Different catalyst carriers will have different conversion rates for mathane

The carrier of the catalyst used in the autothermal reforming of methane needs to have appropriate crystal phase composition, specific surface area and pore structure.In order to facilitate the adsorption and activation of reactant molecules on the catalyst surface.

At the same time, catalyst carrier is also conducive to the desorption of product molecules to leave the catalyst surface, so as to prevent the occurrence of carbon deposition reaction. In addition, the carrier should also have good mechanical strength.

Studies have shown that the conversion rate of methane varies from 33.4% to 66.9% due to different carriers. Except for SiO2, the selectivity of carbon monoxide of the catalysts supported by other carriers is more than 99%.

Because the acidity and alkalinity of the carrier surface have a great influence on the activity and anti-coking ability of the catalyst, the acidity and alkalinity of the carrier surface should also be considered when selecting a catalyst carrier. It is generally believed that the relatively strong basic center on the surface of the catalyst will help to enhance the anti-coking ability of the catalyst.

       There are great differences among various carriers. Al2O3 can be used as a carrier for CH4 autothermal reforming catalyst due to its suitable specific surface and pore structure, and the reactivity of different types of Al2O3 is also different.

        Using Al2O3 as a carrier not only provides the contact surface between the reactant and the active center of the catalyst, but also Al2O3 interacts with the active component Ni to form a NiA12O4 spinel structure, which has a great impact on the activity of the catalytic reaction and carbon deposition.

         The oxygen storage capacity of the carrier also has an effect on the performance of the methane partial oxidation reaction. The so-called oxygen storage capacity refers to the ability of the carrier to reversibly store and release a large amount of oxygen in accordance with the gas phase concentration. It is generally believed that a carrier with a higher oxygen storage capacity is beneficial to the partial oxidation reaction.