JCM_SA_F_PM_ver01.0

JCM Proposed Methodology Form
Cover sheet of the Proposed Methodology Form
Form for submitting the proposed methodology
Host Country

Saudi Arabia

Name of the methodology proponents Thyssenkrupp
submitting this form

Uhde

Chlorine

Engineers(Japan) Ltd.
Kanematsu Corporation

Sectoral scope(s) to which the Proposed 3. Energy demand
Methodology applies
Title of the proposed methodology, and Introduction of High Efficiency Electrolyzer
version numberin Chlor-Alkali Processing Plant, Version 01.0

List of documents to be attached to this form

The attached draft JCM-PDD:(please check):

Additional information

Date of completion

06/09/2017

History of the proposed methodology
Version01.0

Date
06/09/2017

Contents revisedFirst edition1

JCM_SA_F_PM_ver01.0

A. Title of the methodology
Introduction of High Efficiency Electrolyzer in Chlor-Alkali Processing Plant, Version 01.0

B. Terms and definitions
Terms

Definitions

Electrolyzer

An equipment used for the electrolysis of alkali chloride
solution, composed of an anode chamber, anode, cathodechamber, cathode, and an ion exchange membrane.

Ion-exchange membrane

Method for the electrolysis of alkali chloride solution

method (IEM)

separates the cathode and anode chambers, in which acation exchange membrane possesses special properties
that permit only transmission of cations (positive ions) notof anions (negative ions).

Bipolar electrolyzer

Electrolyzer in which the elements are connected in series
and the power supply is connected only to the end part ofthe electrolyzer.

C. Summary of the methodology
Items
GHG

emissionmeasures

Summary
reduction Installing ion-exchange membrane electrolyzer, which reduces
electricity resistance of the electrolyzer unit and achieves
electricity consumption reduction in the chlor-alkali process.
This methodology applies to the project that aims for savingenergy by introducing high efficiency electrolyzer for the target
factory, commercial facilities etc. in Saudi Arabia.

Calculation
emissions

ofreference Reference emissions are GHG emissions from using referenceelectrolyzer, calculated with power consumption of projectelectrolyzer, ratio of the initial guarantee of specific electricity
consumptions of reference/project electrolyzers and CO2
emission factor for electricity consumed. The initial guaranteeof the electrolyzer has to be satisfied at the new plant, whose2

JCM_SA_F_PM_ver01.0

membranes, electrodes and other elements are in the condition
that has not used and shows the best performance.
Calculationofproject Project emissions are GHG emissions from using projectemissionselectrolyzer, calculated with electricity consumption of projectelectrolyzer and CO2 emission factor for electricity consumed.

Monitoring parametersElectricity consumption of project electrolyzer

The amount of fuel consumed and/or the amount ofelectricity generated by captive power, where applicable.

D. Eligibility criteria

This methodology is applicable to projects that satisfy all of the following criteria.
Criterion 1

Project electrolyzer employs an ion-exchange membrane technology inelectrolyzers in the manufacturing process of chlor-alkali and the electrolyzer
is the bipolar type.

Criterion 2

Specific electricity consumption (SEC) for project electrolyzer i under thestandard conditions, 32% NaOH and 90 degrees Celsius is less than threshold
SEC values set in the table below under the standard conditions, 32% NaOH
and 90 degrees Celsius;
CD (Current density) [kA/m2]

Threshold SEC value of theelectrolyzer [kWh(DC)/t-NaOH]

4.0 ≤ CD < 4.52,045

4.5 ≤ CD < 5.02,088

5.0 ≤ CD < 5.52,131

5.5 ≤ CD < 6.02,174

6.0 ≤ CD < 6.52,217

Project specific electricity consumption is derived from specifications basedon initial performance test by manufacturer.

E. Emission Sources and GHG types
Reference emissions

3

JCM_SA_F_PM_ver01.0

Emission sources

GHG types
CO2Electricity consumption by reference electrolyzer

Project emissions
Emission sources

GHG types
CO2Electricity consumption by project electrolyzer

F. Establishment and calculation of reference emissions
F.1. Establishment of reference emissionsReference emissions are calculated by multiplying electricity consumption of projectelectrolyzer and ratio of specific electricity consumption for reference/project electrolyzer, andCO2 emission factor for consumed electricity. The specific electricity consumption of referenceelectrolyzer is conservatively set as a default value in the following manner to ensure net
emission reductions.
All electrolyzers in the chlor-alkali process in Japan employ ion-exchange membrane
technology, and the average of specific electricity consumptions of the electrolyzers is 2,379
kWh (DC)/ton-NaOH (Japan Soda Industry Association, 2014).
The range of averaged specific electricity consumptions of the Bipolar type electrolyzers in EU
is from 2,191 kWh (DC)/t-NaOH to 2,236 kWh(DC)/t-NaOH based on the document “Best
Available Techniques (BAT) Reference Document for the Production of Chlor-alkali, 2014” byassuming general AC/DC efficiency of 96% to 98%.
The operating SECs of the existing bipolar ion-exchange membrane plant in Saudi Arabia werecollected and averaged within the range of current density taking the same current density
ranges as those in the above mentioned document. Accordingly the averaged SEC is calculated
as 2,210 kWh (DC)/t-NaOH.
As a result, it is considered that the electrolyzer at the exiting bipolar ion-exchange membrane
plant in Saudi Arabia has comparable efficiency advantage as it has the efficiency level ofalmost equivalent to the performance of electrolyzers reported in the document published inEU. Hence it is determined to be the reference electrolyzer.
In order to calculate reference emissions, SECs of an initial performance test for the referenceelectrolyzer was collected in order to make it comparable to the SECs of project electrolyzer

