New Flemion Membranes for Zero Gap Configuration Contents - - PowerPoint PPT Presentation

New Flemion Membranes for Zero Gap Configuration

Clorosur Technical Seminar & WCC Safety Workshop

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Contents Next Generation Membrane F-8080A : New Type of F-8080 series for Zero Gap Influence of Zero Gap on the membrane

Configuration of Finite Gap and Zero Gap

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Finite Gap Zero Gap

Elastic Cushion

Anode Membrane Cathode Membrane

Fine Mesh Cathode

Anode

Woven Mesh

Expand Metal

Current Collector

Less Catholyte Flow at Membrane Surface

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Finite Gap Zero Gap

Anode Membrane Cathode Membrane Anode

Expand Metal

Catholyte Flow Catholyte Flow Less flow of catholyte at membrane surface removes less heat of membrane, which makes membrane higher temperature than catholyte outlet. Elastic Cushion Fine Mesh Cathode

Woven Mesh

Current Collector Less Flow caused by the structure

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95 96 97 98 65 70 75 80 85 90 95 100 105 CE (%) Catholyte outlet temperature (oC) F-8080, 6 kA/m2, 32 wt% NaOH, 200 g/l NaCl

Higher Temperature in Zero Gap

Zero gap with fine mesh cathode and elastic cushion Finite gap

The temperature of the membrane in zero gap is at least 5 oC higher than in finite gap.

Magnified View of Configuration

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Zero Gap

Elastic Cushion

Woven Mesh

Fine Mesh Cathode

Finite Gap

Anode Membrane Cathode

Expand Metal

Anode Membrane

Less H2 Gas Flow in Zero Gap Structure

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Zero Gap

Elastic Cushion Anode

Woven Mesh

Fine Mesh Cathode

Membrane

Finite Gap

Anode Membrane Cathode

Expand Metal

H2 gas Flow Less Flow Less flow makes more H2 gas bubbles touch the membrane, caused by zero gap structure. H2 Gas

Higher H2 in Cl2 at Lower CD

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0,2 0,4 0,6 0,8 1 1,2 1,4 70 72 74 76 78 80 82 84

H2/Cl2 on anode side (vol%) Catholyte outlet temperature (oC) Finite Gap (0.8kA/m2) Zero Gap (0.7kA/m2)

Zero gap shows higher H2 in Cl2 than finite gap in same electrolyzer, which indicates more H2 gas touches to cathode side surface of the membrane.

H2/Cl2 on anode side at low CD in commercial size electrolyzer

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Contents Next Generation Membrane F-8080A ; New Type of F-8080 series for Zero Gap Influence of Zero Gap on the membrane

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95 96 97 98 65 70 75 80 85 90 95 100 105 CE (%) Catholyte outlet temperature (oC) F-8080, 6 kA/m2, 32 wt% NaOH, 200 g/l NaCl

F-8080 : CE Decrease in Zero Gap

Zero gap with fine mesh cathode and elastic cushion Finite gap

F-8080 in zero gap shows 0.5-1% lower CE than in finite gap at high temperature.

95 96 97 98 65 70 75 80 85 90 95 100 105

CE (%) Catholyte outlet temperature (oC)

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F-8080A : Higher CE at High Temperature

F-8080 F-8080A shows more than 96 % CE even at 100 oC.

Finite gap (Lab cell)

F-8080A

6 kA/m2, 32 wt% NaOH, 200 g/l NaCl

95 96 97 98 65 70 75 80 85 90 95 100 105

CE (%) Catholyte outlet temperature (oC)

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F-8080A : Higher CE in commercial size nx-BiTAC

F-8080A in commercial nx-BiTAC with zero gap shows high enough CE at high temperature.

Zero gap (Commercial size nx-BiTAC)

F-8080

in commercial size nx-BiTAC

F-8080A

in commercial size nx-BiTAC 6kA/m2, 32wt% NaOH, 200g/l NaCl F-8080 in Lab with finite gap

95 96 97 98 100 150 200 250 CE (%) NaCl (g/l)

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F-8080A : Higher CE in Hydrated Condition

F-8080A shows higher CE in weak brine.

Lab cell, 6 kA/m2, 90 oC, 32 wt% NaOH

F-8080A F-8080

Features of F-8080A

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• 1. Higher stability for zero gap

・Especially, higher CE at high temperature

• 2. Higher CE against hydrated state
• 3. Same voltage and durability as F-8080

・higher CE in weak brine ・Low voltage and high durability ・Fine adjustment of F-8080 which has proven reliability

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Contents

Next Generation Membrane

F-8080A : New Type of F-8080 series for Zero Gap Influence of Zero Gap on the membrane

・Lowest Voltage ・Higher CE in Wider Range ・Higher Durability against I/Ba

Next Generation

Lowest Voltage

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2000 2005 2015 2020

+60 +30

• 30
• 60
• 90

Voltage Reduction

Unit : mV at 6 kA/m2

2010

F-8080A F-8020SP F-8020 F-8080 Fx-634

• 50 mV

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50 100 150 200 250 300 350 400 450 500

Prototypes of next generation membrane keep stable low voltage in AGC commercial electrolyzers for over one year.

