TN2013000180A1 - Regenerative recovery of sulfur dioxide from effluent gases - Google Patents

Regenerative recovery of sulfur dioxide from effluent gases

Info

Publication number
TN2013000180A1
TN2013000180A1 TNP2013000180A TN2013000180A TN2013000180A1 TN 2013000180 A1 TN2013000180 A1 TN 2013000180A1 TN P2013000180 A TNP2013000180 A TN P2013000180A TN 2013000180 A TN2013000180 A TN 2013000180A TN 2013000180 A1 TN2013000180 A1 TN 2013000180A1
Authority
TN
Tunisia
Prior art keywords
sulfur dioxide
absorption solution
effluent gases
nox
removal
Prior art date
Application number
TNP2013000180A
Other languages
French (fr)
Inventor
Ernesto Vera-Castaneda
Original Assignee
Mecs Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from PCT/US2011/058314 external-priority patent/WO2012058558A2/en
Application filed by Mecs Inc filed Critical Mecs Inc
Publication of TN2013000180A1 publication Critical patent/TN2013000180A1/en

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals

Landscapes

  • Treating Waste Gases (AREA)

Abstract

This invention relates to processes for the selective removal of contaminants from effluent gases. More particularly, some embodiments of the present invention relate to selective removal and recovery of sulfur dioxide from effluent gases in a sulfur dioxide absorption/desorption process that utilizes a buffered aqueous absorption solution comprising certain weak inorganic or organic acids or salts thereof, preferably certain polyprotic carboxylic acids or salts thereof, to selectively absorb sulfur dioxide from the effluent gas. Oxidation inhibitors may be used. The absorbed sulfur dioxide is subsequently stripped to regenerate the absorption solution and produce a gas enriched in sulfur dioxide content. The regeneration of the absorption solution may include an integrated sulfur dioxide stripper and heat pump system to provide improved energy efficiency. Other embodiments of the present invention relate to a process for simultaneous removal of sulfur dioxide and nitrogen oxides (NOx) from effluent gases and recovery of sulfur dioxide. The process utilizes a buffered aqueous absorption solution further including a metal chelate to absorb sulfur dioxide and (NOx) from the gas and subsequently reducing the absorbed (NOx) to form nitrogen. Still further, the present invention provides a process to control sulfate salt contaminant concentration in the absorption solution by partial crystallization and removal of the sulfate salt crystals.
TNP2013000180A 2011-10-28 2013-04-24 Regenerative recovery of sulfur dioxide from effluent gases TN2013000180A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2011/058314 WO2012058558A2 (en) 2010-10-29 2011-10-28 Regenerative recovery of sulfur dioxide from effluent gases

Publications (1)

Publication Number Publication Date
TN2013000180A1 true TN2013000180A1 (en) 2014-11-10

Family

ID=54360615

Family Applications (1)

Application Number Title Priority Date Filing Date
TNP2013000180A TN2013000180A1 (en) 2011-10-28 2013-04-24 Regenerative recovery of sulfur dioxide from effluent gases

Country Status (1)

Country Link
TN (1) TN2013000180A1 (en)

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