Question

What is sulfidation temperature + catalyst formation?

Answer 1

Answer:

$When the sulfidation temperature was higher than 400 °C, the catalytic activity decreased with increasing sulfidation temperature. ... The CoMoS(II) formation did not favor the catalytic activity, because the formation of this species resulted in the occurrence of Co9S8 and crystalline MoS2 in catalysts.$

Answer 2

Explanation:

or the sulfidation of unpromoted Mo catalysts, it appears that from room temperature to 423–448 K, an oxysulfide phase is formed by O–S exchange1–3 and the molybdenum is reduced (from VI to IV or V). 1,4–7. During this step, sulfur atoms evolve from a terminal position (S2−) to a bridged position on Mo (S22−).