| Summary: | The separation effect of methane (CH4) and carbon dioxide (CO2) which is binary
mixture of natural gas was investigated with characterization tests, breakthrough study
and pressure swing adsorption (PSA) process. 2 types of adsorbent were studied and
compared which were activated charcoal and zirconium-benzenedicarboxylate (UiO-
66). The characterization tests showed that UiO-66 has higher BET surface area and
activated charcoal has higher fixed carbon content. For breakthrough study, the
breakthrough curves were obtained under the condition of 1 bar and room temperature.
The effects of both adsorbents and different inlet gas ratio were investigated. UiO-66
has larger adsorption capacity proven by its longer breakthrough time. Besides, PSA
process had utilized 2-bed adsorption under the conditions of 3 bar and room
temperature. However, separation effect of this mixture was not effective and
commercially attractive because 2 types of adsorbent used were not suitable for
separating this binary gas. Hence, the purity was not achieved but the recovery could
be obtained because UiO-66 showed more than 90% recovery on CO2.
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