Kajian Termodinamika Biogas Berbahan Dasar Kotoran Sapi Luqman Budi Wicaksono, Ahmad Marzuki

Abstract

Thermodynamics study on the process of liquid biogas is needed. The aim is to get information about: compressibility, expansivity, state equation, and biogas critical point. Research was done by taking compressibility and expansivity data. The data of compressibility is gained through the changing of volume when biogas is given a big pressure. The data of expansivity is gained through the changing of volume at higher temperature. The result of the experiment shows the value of compressibility is -1.9 × 10^-5 m³ /cmHg and the value of expansivity is 7.3 × 10^-2 m³ /K. The biogas state equation is ln AV/V = 7.3 × 10^-2 m³ /K (T - T₀ ) + 1.9 × 10^-5 m³ /cmHg (P - P₀ ).