Water Removal from an Ethanol-Water Mixture at Azeotropic Condition by Adsorption Technique

Abstract

The separation of ethanol-water mixture is employed in the present work to produce pure ethanol, the present investigation on the separation of water from the ethanol to achieve pure ethanol by adsorption process. The different parameters like quantity of adsorbent, flow rate of feed mixture, and different adsorbents which are zeolite 3A, zeolite 4A, and silica gel are selected to study purification of ethanol by adsorption. The effect of process parameter for purification is also recorded and studied to evaluate the performance of adsorption equipment and adsorbent. The experiments are conducted at 30°C. The feed mixture is 95.6% (v/v) concentration of ethanol and 4.4% (v/v) of water. The designed adsorption column is suitable for purification of ethanol. The highest ethanol concentration 99.9443% obtained at 20 ml/min flow rate of feed mixture using 50 g of zeolite.

Green Synthesis of Surface Modified Biochar for Simultaneous Removal of Steroidal Hormones and Heavy Metals from Wastewater: Optimisation by Central Composite Design

“…When comparing the first and fifth cycles, the adsorption ability of BMB500 only dropped significantly below 60% after the fourth cycle. The decrease in the adsorption capacity of the BMB500 after each desorption experiment can be ascribed to the loss of functional groups on the BMB500's surface [46]. The result of these experimental findings showed that the adsorbent (BMB500) had good regeneration efficiency for the first four cycles and could be successfully re-used four times.…”

“…In each cycle of the adsorption-desorption test, the recycled ball-milled biochar was added to 25 mL of 2 mg/L mixed solutions of the steroidal hormones. The adsorption process was then repeated five times to assess the efficiency of the regenerated ball-milled biochar [46,47].…”

Potential of Corn Cob Sustainable Valorization to Fuel-Grade Bioethanol: A Simulation Study Using Superpro Designer®

“…The sensitivity of columns in PSD is presented in Figure 5. Results imply that more stages in the 1 st distillation column lead to the asymptotic condition of bioethanol concentration at approximately 96% due to the azeotropic phenomenon 35) . Likewise, the greater actual stages in the 2 nd column reflect the intensive cost that should be required to rectify bioethanol from 96% to 99.96%.…”

“…Nevertheless, it is still rarely communicated as nowadays only contains a total of 49 documents, as seen in Figure 1. The aforementioned list of studies is dominant in experimental mode focusing on hydrolysis, fermentation, or ethanol distillation separately [32][33][34][35] . Thus, a more specialized and integrated simulation study in corn cob sustainable valorization by fermentation using Zymomonas mobilis to produce bioethanol is believed to fill the gap and contribute to science and technology communities.…”

Purification of Ethanol by Continuous Adsorption Method Using Zeolite 3a and Calcium Oxide

“…In this research, zeolite 3A and calcium oxide were used as adsorbents because both adsorbents were effective in producing fuel-grade ethanol. Based on the research of Mekala et al (2022), Zeolite 3A is a better adsorbent and is also effective for absorbing water in an ethanolwater mixture under azeotropic conditions when compared to zeolite 4A. The highest concentration obtained was 99.9443% using zeolite 3A as adsorbent.…”