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Semi-coke forming SO2and NO adsorptive catalyst and preparation method thereof

A catalyst and semi-coke technology, which is applied in the field of catalyst and its preparation, can solve the problems of high cost and increased desulfurization cost, and achieve the effects of increasing power, achieving a win-win situation for economy and environmental protection, and having a wide range of sources

Inactive Publication Date: 2009-02-11
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process uses a moving bed technology with a certain strength of shaped activated coke, and the cost of coke is relatively high; in addition, there is mechanical wear and loss of carbon during the desulfurization and regeneration process, and fresh activated carbon (coke) needs to be continuously replenished, resulting in desulfurization costs. greater increase in

Method used

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  • Semi-coke forming SO2and NO adsorptive catalyst and preparation method thereof
  • Semi-coke forming SO2and NO adsorptive catalyst and preparation method thereof
  • Semi-coke forming SO2and NO adsorptive catalyst and preparation method thereof

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Embodiment 1

[0016] The preparation process of the present invention is as follows: crush and sieve the semi-coke to obtain 100-mesh particles, put a certain amount of semi-coke powder into a three-necked round-bottomed flask with a ground mouth, add nitric acid with a concentration of 45%, and the volume ratio of the nitric acid solution to the semi-coke The ratio is 1.2:1, the round bottom flask is heated in a constant temperature water bath, and the raw material semi-coke is treated at a constant temperature of 85°C for 1 hour. After taking it out, rinse it with water until the pH>6, and then dry it in a drying oven at 120°C for 2 hours. Dried nitric acid activated semi-coke powder 80%, binder: coal tar 14%, pore former: starch 1.5% and 2.0% kaolin, 1.0% vanadium pentoxide, 1.0% polyethylene glycol and 0.5% graphite (both are mass percentages) After fully mixing evenly, add water to adjust to an appropriate viscosity, extrude on a catalyst extrusion molding device, the particle diameters...

Embodiment 2

[0018] The preparation process of the present invention is as follows: crush and sieve the semi-coke to obtain 100-mesh particles, put a certain amount of semi-coke powder into a three-necked round-bottomed flask with a ground mouth, add nitric acid with a concentration of 45%, and the volume ratio of the nitric acid solution to the semi-coke The ratio is 1.2:1, the round bottom flask is heated in a constant temperature water bath, and the raw material semi-coke is treated at a constant temperature of 85°C for 1 hour. After taking it out, rinse it with water until the pH>6, and then dry it in a drying oven at 120°C for 2 hours. 70% of dried nitric acid activated semi-coke powder, binder: pitch 18.0%, pore-forming agent: 4.0% molasses and 4.5% bentonite, 2.0% ferric oxide, 1.0% polyethylene glycol and 0.5% graphite ( Both are mass percentages) mixed well, then added water to adjust to proper viscosity, extruded on catalyst extrusion molding device, the particle diameters are ∮2m...

Embodiment 3

[0020]The preparation process of the present invention is as follows: crush and sieve the semi-coke to obtain 100-mesh particles, put a certain amount of semi-coke powder into a three-necked round-bottomed flask with a ground mouth, add nitric acid with a concentration of 45%, and the volume ratio of the nitric acid solution to the semi-coke The ratio is 1.2:1, the round bottom flask is heated in a constant temperature water bath, and the raw material semi-coke is treated at a constant temperature of 85°C for 1 hour. After taking it out, rinse it with water until the pH>6, and then dry it in a drying oven at 120°C for 2 hours. The dried nitric acid activated semi-coke powder is 76%, binder: polyvinyl alcohol 14.0%, pore-forming agent: starch 4.0% and 3.0% bentonite, 1.5% ferric oxide, 1.0% polyethylene glycol and 0.5% Graphite (both in mass percentage) is fully mixed, then added water to adjust to an appropriate viscosity, extruded on a catalyst extrusion molding device, the pa...

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Abstract

The invention discloses a shaped semi-coke SO2 and NO adsorption catalyst and a preparation method thereof. The catalyst comprises 70wt percent to 80wt percent of active semi-coke, 10wt percent to 20wt percent of adhesive, 0.5wt percent to 4.0wt percent of pore-forming agent, 1.5wt percent to 4.5wt percent of kaoline and / or bentonite, 1.0wt percent to 2.0wt percent of vanadium pentoxide and / or ferric oxide, 1.0wt percent of polyethylene glycol and 0.2wt percent to 0.5wt percent of graphite (all are according to the weight percentage). The preparation method comprises the steps that the semi-coke is firstly treated with nitric acid pre-treatment, then added with the adhesive and other catalyst promoters to be extruded and shaped and then dried and activated with high-temperature vapor under oxygen to obtain the shaped semi-coke adsorption catalyst. The catalyst can remove not only sulfur dioxide from flue, but also NO, thus having good prospect of application.

Description

technical field [0001] The invention relates to a catalyst used in coal-fired power plants, coal-fired boilers and coal-fired kilns, etc. 2 And the preparation method of NO adsorption catalyst. Background technique [0002] According to statistics, in 1998 the national SO 2 The total emissions reached 20.9 million tons, ranking first in the world, NO x emissions also accounted for 10.1% of the world's total. About 87% of which SO 2 , 67% NO x from coal combustion. In 2006, the national SO 2 The emissions were 25.888 million tons, the emissions of soot were 10.784 million tons, and the emissions of industrial dust were 8.075 million tons. If measures are not taken quickly, my country's SO in 2010 2 Annual emissions will be close to 30 million tons, NO x Total emissions will be close to 10 million tons. In 2006, the national environmental pollution control investment was 240.28 billion yuan, accounting for 1.15% of GDP. Among them, the investment in urban environmen...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J23/22B01J21/18B01J20/20B01D53/60
CPCY02A50/20
Inventor 李春虎王文泰冯丽娟侯影飞于英民
Owner OCEAN UNIV OF CHINA
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