Die Reduktion von N0x (N02 oder NO + N02) mit NH3 an einem Fe‐oxid/Ti‐oxid‐Katalysator wird in einem Strömungsreaktor untersucht.

No abstract

The equilibrium constants, enthalpy, and entropy of the reversible binding of nitrogen oxide to Fe(II)edta in an aqueous solution have been measured in the temperature range 38.5 to 70 °C. Experiments were carried out by absorbing NO under O2 free conditions. The results show that, in the absorption of NO with Fe(II)edta solution, the value of ΔH° is −15.8 kcal/mol and ΔS° is −20.7 e.u.

The present study was directed towards investigating the relationship between the acid absorption of the catalyst layer and electrode performance and discussing the pores available for the cathode and anode reactions. The catalyst layer was formed on a porous carbon substrate by spreading a slurry consisting of a carbon‐supported platinum catalyst and PTFE dispersion. The nonionic surfactant contained in the dispersion enhances the acid absorption. Pores from 0.2 to 10 μm in diameter are available for the reactions.

A mixed oxide of Mo03 and Ti02 has been found to adsorb hydrogen sulfide and to be regenerated easily by an oxidative desorption process. The adsorbent takes up nearly one mole of H2S per mole of Mo03 according to the following two reactions: H2S + Mo03 = Mo03*SH2 and + Mo03 = Mo02-S + H20. The oxidative desorption is performed by introducing an oxygen-containing gas through the adsorbent bed. The desorbed gas contains S02 as well as a small amount of elemental sulfur. A cyclic test was carried out to examine the regenerability of the adsorbent, and it was found that the adsorption capacity decreased slightly in the first 10 cycles but remained constant in 10-25 cycles.