Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Information categories investigated in the present study.
| # | Category | # | Category | # | Category |
|---|---|---|---|---|---|
| 1 | Institution | 6 | Feed composition | 11 | Separated gases |
| 2 | Country | 7 | Selectivity or separation factor | 12 | Type of material |
| 3 | Journal | 8 | Permeability | 13 | Metal carrier |
| 4 | Year of publication | 9 | Operation temperature/°C | 14 | Layout |
| 5 | Number of citations | 10 | Operation pressure/bar | 15 | Lifetime |
