Study of cellulose extraction and cavitation from plant raw materials

Abstract

In this paper cavitation in extraction is studied. It occurs as a result of a decrease in pressure in a fast-flowing fluid to a certain critical value (hydrodynamic cavitation) or as a result of the passage of acoustic waves in the fluid (acoustic cavitation). The gas and vapor bubbles in the liquid increase infinitely and turn into large “cavitation bubbles”. The bubbles are formed by the dissolution of a gas in a liquid and decrease and disappear when the pressure reaches the critical pressure area. As a result, a “cavitation zone” is formed near the body through which the fluid circulates. At the boundary of the zone, the bubbles decrease very rapidly and a hydraulic shock occurs. The combination of such shocks results in a rumbling sound that is always accompanied by cavitation

Theoretical study and mathematical calculations of the pumpkin drying process

“…The activation energy is calculated using the slope of the 𝐼𝑛 𝐷 1/𝑇 plot shown in figure 3. Some activation energies calculated for gourd in the literature are as follows: 50.06 kJ/mol [9] and 34.7 ± 0.073 kJ/ mol [13][14][15][16].…”