Next Generation

Stability of Lowest Voltage

+60 +30

• 30
• 60
• 90

Voltage Reduction

Unit : mV at 6 kA/m2 D.O.L

BM2.7v5 (AGC Commercial Plant) BM2.7v6 (AGC Commercial Pilot)

F-8080A F-8020SP F-8020

Note; ・Prototypes;-30～-50mV ・Latest type after optimizing manufacturing process;-50mV

• 50 mV

F-8080 Fx-634

Key Technology of Next Membrane

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What is new? Three new technologies were

• ptimally combined

Key Technology of Next Membrane

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Advantages Key Technologies Voltage Reduction Fiber Arrangement Higher CE in Wider Range Fine Ion Channel Higher Durability against I/Ba Uniform Ion Channel

Optimized Fiber Arrangement

Sacrificial Fiber PTFE Fiber

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Optimized Cloth Conventional Cloth Making use of optimized fiber arrangement, this makes next generation membrane shows lowest voltage.

F-8080/F-8080A Next generation

Next generation membrane shows higher CE not only at high temperature but also at low temperature.

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94 95 96 97 98 65 75 85 95 105 C.E. (%) Catholyte outlet temperature (deg-C)

New Generation F-8080 F-8080A

Higher CE in Wider Temperature Range

6 kA/m2, 32 wt% NaOH, 200 g/l NaCl 95 96 97 98 65 70 75 80 85 90 95 100 105 CE (%) Catholyte outlet temperature (oC)

Next Generation F-8080A F-8080

95 96 97 98 100 150 200 250 CE (%) NaCl (g/l)

Next generation membrane shows higher CE in weak brine. It is suitable for electrolyzers which have less inner circulation of brine.

6 kA/m2, 90 oC, 32 wt% NaOH

Next Generation F-8080A F-8080

Higher CE in Weak Brine

94 95 96 97 98 25 30 35 40 CE (%) NaOH (wt%)

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Higher CE in Wider Range of Caustic Strength

Next generation shows higher CE in weak and strong caustic.

6 kA/m2, 90 oC, 200 g/l NaCl

Next Generation F-8080A F-8080

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Durability against I/Ba

92 93 94 95 96 97 98 5 10 15 CE (%) DOL after addition

F-8080 Next Generation

6 kA/m2, 80 oC, I/Ba=20/1 ppm

Next generation membrane has higher durability against I/Ba.

Note : Same durability against Ca as F-8080

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Furthermore!

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F-8080 F-8080A Fx-XXX F-8080HD Ratio to F-8080

Frequent Load Tensile Test

Total number of frequent load tensile test until membrane breaking (Sum of the value to various direction. Load : 60 % of tensile strength)

Next generation membrane is more robust than F-8080 and F-8080A.

Next Generation

Next Generation Membrane : Fx-634

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• 1. Lowest voltage

・50 mV lower voltage than F-8080 and F-8080A

• 3. Higher durability against I/Ba
• 2. Higher CE in both hydrated and dehydrated state

・Suitable for zero gap and finite gap ・Suitable for electorolyzer which has less inner circulation of brine

• 4. Better robustness

・Optimized fiber arrangement

Large quantity of Fx-634 will be delivered from 2Q 2017.

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Summary Next Generation Membrane : Fx-634 F-8080A : New Type of F-8080 series for Zero Gap Influence of Zero Gap on the membrane

・Higher temperature due to less heat removal ・50 mV lower voltage than F-8080/F-8080A ・Higher CE in both more hydrated and more dehydrated state ・Durability against I/Ba and better robustness ・Advanced F-8080 for higher temperature and weak brine, for hydrated state. ・Fine adjustment of F-8080 which has proven reliability.

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Information of CTCN

(Climate Technology Centre and Network )

Importance of Energy Saving

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• Expected energy consumption reduction by

converting into membrane is 20-30%.

Electrolysis Process Mercury Diaphragm Membrane Energy efficiency as 1.0 0.8-0.9 0.7-0.8

Potential financial scheme by UNFCCC

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• COP 16 in 2010

established the Technology Mechanism.

• Climate Technology Centre &

Network (CTCN) is the operational arm of the Technology Mechanism.

Courtesy: Rajiv Garg, ”CTCN: Support implementation of NAMAs”

Potential financial scheme by UNFCCC

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The CTCN’s mission is “Stimulating technology cooperation and enhance the development and transfer of technologies to developing country Parties at their request”

• 1. Technical assistance to developing countries
• 2. Knowledge sharing and training
• 3. Fostering collaboration on climate technologies

(including linking climate technology projects with financing opportunity) Services:

Overview of CTCN Services

• 1. Technical

Assistance

• 2. Information

and Knowledge

• 3. Collaboration

and Networking Climate Technology Centre and Network Environmentally sound technologies deployed Facilitate and enhance the transfer of climate technologies Greenhouse gas emissions reduced and resilience to climate change increased Targets in INDCs achieved

Courtesy: Rajiv Garg, ”CTCN: Support implementation of NAMAs”

CTCN Technical Assistance

Provided:

• To developing countries upon their request
• Free of charge (value up to 250,000 USD)
• State of the art and locally relevant expertise
• To academic, public, NGO, or private entities…

Fast and short (3 pages) application process for countries

Courtesy: Rajiv Garg, ”CTCN: Support implementation of NAMAs”

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Thank you for your attention