WO2014057505A4 - An electrochemical system and process for the reduction of nitric acid concentration using electrolytic cell - Google Patents

An electrochemical system and process for the reduction of nitric acid concentration using electrolytic cell Download PDF

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Publication number
WO2014057505A4
WO2014057505A4 PCT/IN2013/000620 IN2013000620W WO2014057505A4 WO 2014057505 A4 WO2014057505 A4 WO 2014057505A4 IN 2013000620 W IN2013000620 W IN 2013000620W WO 2014057505 A4 WO2014057505 A4 WO 2014057505A4
Authority
WO
WIPO (PCT)
Prior art keywords
nitric acid
electrolytic cell
ranging
reduction
per hour
Prior art date
Application number
PCT/IN2013/000620
Other languages
French (fr)
Other versions
WO2014057505A1 (en
Inventor
Subbaiah TONDEPU
Barada Kanta Mishra
Sanjay KALI
Chinmaya Kumar SARANGI
Avijit BISWAL
Satyabrata MISHRA
Mallika CHELLANADAR
Kamachi Mudali UTHANDI
Natarajan Rajamani
Raj Baldev
Original Assignee
Council Of Scientific & Industrial Research
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
Application filed by Council Of Scientific & Industrial Research filed Critical Council Of Scientific & Industrial Research
Priority to US14/435,343 priority Critical patent/US20150291451A1/en
Publication of WO2014057505A1 publication Critical patent/WO2014057505A1/en
Publication of WO2014057505A4 publication Critical patent/WO2014057505A4/en

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Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
    • G21C19/42—Reprocessing of irradiated fuel
    • G21C19/44—Reprocessing of irradiated fuel of irradiated solid fuel
    • G21C19/46—Aqueous processes, e.g. by using organic extraction means, including the regeneration of these means
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/02—Process control or regulation
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/04—Treating liquids
    • G21F9/06—Processing
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Plasma & Fusion (AREA)
  • Automation & Control Theory (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

The present invention discloses an electrochemical system and process for the reduction of nitric acid concentration present in industrial waste using electrolytic cell. The present invention further relates to an electrochemical process for the reduction of nitric acid concentration using an electrolytic cell useful in reducing the volume of the high level liquid waste solution (HLLW) and avoiding corrosion of the storage tanks for high level liquid waste solution (HLLW).

Claims

AMENDED CLAIMS
received by the International Bureau on 26 May 2014 (26.05.2014)
We Claim:
1 ) An electrochemical system for instantaneous electrolytic reduction of nitric acid concentration of 3.9 M - 4 M present in nuclear waste to 0.9 M - 1.1 1 M in a continuous mode of operation.
2) The system as claimed in claim 1 , wherein cathode used in diaphragm-less electrolytic cell is Ir02 coated titanium. 3) The system as claimed in claim 1 , wherein anode used in diaphragm-less electrolytic cell is Pt electroplated titanium.
4) The system as claimed in claim 1 , wherein Ir02 coated titanium cathodes and Pt electroplated titanium anodes are placed alternately inside the diaphragm-less electrolytic cell.
5) An electrochemical process for the reduction of nitric acid concentration in industrial waste in electrochemical system as claimed in claim 1 comprising filling nitric acid to the storage tank ST101 at a rate ranging between 20 to 25 ml per hour followed by agitation and recirculation of the nitric acid continuously from the storage tank through the electrolytic cell at a cathodic current density of 500 to 600 A/m2 for a time period ranging between 30 hours to 48 hours at a temperature ranging between 40 °C to 52 °C at a cell voltage ranging between 3 volts to 3.2 volts to obtain a nitric acid solution of reduced concentration of 0.9 M to 1 .1 M concentration.
6) The process as claimed in claim 5, wherein nitric acid of concentration ranging between 3.9 M to 4 M is taken as input acid to the electrolytic cell. 7) The process as claimed in claim 5, wherein feeding rate of nitric acid to the storage tank is in the range of 20 ml per hour to 25 ml per hour.
15 8) The process as claimed in claim 5, wherein output rate of nitric acid solution is in the range of 20 ml per hour to 25 ml per hour.
9) The process as claimed in claim 5, wherein, recirculation rate of nitric acid solution is ranging between 150 ml per min to 300 ml per min.
10) The process as claimed in claim 5, wherein electrolytic reduction of the input acid solution occurs keeping the volume of the solution inside the cell constant.
16
PCT/IN2013/000620 2012-10-12 2013-10-14 An electrochemical system and process for the reduction of nitric acid concentration using electrolytic cell WO2014057505A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/435,343 US20150291451A1 (en) 2012-10-12 2013-10-14 Electrochemical system and process for the reduction of nitric acid concentration using electrolytic cell

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
INDE31982012 2012-10-12
IN3198/DEL/2012 2012-10-12

Publications (2)

Publication Number Publication Date
WO2014057505A1 WO2014057505A1 (en) 2014-04-17
WO2014057505A4 true WO2014057505A4 (en) 2014-07-10

Family

ID=49780125

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2013/000620 WO2014057505A1 (en) 2012-10-12 2013-10-14 An electrochemical system and process for the reduction of nitric acid concentration using electrolytic cell

Country Status (1)

Country Link
WO (1) WO2014057505A1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3158577A (en) 1963-06-20 1964-11-24 Lane A Bray Method of treating radioactive waste
GB1280914A (en) 1969-07-11 1972-07-12 Kernforschung Gmbh Ges Fuer Method of removing nitric acid, nitrate ions, and nitrite ions out of aqueous waste solutions
DE2449588C2 (en) 1974-10-18 1985-03-28 Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe Process for the decomposition of an aqueous, radioactive waste solution with dissolved, inorganic and organic substances
DE2609299C2 (en) 1976-03-06 1983-12-22 Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe Device for solidifying aqueous, radioactive waste solutions in a glass or ceramic-like block
DE3047988C2 (en) * 1980-12-19 1982-11-04 Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe Process for reducing the acid content of a nitric acid solution using an electrolysis current and device for carrying out the process
DE3135195A1 (en) * 1981-09-05 1983-03-24 Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe METHOD FOR THE ELECTROCHEMICAL DECOMPOSITION OF Nitric Acid
JP3078107B2 (en) 1992-04-07 2000-08-21 日本原子力研究所 Radioactive waste volume reduction method
FR2781783B1 (en) 1998-07-28 2000-12-08 Commissariat Energie Atomique PROCESS FOR REDUCING THE CONCENTRATION OF NITRATES AND / OR NITRIC ACID OF AN AQUEOUS SOLUTION

Also Published As

Publication number Publication date
WO2014057505A1 (en) 2014-04-17

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