcohol, extractive distillation, solvent mixture 0.75 g/ml or NaCl : 0.13 g/ml, at reflux ratio 1.5. as entrainer. Solvent and feed volum ratio (S/F) are varied in the range 0.3 – 1.4 , concentration salts in solvent are varied in the range 0.03 – 0.55 g salt / ml solvent and reflux ratio 0.5 – 2.5. The results show that high S/F ratios increase the energy consumption, temperature of the solvent has important effect on distillate composition and energy consumption, this effect depends on the reflux ratio. Effect of salts show that when salts concentration increases, distillate composition and energy consumption also increase. For distillate composition > 99.8%w, the lower energy consumption Q = 821 KJ/kg and number of stage 36 (35% lower than conventional process) reached in S/F ratio 0.9, K