Effect of Hydrogen Addition on Coke Formation and Product Distribution in Catalytic Coupling of Methane.

The effect of hydrogen addition on catalytic nonoxidative coupling of methane at 1000 °C was investigated. Experiments were performed at varying ratios between the catalyst and the postcatalytic volume to discern the effect of hydrogen on the catalytic reaction as well as on the gas-phase reaction. Adding 10% H decreases the methane conversion by a factor of 2, almost independent of the ratio between the catalyst and the postcatalytic residence time.

Technoeconomic Evaluation of the Industrial Implementation of Catalytic Direct Nonoxidative Methane Coupling.

This paper presents a process design for catalytic nonoxidative natural gas conversion to olefins and aromatics, highlighting the opportunities and challenges concerning industrial implementation. The optimal reactor conditions are 5 bar and 1000 °C. Heat exchange over the reactor is challenging due to the high temperature and low gas pressure.

Effect of ethane and ethylene on catalytic non oxidative coupling of methane.

The effect of addition of ethane and ethylene (C) on methane coupling at 1000 °C was investigated. A Fe/SiO catalyst was used to determine the contributions of catalytic as well as C initiated methane activation. The catalyst load as well as the residence times at 1000 °C downstream of the catalyst bed were varied.

Competitive Adsorption of Nitrite and Hydrogen on Palladium during Nitrite Hydrogenation.

Nitrite hydrogenation is studied in steady-state as well as transient operation using a Pd catalyst in a tubular membrane contactor reactor. A negative reaction order in hydrogen in steady state operation proofs that hydrogen and nitrite adsorb competitively. In transient operation, feeding nitrite to the Pd surface fully covered with hydrogen results initially in very low conversion of nitrite, speeding up once hydrogen is removed from part of the Pd surface.