초록 ▼

A process for separating and recovering carbonic acid gas from a methane-rich gas containing the same by a pressure swing means comprising contacting the methane-rich gas with an adsorbent for carbonic acid gas at a high pressure to obtain a refined methane gas and then desorbing the carbonic acid f

A process for separating and recovering carbonic acid gas from a methane-rich gas containing the same by a pressure swing means comprising contacting the methane-rich gas with an adsorbent for carbonic acid gas at a high pressure to obtain a refined methane gas and then desorbing the carbonic acid from the carbonic acid gas-adsorbed adsorbent at a low pressure to obtain a substantially pure carbonic acid gas.

대표청구항 ▼

A process for separating and recovering carbonic acid gas from a methane-rich gas containing carbonic acid gas, comprising the steps of adsorbing said carbonic acid gas from said methane-rich gas with a carbon molecular sieve having a nominal pore size of 3.0-4.0 Åas the adsorbent at a high pressure

A process for separating and recovering carbonic acid gas from a methane-rich gas containing carbonic acid gas, comprising the steps of adsorbing said carbonic acid gas from said methane-rich gas with a carbon molecular sieve having a nominal pore size of 3.0-4.0 Åas the adsorbent at a high pressure to obtain a refined methane gas, then desorbing said carbonic acid gas from the carbonic acid gas-adsorbed adsorbent at a low pressure, said methane-rich gas being maintained at a temperature up to 50°C. during said adsorption and desorption steps, and recycling an initial portion of the deadsorbed gas to the step of adsorption, thereby increasing the rate of recovery of said refined methane gas, and simultaneously enhancing the purity of the deadsorbed carbonic acid gas, so as to obtain a substantially pure carbonic acid gas.