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H Study on Deacidification of Plum Wine Using Ion-exchange Resin

Author: GaoMin
Tutor: ZengXinAn
School: South China University of Technology
Course: Sugar works
Keywords: Plum wine Ion exchange Citric acid Deacidification Mechanism
CLC: TS262.7
Type: Master's thesis
Year: 2010
Downloads: 125
Quote: 0
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Abstract


Rich in organic acids in plum wine, far more than the general fruit wine, the highest citric acid content, reach 26.8g / L, followed by malic acid content of 5.3 g / L, and tartaric acid content is very small. Ome the main aroma components of the juice is styrene, acetophenone, 1 - hexanol, etc., while the main aroma substance soaked greengage is ethyl acetate, isobutyl alcohol, isoamyl alcohol, benzaldehyde, benzoic acid ethyl esters. The effects of different ion exchange resin acid lowering effect of the plum wine adsorption, the results show that the D314 resin drop acid works best. The study shows that the static adsorption experiments of each factor: total acid adsorption rate is increased with increasing the amount of resin, when the greengage and the resin used in a proportion of 10:1, will receive about 50% of the deacidification, adsorption the increase amount increases as the adsorption time increases exchange, adsorption time of 150 minutes, the exchange adsorption reached equilibrium state, high-temperature conducive to adsorption of the exchange reaction is carried. The results show that the dynamic adsorption experiments Factors Influencing: low flow and high temperature are conducive to the resin column adsorption greater impact on the total acid adsorption, flow, temperature less affected, considering the energy loss in the process of industrial production and high temperature processing conditions to deal with the impact of the quality of the wine, the choice of column: flow rate 2BV / h, room temperature processing. The citric and malic acid in the D314 resin adsorption exchange amount is increased with the increase of the initial concentration, the the the Freundlich model equation can accurately reflect the citric acid and malic acid adsorption exchange process. By the calculated values ??of thermodynamic functions? S? H and? G shows that citric acid and malic acid on D314 resin adsorption process is spontaneous process (? G lt; 0), and accompanied by endothermic (? H gt; 0), the adsorption entropy becomes positive (? S gt; 0). The resin the citrate adsorption process freedom can? G is smaller than the process free of malic acid adsorption capacity, the adsorption process is more favorable for citric acid. Citric acid and malic acid adsorption enthalpy values ??are positive, but the enthalpy change values ??were less than 8kJ/mol, temperature resin adsorption behavior of citric acid and malic acid. Citric acid and malic acid adsorption exchange process are in line with the two adsorption exchange kinetics of the process, the master step is controlled by particle diffusion, the apparent activation energy were 10.429kJ/mol and 20.117kJ/mol citric easier adsorption deacidification of plum wine is more beneficial. Visits D314 ion exchange resin adsorption plum wine aroma. 94% resin adsorption of furfural adsorption of other aroma components is very small, and thus improve the quality of plum wine. The plum wine sensory evaluation of ion exchange and chemical methods drop acid, derived ion exchange method to drop acid more effective than chemical deacidification method, and a better role in maintaining the aroma of plum wine.

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CLC: > Industrial Technology > Light industry,handicrafts > Food Industry > Brewing industry > A variety of wine and its manufacturing > Wine, liqueur
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