TITLE: CO+H Sub 2 Reaction over Nitrogen-Modified Iron Catalysts.  Quarterly Technical Progress Report, April 1, 1984-June 30, 1984.

AUTHOR: W. N. Delgass.

INST.  AUTHOR: Purdue Univ., Lafayette, IN.

SPONSOR: Department of Energy, Washington, DC.

LANGUAGE: English

PUB.  TYPE: Technical Report

PUB.  COUNTRY: United States

SOURCE: Department of Energy [DE],  1984,  40p.

NTIS ORDER NO.: DE85000025/INW 

ABSTRACT:

The steady state Fischer-Tropsch behavior over the iron nitrides at 523 and 450 exp 0 K was compared to the kinetics over iron at similar conditions. At 523 exp 0 K, 3/1 H sub 2 /CO at atmospheric pressure, the epsilon and zeta nitrides give higher olefin to paraffin ratios and CO sub 2 activities than iron and the gamma ' nitride. At 458 exp 0 K the high olefin to paraffin yield of the higher nitrides is preserved after an induction period. Detailed Moessbauer analysis of the catalysts used at 458 exp 0 K showed < 20% incorporation of carbon and allows structural interpretation of carbon movement into, and nitrogen removal from, the nitride lattice. Quantitative analysis of the NH/sub x/D/sub 3-x/ species leaving a fresh nitride surface after a switch to D sub 2 yields NH as the average composition of the surface nitrogen-containing species. 16 references, 6 figures, 3 tables. (ERA citation 10:002048)

REPORT  NUMBER: DOE/PC/50804-7

CONTRACT  NUMBER: FG22-82PC50804