Catalytic Conversion of Syngas into Higher Alcohols over Carbide Catalysts

Abstract

The salt was dried to constant weight at 110 °C. In the calculation of the loading it is assumed that this treatment has removed all water.

Oxygenate formation over K/β-Mo2C catalysts in the Fischer–Tropsch synthesis

“…S4). The focus of the present study is the formation of oxygenates which was reported to be enhanced by potassium promotion [20,22,23,29,37]. Due to the high CO2 selectivities, it is of interest to compare the formation towards oxygenates and hydrocarbons without CO2.…”

“…Prior to the Fischer-Tropsch experiments, the catalyst samples are treated in 50 ml/min/gcat hydrogen at atmospheric pressure and 400°C with a ramp rate of 5°C/min for 4.5 h to reduce the catalyst and to remove the oxide layer formed during the passivation step. This pretreatment is commonly reported in literature [24,29,30]. Exception is made for one in situ prepared non-promoted catalyst, which was not passivated.…”

Effect of carburization protocols on molybdenum carbide synthesis and study on its performance in CO hydrogenation

“…A small amount of alcohols was found in their products at high reaction pressure, while the synthesis of hydrocarbons was restricted and the production of alcohols was promoted by addition of K 2 CO 3 [25]. Afterwards, numerous studies [26][27][28][29][30][31][32] were carried out to obtain a catalyst with high activity and superior alcohol selectivity by adjusting process conditions (pressure, temperature, space velocity, etc.) and promoters (alkali metals, transition metals, supports, etc.).…”

Influence of alkali metal (Li and Cs) addition to Mo2N catalyst for CO hydrogenation to hydrocarbons and oxygenates

“…Higher temperatures are favourable for the formation of HCs as well as CO 2 via a water gas shift reaction on K/Mo 2 C catalysts . The increased CO 2 concentration at steady state alters the CO/H 2 ratio in the reactor zone and influences the CO insertion process followed by higher alcohol formation …”