RU2001676C1 - Catalyst for gas cleaning from sulfur-containing compounds - Google Patents

Abstract

SUMMARY OF THE INVENTION Product is a composition catalyst. % nickel 0.7 - 0.8, carbon 13 - 18, pyrolyzed grape seeds - the rest The catalyst is obtained by impregnating grape seed nickel with a solution of nickel, drying and treating it at high temperature with hydrocarbon vapors, followed by exposure and cooling in an inert gas stream Characterization increased adsorption catalytic activity 1 tabp

Description

The invention relates to the field of chemical technology and can be used in the chemical, oil and metallurgical industries.

A known catalyst for the purification of gases from hydrogen sulfide, having the following composition, wt.%:

Nickel 2-4

Carbon 10-40

Silica gel

The disadvantages of this catalyst include the complexity of the preparation of the catalyst, its relatively high cost, during the operation of the catalyst, hydrogen sulfide is converted to sulfur dioxide, which practically does not solve the problem of utilizing this impurity, since there is a need to capture sulfur dioxide.

The technical result achieved is a significant reduction in the cost of the catalyst through the use of another carrier, pyrolyzed grape seed, which is a waste product, and an increase in its activity.

To achieve this result, a catalyzer for purifying gases from sulfur-containing compounds, including nickel, carbon and a carrier, contains pyrolyzed grape seeds as a carrier in the following ratio, wt.%:

Nickel 0.7-0.8

Carbon 13-18

Pyrolyzed grape seed. The rest of the Catalyst is prepared by applying an aqueous solution of a metal salt or mixtures of a metal salt on a carrier and then drying. The reduction of nickel, which is part of the composition of the catalyst, is carried out by hydrocarbons, which are extracted from the organic mass of grape seeds due to their heat treatment.

At the same time, the microporous structure of the support is formed, the supported nickel salt is dispersed, and finely dispersed nickel particles are restored.

Under these conditions, the formation of the porous structure of the carrier occurs, and the ratio between small and large pores varies depending on temperature, heating rate and exposure time under certain conditions.

At the same time, the starting nickel salt decomposes into nickel oxides, which

are reduced to metal with the simultaneous formation of water and carbon deposits.

The latter reaction is accompanied by

by dispersing nickel, the degree of dispersion being determined both by the amount of initial nickel and the resulting carbon deposits, and by the temperature regime of heat treatment.

Grape seeds are a waste of grape processing in various technological processes and are not used further.

Catalyst Preparation Example

Grape grains are placed in a rotary reactor and a 2.5% solution of Ni (N03) 2 (100 g of grape seed and 98 g of solution) is poured. After impregnation of the seeds with nickel salts, the reactor is heated and

during rotation, excess water is distilled off, then the grains are dried at a temperature of 105 ° C for 5 hours, at a temperature of 200 ° C for 3 hours. Next, the temperature of the reactor is reduced to room temperature,

the grains impregnated with nickel nitrate are transferred to a quartz reactor and within 3 hours the temperature is raised to 550 ° C in a stream of n-hexane mixed with helium (Н-СеН Не 1:20) and maintained under these conditions for

4 h, then cooled to room temperature in a stream of gels.

The resulting catalyst has a composition, wt.%:

Nickel 0.8

Carbon18

Pyrolyzed grape seed Else In comparison with the prototype, the proposed catalyst has the following advantages.

As a carrier use production waste - grape seeds.

Hydrocarbons contained in the grape seeds, during the reduction of the supported alumina nickel, form ultrafine active carbon along with the feed of n-hexane.

In the process of heat treatment of grape seed with a coated layer, a microporous structure is formed with increased adsorption and catalytic activity.

Other examples are tabulated.

(56) Copyright certificate of the USSR N; 1304860, cl. Howl 53/02. 1985.

Characterization of the catalytic activity of the catalyst

 - Pyrolyzed grape seed

 - Test conditions: V 5600, t 20 ° C, t 24 hours

Claims (1)

The claims Catalyst for the purification of gases from sulfur-containing compounds, including nickel, carbon and a carrier, characterized in that the catalyst contains pyrolyzed as a carrier grape seed in the following ratio of components, wt.%: Nickel 0.7 - 0.8 Carbon 13-18 Pyrolyzed grape seed