Molecular sieve absorbent

A technology of adsorbent and molecular sieve, which is applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of regeneration difficulties, reduce the adsorption capacity of carbon-based adsorbents, reduce the desulfurization effect of adsorbents, etc., and achieve good regeneration and long service life Prolonged, high adsorption capacity effect

Active Publication Date: 2009-06-17
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010]Since sulfur-containing solids are easy to deposit on the surface of carbon materials to block the adsorption pores, the adsorption capacity of the carbon-based adsorbent is reduced, and regeneration is difficult, reducing the adsorption capacity of the adsorbent. desulfurization effect

Method used

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  • Molecular sieve absorbent
  • Molecular sieve absorbent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Slowly add 20g of water glass (SiO 2 25.5%, Na 2 O9.3%, H 2 (065.2%), warming up to 70°C, adjusting pH=8.5, adding directing agent (12Na 2 O:Al 2 o 3 : 5SiO 2 : 28OH 2 (0), after stirring for 30min, filter and wash, then add 10g concentration and be the ammonia solution of 5% vanadium pentoxide, add 2ml polyacrylic acid to extrude and granulate, dry, and roast at 400 DEG C for 4 hours to obtain vanadium-containing Molecular sieve, its SiO 2 / Al 2 o 3 is 3.4.

Embodiment 2

[0055] Slowly add 160g of 20% Na 2 SiO 3 9H 2 O solution, warm up to 90°C, adjust pH=9.5, add directing agent (8Na 2 O:Al 2 o 3 : 8SiO 2 : 300H 2 O), after stirring for 60min, filter and wash, add 10g5%NH 4 VO 3 ammonia solution, add 2ml of polyvinyl alcohol to extrude and granulate, after drying, bake at 600°C for 2 hours to obtain a molecular sieve containing vanadium, its SiO 2 / Al 2 o 3 is 6.8.

Embodiment 3

[0057] Take by weighing the molecular sieve that 5g embodiment 1 makes, after vacuumizing, add 100ml concentration and be 10% Cu(SO 4 ) 2 The solution was placed on an ultrasonic oscillator, soaked for 600min at an ultrasonic frequency of 30kHz and a temperature of 50°C, filtered, dried at 120°C, and then baked in a muffle furnace at 450°C for 12 hours to obtain the adsorbent XF-1 .

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Abstract

The invention relates to a molecular sieve sorbent, in particular to a flue gas desulphurization sorbent applicable to the treatment of SO2 in boiler flue gas. The sorbent comprises the following compositions by mass percentage: 0.1 to 5 percent of V2O5, 4 to 30 percent of CuO and 65 to 95.9 percent of silicon-aluminum molecular sieve. The molecular sieve sorbent takes molecular sieve as a carrier and contains vanadium and copper at the same time; moreover, a small amount of boron, aluminum, magnesium, titanium, chromium, manganese, iron, cobalt, nickel, zinc, zirconium, molybdenum, argentum, platinum, rhenium, or one or more elements in lanthanide or corresponding oxides can be added in the molecular sieve sorbent. The sorbent has the advantages of high adsorption capacity, excellent reproducing property, long service life and the like, and is not only applicable to flue gas desulphurization, but also applicable in gas purification fields such as CO removal and nitrogen oxide reduction.

Description

technical field [0001] The invention relates to a molecular sieve adsorbent, especially a kind of adsorbent suitable for treating SO in boiler flue gas 2 flue gas desulfurization adsorbent. Background technique [0002] Coal and other fossil fuels have long occupied an important position in my country's energy structure. The sulfur oxides contained in the exhaust gas emitted by coal-fired power plants and smelters have caused environmental pollution due to air pollution and acid deposition. In order to control the environmental hazards caused by sulfur dioxide emissions, flue gas desulfurization (FGD) technology emerged as the times require. Among various desulfurization methods, regenerative adsorption method is a recyclable technology that can not only control atmospheric sulfur pollution, but also recover sulfur resources. It has been extensively studied in recent years. [0003] The regenerative adsorption method uses an adsorbent with a certain structure to remove the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18
Inventor 王昆王立蓉刘发强刘光利梁宝锋荣树茂吴东
Owner PETROCHINA CO LTD
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