Study of Hydrate-Based Methane Separation from Coal-Bed Methane in Scale-up Equipment with Bubbling

Abstract

In this work, orthogonal-test are introduced in small apparatus SHD-I with stirring and amplification experiments are carried out using scale-up equipment SHW-II with bubbling for hydrate-based CH4 separation from coal-bed methane gas. The optimal condition including 150ml THF-SDS solution, 1.50MPa and 277.15K are determined by orthogonal-test. Under the condition of 277.15K and 1.50MPa, the gas uptake with SHW-II is 165-fold enlarged comparing with that obtained in SHD-1. However, the amount of gas uptake per mole water, CH4 concentration in the residual gas phase and CH4 split fraction are nearly identical. It is testified that the scale-up equipment with bubbling is feasible as the enlargement equipment for CH4 recovery via hydrate-based separation method.