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A low-temperature expansion method of carbon materials and a preparation method thereof for low-temperature desulfurization and denitrification agent

A technology for desulfurization and denitrification and carbon materials, which is applied in the field of ultrasonic activation to prepare low-temperature desulfurization and denitrification agents, and ultrasonic low-temperature expansion of carbon materials. Catalytic denitrification and desulfurization ability is strong, the time is short, and the effect of low carbon loss rate

Inactive Publication Date: 2015-10-28
TAIYUAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, low-temperature denitrification efficiency is low, and carbon materials are high-temperature (800-950°C) H 2 O activation manufacturing porous carbon has the disadvantages of high energy consumption, long time (2-3 hours), high carbon loss rate (20-40%), and low-temperature acid treatment requires long-term immersion, long time-consuming, and low efficiency.

Method used

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  • A low-temperature expansion method of carbon materials and a preparation method thereof for low-temperature desulfurization and denitrification agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Weigh 60g of dried semi-coke with a particle size of 4-6 mesh in a glass beaker, add the prepared 7mol / L HNO 3 150 mL of the solution was put into a digitally controlled ultrasonic generator filled with distilled water, and ultrasonicated at 60°C, 70°C, and 80°C for 7 minutes at an ultrasonic frequency of 50 kHz and an ultrasonic power of 80 W. Pour out the deacid solution, wash with distilled water ultrasonically for 3 times, then pour 100mL of sodium metavanadate solution with a mass fraction of 4%, and under the conditions of ultrasonic frequency 50kHz and ultrasonic power 80W, the temperature is 60°C, 70°C and 80°C. Sonicate for 25 minutes; then filter and dry at 120°C for 5 hours to obtain a desulfurization and denitrification agent, which is put into a desiccator for use.

Embodiment 2

[0045] Weigh 60g of dry coke with a particle size of 4-6 mesh and put it in a glass beaker, add the prepared 4mol / L HNO 3 150mL of the solution was put into a digitally controlled ultrasonic generator filled with distilled water, and ultrasonicated at 60°C, 70°C, and 80°C for 10 minutes at an ultrasonic frequency of 50kHz and an ultrasonic power of 85W. Pour out the deacid solution, wash it ultrasonically for 3 times with distilled water, then pour 100mL ammonium metavanate solution with a mass fraction of 3%, and under the conditions of ultrasonic frequency 50kHz and ultrasonic power 85W, the temperature is 60°C, 70°C and 80°C. Sonicate for 20 minutes respectively; then filter and dry at 125°C for 4 hours to obtain a desulfurization and denitrification agent, which is put into a desiccator for use.

Embodiment 3

[0047] Weigh 60g of dry back coke with a particle size of 4-6 mesh in a glass beaker, add 150mL of the prepared 6mol / L HCl solution, and then put it into a numerically controlled ultrasonic generator filled with distilled water. Under the conditions of ultrasonic frequency 50kHz and ultrasonic power 90W , respectively at temperatures of 60° C., 70° C. and 80° C. for 7 minutes. Pour out the deacid solution, wash it ultrasonically for 3 times with distilled water, pour 100mL of sodium metavanadate and ammonium metavanadate solution with a mass ratio of 1:1 with a total mass fraction of 3%, and use it under the conditions of ultrasonic frequency 50kHz and ultrasonic power 70W Sonicate at 60°C, 70°C and 80°C for 30 minutes respectively; then filter and dry at 140°C for 3.5 hours to obtain a desulfurization and denitrification agent, which is put into a desiccator for use.

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Abstract

The invention relates to a carbon material low-temperature expansion method and a preparation method of low-temperature desulphurization and denitration agent for the same, in particular relates to a carbon material ultrasonic acid low-temperature expansion method and a method for preparing low-temperature desulphurization and denitration agent by means of ultrasonic activation by taking the carbon material as a carrier. The invention can be used for overcoming the defects in the existing technology, and provides an ultrasonic acidizing expansion method for expanding the carbon material quickly and efficiently under low temperature, and a quick, efficiency and energy-saving ultrasonic activation preparation method for preparing the low-temperature desulphurization and denitration agent by using the carbon material expanded by the method above. In the preparation method, one or mixture of hydrogen nitrate, sulfuric acid and hydrochloric acid with certain concentration is used as acid treatment agent, by assistance of ultrasonic waves, the carbon material, such as coke or half coke, is subjected to low-temperature acid treatment, after the porous carbon material is treated by acid treatment, vanadate catalyst is loaded on the carbon material, thus, a flue gas desulphurization and denitration agent is prepared. The product can effectively remove SO2 and NOx in the flue gas under low temperature.

Description

technical field [0001] The invention relates to a carbon material capacity expansion method and a carbon-based low-temperature desulfurization and denitration agent preparation method, in particular to a carbon material ultrasonic low-temperature expansion method and a method for preparing a low-temperature warm desulfurization and denitrification agent by ultrasonic activation using the carbon material as a carrier. Background technique [0002] Energy, economy, and environment are the most serious problems faced by human beings in the process of sustainable development. my country is the largest coal producer and consumer in the world, and 75% of the industrial fuel in the primary energy consumption structure is coal. The combustion of coal causes serious environmental pollution, which is the main soot-type pollution. SO emissions from coal combustion 2 and NO X It is the main polluting gas. Thermal power industry is SO 2 and NO X big emitters. It is mainly discharge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/34B01J32/00B01J23/22B01D53/90B01D53/60
CPCY02A50/20
Inventor 田芳
Owner TAIYUAN NORMAL UNIV
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