“…Since CO 2 is reported to act mainly as an inert diluent for FTS on cobalt (16,17,19), N 2 was selected as a surrogate. Use of N 2 to model CO 2 is probably not entirely valid, since research has shown that CO 2 may appear to compete with CO for absorption on cobalt (16), but N 2 was the only other gas readily available at the time. On the final day of Test FTR48, the feed was switched to 0.15 slpm H 2 , 0.1 slpm CO, and 0.4 slpm N 2 until the H 2 cylinder ran empty.…”