Regenerated flue gas dechlorinating agent and preparation method thereof

Abstract

The invention belongs to the technical field of dechlorinating agents, and relates to a regenerated flue gas dechlorinating agent and a preparation method thereof, the dechlorinating agent comprises the following components by mass: 20%-30% of a carrier, 50%-60% of an active component, 10%-25% of an auxiliary agent, 0.5%-1.5% of an inert separant, and 1%-10% of a pore forming agent; the sum of the mass percentages of the components is 100%. According to the prepared regenerated flue gas dechlorinating agent, the modified molecular sieve is adopted as a carrier, the rich pore channel structure of the molecular sieve is optimized, the pore volume and the specific surface area are increased, the surface acidity of the molecular sieve is enhanced, and the combination degree of the modified molecular sieve carrier and active components is enhanced; when multiple active components are loaded on the molecular sieve to prepare the dechlorinating agent for use, the adsorption activity of the dechlorinating agent is improved, and meanwhile, due to the addition of the inert separant and the auxiliaries, the sintering of the active components is prevented, so that the whole structure of the dechlorinating agent is more stable, the maximization of the chlorine capacity of the dechlorinating agent is effectively realized, and the dechlorinating agent has the characteristic of high temperature and high water resistance.

Description

technical field [0001] The invention belongs to the technical field of dechlorination agents, and in particular relates to a regenerated flue gas dechlorination agent and a preparation method thereof. Background technique [0002] During the catalytic reforming reaction, with the prolongation of the reaction time, the activity of the catalyst decreases, and the chlorine on the catalyst also gradually loses. In order to maintain a certain acidity of the catalyst, keep the chlorine content on the catalyst stable, and maintain the high activity of the catalyst, it is necessary to continuously inject organic chlorine during the catalyst regeneration process. The catalyst will produce water during the coking process, and the water will take away the chloride ions on the catalyst, so the chlorine in the regeneration flue gas will cause the corrosion of the downstream process pipeline, and at the same time, the discharge into the air will also cause environmental pollution, which i...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of poor high temperature stability and low dechlorination efficiency in the above-mentioned prior art dechlorination method, and propose a regenerated flue gas dechlorination agent and a preparation method thereof, using a modified molecular sieve as a carrier, through Post-treatment changes its surface acidity. Through ion modification and introduction of inert release agent, the chlorine capacity and high-temperature service stability of the molecular sieve dechlorination agent are effectively improved, and the cost is further reduced while meeting the dechlorination requirements of the regenerated flue gas.