I'm currently working on my design project as a final student. I'm having some issues with the energy balance chapter, please if you can, also send me the heat capacity constants for SUCROSE, HEMILCELLULOSE, CELLULOSE, LIGNIN, WATER, ASH, VOLATILES, ETHANOL, GLUCOSE, NaOH, Ca(OH)2. Several chemical engineering handbooks are showing different value.
Thank you
The molar heat (enthalpy) capacity can quite commonly be found expressed as Cp = a + b·T + c·T2 + d·T-2. There are cases where parcels that express the quadratic dependency on T2 and T-2 are comparatively small or jointly tend to compensate each other, so that Cp ≈ a + b·T.
The Cp can be expressed as function of the temperature wich is a sum of a power series, the most of Cp determined, are obtained empirically, so that it can be expressed as function of temperature in whose cases the coefficients work to obtain Cp at any temperature as a prediction.
Many books has tables like this with common substances and their coefficients. This one is from: Cengel, Cimbala, Turner, Fundamentals of thermal fluid science 5th Ed. 2017. And they reffer the table to B. G. Kyle, Chemical and process Thermodynamics 1984.
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