Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Claus tail gas SO2 sorbent and preparation and use thereof

A Claus tail gas and adsorbent technology, which is applied in other chemical processes, chemical instruments and methods, and the separation of dispersed particles, can solve problems such as difficult application, high production cost, and high toxicity

Active Publication Date: 2014-12-17
PETROCHINA CO LTD
View PDF7 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most prominent problems are: poor wear resistance, high toxicity, high production cost, and low desulfurization efficiency
for SO 2 For the Claus tail gas with a content of 3000-30000ppm, this adsorbent is difficult to apply

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Claus tail gas SO2 sorbent and preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Dissolve ferric nitrate 100g, magnesium nitrate 250g, aluminum nitrate 50g nitrate in aqueous solution to prepare 0.5L metal nitrate solution; prepare 1L alkaline solution with 100g sodium hydroxide and 40g sodium carbonate solution aqueous solution; under rapid stirring, The two solutions are titrated and mixed, and the titration process ensures that the pH of the mixed solution is 9.0-10.0. After the titration, keep the temperature at 70°C for more than 15 hours; filter the formed precipitate and wash with water until the pH is 7.0. After drying for 8 hours, calcining at 500° C. for 5 hours, and crushing, the hydrotalcite-like powder was prepared.

[0017] Take 150g of crushed hydrotalcite powder of 200-300 meshes, add 20ml of 200g / L lanthanum nitrate solution to mix, so that the hydrotalcite powder can fully absorb rare earth nitrate, and then mix with high temperature resistant cement, carboxymethyl cellulose and so on are fully mixed and extruded to prepare the ad...

Embodiment 2

[0027]Dissolve a certain proportion of manganese nitrate 150g, magnesium nitrate 200g, aluminum nitrate 50g nitrate in aqueous solution to prepare 0.5L metal nitrate solution; prepare 1L alkaline solution with 100g sodium hydroxide and 40g sodium carbonate solution aqueous solution; Under stirring, the two solutions are mixed at a certain titration speed, and the titration process ensures that the pH of the mixed solution is 9.0-10.0. After the titration, keep the temperature at 70°C for more than 15 hours; filter the formed precipitate and wash it with water until the pH is 7.0. After drying for 10 hours, calcining at 600° C. for 5 hours, and crushing, the hydrotalcite-like powder was prepared.

[0028] Take 150g of crushed hydrotalcite powder of 200-300 meshes, add 30ml of 200g / L cerium nitrate solution to mix, so that the hydrotalcite powder can fully absorb rare earth nitrate, and then mix with aluminum glue, carboxymethyl cellulose, etc. Fully mixed and extruded to prepa...

Embodiment 3

[0031] Dissolve a certain proportion of copper nitrate 200g, magnesium nitrate 150g, and aluminum nitrate 50g nitrate in aqueous solution to prepare 0.5L metal nitrate solution; prepare 1L alkaline solution with 100g sodium hydroxide and 40g sodium carbonate solution aqueous solution; Under stirring, the two solutions are mixed at a certain titration speed, and the titration process ensures that the pH of the mixed solution is about 9.0 to 10.0. After the titration, keep the temperature at 70°C for more than 15 hours; filter the formed precipitate and wash it with water until the pH is about 7.0. After drying for 12 hours, calcining at 600° C. for 4 hours, and crushing, the hydrotalcite-like powder was prepared.

[0032] Take 150g of crushed hydrotalcite powder of 200-300 meshes, add 40ml of 200g / L yttrium nitrate solution and mix, so that the hydrotalcite powder can fully absorb rare earth nitrate, and then fully mix it with high-temperature resistant cement, sage, etc. Mixi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a Claus tail gas SO2 sorbent and preparation and use thereof; a transition metal, magnesium and aluminum nitrate with the mole ratio of 1:0.1-5:0.05-2 are dissolved in a water solution for preparation of a 1mol / L solution taking the transition metal for calculation; sodium hydroxide and sodium carbonate with the mole ratio of 1:0.1-2 are dissolved in water for preparation of a 1mol / L solution taking the NaOH for calculation; the two solutions are mixed; a precipitate formed by filtering is washed with water until the pH is 7; the precipitate is processed by drying, calcining and crushing to obtain hydrotalcite-like compound powder; 50g of the hydrotalcite-like compound powder is taken, a Ce, yttrium or lanthanum salt solution is added for immersion, high temperature resistant cement and carboxymethyl cellulose are added, and then the sorbent is obtained by calcining. The SO2 content in the tail gas is lower than 500ppm after adsorption desulfurization with the sorbent, and the sorbent SO2 sulfur adsorption capacity (taking SO2 for calculation, m mSO2 / m sorbent) is above 10%.

Description

technical field [0001] The present invention relates to a kind of SO 2 Adsorbents, especially a recyclable Claus tail gas SO 2 The adsorbent and its preparation method and application belong to the technical field of adsorption technology applied to air pollution control. Background technique [0002] Sulfur dioxide is one of the main pollutants in the atmosphere and an important symbol to measure whether the atmosphere is polluted. my country's mandatory standard "Integrated Emission Standard of Air Pollutants" (GB16297-1996), which was implemented in 1997, stipulates that SO 2 The maximum allowable discharge mass concentration of existing pollution sources and new pollution sources is 1200mg / m3 respectively 3 and 960mg / m 3 . As countries around the world increase their efforts to protect the atmospheric environment, SO 2 emissions will be more stringent. [0003] Since the British chemist Claus proposed the Claus sulfur production process in 1883, although the Claus...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/30B01D53/02
Inventor 何登华黄黎明何金龙陈昌介温崇荣常宏岗黄洪发杨芳
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com