Drying of instant coffee in a spray dryer

Nur Tantiyani Ali Othman, and Muhammad Elmi Fahmi Mohd Razali, (2019) Drying of instant coffee in a spray dryer. Jurnal Kejuruteraan, 31 (2). pp. 295-301. ISSN 0128-0198


Official URL: http://www.ukm.my/jkukm/volume-312-2019/


Instant coffee is a popular beverage around the world and has been recognized for shorter preparation time and longer shelf life compared to brewed coffee. The production of instant coffee powder through the drying process requires lots of attention to provide the best quality of coffee to the consumer. Most of the instant coffee powder has been produced either by freeze-drying or spray drying. However, the drying spray showed some advantages in case of shorter drying time, ability to handle in a large capacity, and continuous production of coffee powder compared. The objective of this study is to identify the affecting factors in achieving a high quality of coffee production in the drying process. The initial concentration of coffee extract is between 30-42 wt.% were fed by the atomizer. Also, the spray drying chamber with the inlet air temperature of 423.15 K to 573.15 K. The pressure was set at 52 bar to obtain the best drying quality of the coffee production. The simulation results show with the air temperature of 423.15 K, the pressure of 52 bar and the initial extract concentration of 42% are the best conditions of drying coffee using the spray drying method. Also, the velocity distribution flattened as the flow proceeds downstream. As well, the vapour concentration distribution flattened further down the chamber so that the drying air leaving the drying chamber has almost a uniform moisture distribution.

Item Type:Article
Keywords:Instant coffee; Spray dryer; Ansys fluent; Drying; Moisture content; Evaporation rate
Journal:Jurnal Kejuruteraan
ID Code:14823
Deposited By: ms aida -
Deposited On:06 Jul 2020 07:17
Last Modified:10 Jul 2020 03:30

Repository Staff Only: item control page