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A kind of non-toxic rare earth type denitrification catalyst and its preparation method and application

A denitrification catalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of rarely reported solutions, reduce catalytic activity, and prevent catalysts from having a cascaded pore structure system. To achieve the effect of overcoming the lack of conversion activity, improving catalytic performance, protection and catalytic performance

Active Publication Date: 2018-01-02
REZEL CATALYSTS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this pore-forming method using organic template burning can increase the stacked pores of some large pores, but it cannot make the catalyst have a hierarchical pore structure system.
[0012] In addition, the carrier often has to go through a high-temperature sintering process to have good strength, but it will affect the nano-TiO 2 and its phase bring adverse effects, reduce catalytic activity, and rarely report solutions in the prior art

Method used

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  • A kind of non-toxic rare earth type denitrification catalyst and its preparation method and application
  • A kind of non-toxic rare earth type denitrification catalyst and its preparation method and application
  • A kind of non-toxic rare earth type denitrification catalyst and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Will be taken from the deactivation of a local oil refinery in Shandong and unload the spent oil refinery catalyst (deoiled), and 250 grams of rare earth type catalytic cracking spent catalyst (FCC cerium-rich type anti-vanadium agent, CeO 2 4%, alumina ≥ 45%) and 250 grams of tungsten-containing hydrodenitrogenation refined waste catalyst (WO 3 22%, macroporous alumina ≥ 70%), crushed, ball milled, and passed through a 60-mesh sieve, mixed with 100 grams of high-alumina cement (industrial products, alumina ≥ 50%, Beijing Aoming Technology Co., Ltd.), 20 grams Corn starch (industrial product, moisture ≤ 11%, Nanjing Hanying Chemical Co., Ltd.), add deionized water and knead in a kneader. The water / powder weight ratio of the material is about 0.3:1. After kneading, it is extruded into a honeycomb shape The green body is cured at room temperature of 25° C. for 24 hours to become a silicon and aluminum oxide honeycomb green body containing rare earth and tungsten.

[00...

Embodiment 2

[0052] The molybdenum-containing hydrodesulfurization spent catalyst (MoO 3 13%, macroporous alumina ≥ 70%) 250 grams, replace the hydrodenitrogenation refining waste catalyst containing tungsten in embodiment 1, other preparation contents and steps are identical with embodiment 1, obtain the catalyzer of embodiment 2.

Embodiment 3

[0054] Get 200 grams of manganese acetate (chemically pure, ≥95%, Beijing Chemical Reagent Company), replace 140 grams of zirconium oxychloride in embodiment 1, other preparation content and steps are identical with embodiment 1, obtain the catalyst of embodiment 3.

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Abstract

The invention relates to a non-toxic rare earth denitrification catalyst and its preparation method and application. The catalyst uses the rare earth type FCC waste agent and the hydrogenation waste agent containing tungsten and molybdenum in the oil refining catalyst, and after crushing and grinding, it is mixed with high aluminum Cement and starch are extruded and solidified into a honeycomb green body; nano anatase-type TiO2 is grown in situ by a hydrothermal method to form a composite oxide carrier with a shell-green body structure; impregnated with rare earth, zirconium, and manganese After waiting for active components, it is activated by roasting. The catalyst has a hierarchical pore system with <2nm micropores, 2-5nm mesopores and >5nm macropore stacked pores, which is conducive to the diffusion of reactants and products in the process of flue gas denitrification, and has good performance in a wide temperature range. NOx conversion activity; poisonous V2O5 is not used in the preparation, which avoids the harm to the environment and personnel in each link, and reduces the conversion rate of SO2 / SO3; reduces the amount of active components and high-temperature sintering steps, and makes the waste refinery agent resourceful Utilization saves manufacturing cost and is an environmentally friendly green preparation.

Description

technical field [0001] The invention relates to a flue gas denitration catalyst and its preparation and application, more specifically to a non-toxic rare earth nano-TiO 2 NH on composite oxide supports 3 The catalyst for selectively removing NOx and its preparation method and application belong to the fields of air pollution control technology and environmental protection catalytic materials. Background technique [0002] NOx can produce photochemical smog, acid rain, ozone hole and greenhouse effect. It is one of the main pollutants in the atmosphere. The source of NOx mainly comes from the combustion of coal in transportation and thermal power generation. With the development of my country's economy, my country's coal energy consumption and the number of motor vehicles have increased significantly, resulting in a rapid increase in the content of various pollutants in the air. After decades of hard work, my country is controlling dust and SO 2 Significant progress has b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/30B01J23/28B01J23/34B01D53/90B01D53/56
Inventor 付云芝
Owner REZEL CATALYSTS CORP