AI Article Synopsis
- The study tested hollow polyimide fibers in membrane modules for their efficiency in separating carbon monoxide (CO) and methane (CH) during natural gas processing.
- The researchers examined the effects of natural contaminants like hydrogen sulfide, dodecane, and BTX on the membranes' gas permeability and separation selectivity.
- Findings revealed that even small amounts of impurities significantly impacted gas permeability, with their effects on CO/CH selectivity being complex and varying based on specific conditions.
Article Abstract
In this study, hollow fibers of commercial polyimide were arranged into membrane modules to test their capacity and performance towards natural gas processing. Particularly, the membranes were characterized for CO/CH separation with and without exposure to some naturally occurring contaminants of natural gases, namely hydrogen sulfide, dodecane, and the mixture of aromatic hydrocarbons (benzene, toluene, xylene), referred to as BTX. Gas permeation experiments were conducted to assess the changes in the permeability of CO and CH and related separation selectivity. Compared to the properties determined for the pristine polyimide membranes, all the above pollutants (depending on their concentrations and the ensured contact time with the membrane) affected the permeability of gases, while the impact of various exposures on CO/CH selectivity seemed to be complex and case-specific. Overall, it was found that the minor impurities in the natural gas could have a notable influence and should therefore be considered from an operational stability viewpoint of the membrane separation process.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7692088 | PMC |
| http://dx.doi.org/10.3390/membranes10110324 | DOI Listing |
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