Slurry for hydrogen oxidation catalyst coating and preparation method of slurry

Abstract

The invention relates to slurry for a hydrogen oxidation catalyst coating and a preparation method of the slurry, mainly solving the problems that in the prior art, the preparation of the slurry costs a long time and the slurry is large in granularity and low in stability, and thus a catalyst is long in production period and high in cost, the abrasive loss rate of the prepared coating is high, and the performance and the stability of the catalyst are low. The slurry for the hydrogen oxidation catalyst coating comprises the following components of water, aluminium sol, aluminium oxide, a coating adjuvant, a pH regulating agent and a foaming agent. The preparation method of the slurry comprises the following steps of: sequentially adding the water, the aluminium sol, the aluminium oxide and the coating adjuvant into a colloid mill, and circulating the mixture; regulating the slurry by the pH regulating agent to obtain slurry I; foaming a certain amount of the foaming agent and water by using a foaming machine; and adding foams into the slurry I to obtain slurry II. By the technical scheme, the problems are solved well; and the slurry and the preparation method thereof can be applied to the industrial production of the catalyst coating slurry.

Description

technical field

[0001] The invention relates to a slurry for hydrogen oxidation catalyst coating and a preparation method thereof. Background technique

[0002] At present, supported catalysts with noble metals as active components are widely used in chemical industry, oil refining and automobile exhaust treatment. The non-uniform distribution of active components in the carrier can reduce the amount of precious metals and increase the utilization rate of precious metals; at the same time, in many reactions, catalysts with non-uniform distribution also show better activity, selectivity and lifetime than catalysts with uniform distribution. In the early days, the effect of non-uniform distribution was often achieved through the control of impregnation, but it was often difficult to control the distribution range of the catalyst. This requires first providing a special carrier, which is composed of an inert core and a coating. Only the coating absorbs metal and the thickness ...

Images