Due to the importance of gas mixture composition in CO separation process and the lack of sufficient studies in the literatures for SSZ-13 zeolite membrane, in this paper, the effect of various mixed gas compositions was investigated in CO separation from light gases like CH, N, and H by using a synthesized SSZ-13 zeolite membrane. Single gas permeance was measured for CO, N, CH and H in a wide range of temperature (30-80 °C), feed pressure (up to 600 kPa) and different feed composition for gas mixtures (25:75, 50:50, 75:25). The results of single gas showed really good performance, i.e., CO permeance of 7.34 × 10 mol m s Pa and CO/CH selectivity of 60 at 30 °C and 200 kPa of feed pressure. For equimolar mixed gas, the CO permeance was almost the same for single gas while the CH permeance was reduced by 75% and hence CO/CH selectivity was increased by three times, i.e., from 60 to 183. Similarly, the selectivity of CO/N and CO/H were doubled and increased by more than 5 times, respectively. For other compositions (25:75, 75:25) the CO/CH, CO/N and CO/H mixture selectivity were decreased with increase in CO concentration of feed keeping always higher gas selectivity than the single gas tests.
CO2 separation from binary mixtures of CH4, N2, and H2 by using SSZ-13 zeolite membrane
A Brunetti;G Barbieri
2021
Abstract
Due to the importance of gas mixture composition in CO separation process and the lack of sufficient studies in the literatures for SSZ-13 zeolite membrane, in this paper, the effect of various mixed gas compositions was investigated in CO separation from light gases like CH, N, and H by using a synthesized SSZ-13 zeolite membrane. Single gas permeance was measured for CO, N, CH and H in a wide range of temperature (30-80 °C), feed pressure (up to 600 kPa) and different feed composition for gas mixtures (25:75, 50:50, 75:25). The results of single gas showed really good performance, i.e., CO permeance of 7.34 × 10 mol m s Pa and CO/CH selectivity of 60 at 30 °C and 200 kPa of feed pressure. For equimolar mixed gas, the CO permeance was almost the same for single gas while the CH permeance was reduced by 75% and hence CO/CH selectivity was increased by three times, i.e., from 60 to 183. Similarly, the selectivity of CO/N and CO/H were doubled and increased by more than 5 times, respectively. For other compositions (25:75, 75:25) the CO/CH, CO/N and CO/H mixture selectivity were decreased with increase in CO concentration of feed keeping always higher gas selectivity than the single gas tests.File | Dimensione | Formato | |
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Descrizione: CO2 separation from binary mixtures of CH4, N2, and H2 by using SSZ-13 zeolite membrane
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