PERTANIKA JOURNAL OF TROPICAL AGRICULTURAL SCIENCE

 

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Mathematical Modelling of Infra-Red Evaporation Characteristics of Wheat Straw Black Liquor

Surendra Pratap Singh, Mohammad Jawaid, Bhoomika Yadav and Mohd Supian Abu Bakar

Pertanika Journal of Tropical Agricultural Science, Volume 29, Issue 4, October 2021

DOI: https://doi.org/10.47836/pjst.29.4.33

Keywords: Biomass, black liquor, evaporation, viscosity, wheat straw

Published on: 29 October 2021

Infrared (IR) evaporation characteristics of Weak Soda Black Liquor (WSBL) were determined at five different temperatures of 80, 90, 100, 110 and 120oC. The effect of constant temperature on evaporation rate and moisture content (on a dry basis) of 1.5 gm approx. WSBL tests were contemplated and required a careful time frame of IR dissipation to vanish the dampness content at a different consistent temperature. The dissipation rate expanded with expanding infrared temperature. Therefore, different numerical models, such as Page and Logarithmic, Henderson, Pabis and Lewis, were utilised to fit the experimental data properly. A Gaussian model equation was developed for evaporation rate and moisture fraction of black liquor. The probable empirical parameters, along with the relating of reduced chi-square (X2), Residual Sum of Square (RSS), and coefficients of determination (adjusted R2) from non-linear regression analysis of all the numerical model equations, were examined. In addition, the effect of evaporation temperature on the water removal rate, the effective diffusion coefficient and activation energy were also estimated. The effective diffusion coefficient ranges from 2.67 × 10–10 m2/s to 10.4 × 10–10 m2/s, and the activation energy was 39.19 kJ/mol. The statistical indicators (chi-square and determination coefficient) showed that the Decay model equation and Gaussian equation are the most suitable models for describing the evaporation process of WSBL.

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ISSN 1511-3701

e-ISSN 2231-8542

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JST-2633-2021

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