Simulation and assessment of upgrading biogas into biomethane by employing membranes

Membrane gas-gas separation is a prosperous method in upgrading biogas into biomethane and an analytical trans-membrane flow model is embedded in MATLAB® software to simulate and evaluate the results of a single-stage membrane module with utilization pathway. Asymmetric polysulfone hollow fiber membrane with counter-current flow pattern is selected among alternatives due to its qualities. Optimum process parameters in separation are examined for fixed 98% CH4 purity to reach natural gas standards, while assuming permeability and temperature are constant. With the simulation of overall plant combined with compressor and prime mover, total production of an upgrading facility is analysed and best process conditions are obtained. Biomethane and electrical power is produced at the same time and the amount of each product is highly dependent on economical analysis.