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which are also based on an initial performance test.
Considering the fact that the initial performance test is conducted based on production plan ofchlor-alkali and it varies for each plant, as well as that SECs are positively correlated withcurrent density, the reference SECs are set into five range of current densities. The specificelectricity consumptions of the initial performance test value of the electrolyzert is determined
as 2,045, 2,088, 2,131, 2,174 and 2,217 kWh (DC)/ton-NaOH corresponding to the range ofcurrent densities of 4.0, 4.5, 5.0, 5.5 and 6.0 kA/m2 respectively.
F.2. Calculation of reference emissions

ࡾࡱ࢖ = ෍ ࡱ࡯ࡾࡱ,࢏,࢖ × ࡱࡲࢋ࢒ࢋࢉ࢏

REp:

Reference emissions during the period p [tCO2/p]

ECRE,i,p:EFelec:Electricity consumption of the reference electrolyzer iduring the period p [MWh/p]
CO2 emission factor for consumed electricity [tCO2/MWh]The ECRE,i,p is to be calculated by the following equation.

ࡱ࡯ࡾࡱ,࢏,࢖ = ࡱ࡯ࡼ࢐,࢏,࢖ ×
ECPJ,i,p:

SECRE,i,:SECPJ,i,:ࡿࡱ࡯ࡾࡱ,࢏ࡿࡱ࡯ࡼ࢐,࢏

Electricity consumption of the project electrolyzer i during
the period p [MWh/p]
Specific electricity consumption of the referenceelectrolyzer i [kWh(DC)/t-NaOH]
Specific electricity consumption of the project electrolyzer
i [kWh(DC)/t-NaOH]

G. Calculation of project emissions

ࡼࡱ࢖ = ෍ ࡱ࡯ࡼࡶ,࢏,࢖ × ࡱࡲࢋ࢒ࢋࢉܲ‫ܧ‬௣:࢏Project emissions during the period p [tCO2/p]5

JCM_SA_F_PM_ver01.0‫ܥܧ‬௉௃,௜,௣‫ܨܧ‬௘௟௘௖

:Electricity consumption of the project electrolyzer i during theperiod p [MWh/p]:

CO2 emission factor for consumed electricity [tCO2/MWh]H. Calculation of emissions reductions

ERpREpPEp:::

ࡱࡾ࢖ = ࡼࡱ࢖ − ࡾࡱ࢖Emission reduction during the period p [tCO2/p]
Reference emissions during the period p [tCO2/p]
Project emissions during the period p [tCO2/p]

I. Data and parameters fixed ex ante
The source of each data and parameter fixed ex ante is listed as below.
Parameter
SECRE,i,pDescription of data

SourceSpecific electricity consumption of theAdditional informationreference electrolyzer i [kWh (DC)/t-NaOH].

The default SEC values areThe default value is set by the following table.

derived from the initial
performance test value ofexisting electrolyzer which

CD (Current

Default value ofdensity) [kA/m2] of

SEC of theis installed in theperformanceelectrolyzer

chlor-alkali processing plantguarantee by[kWh(DC)/t-NaOH]

in Saudi Arabia.

manufacturer of theThe survey should prove theproject electolyzer

use of clear methodology.

4.0 ≤ CD < 4.5

2,045

The SECRE,i should be

4.5 ≤ CD < 5.0

2,088

revised if necessary from

5.0 ≤ CD < 5.52,131

survey result which is5.5 ≤ CD < 6.0

2,174

conducted by the Joint

6.0 ≤ CD < 6.5

2,217

Committee or project
participants.

SECPJ,i,pSpecific electricity consumption of the projectSpecification of the projectelectrolyzer i [kWh(DC）/t-NaOH].

electrolyzer i prepared for6

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the performance test bymanufacturer
EFelecCO2 emission factor of electricity consumed.

[Grid electricity]

When the project equipment consumes onlyThe

grid electricity or captive electricity, theavailable at the time of

project participant applies the CO2 emission

validation is applied andfactor respectively.

fixed for the monitoring

When the project equipment may consume

period thereafter. The data isboth grid electricity and captive electricity, thesourced from the National

project participant applies the CO2 emission

Committee for the Clean

factor with lower value.

Development

Mechanism(SaudiArabia

DNA forCDM),

unlessotherwise[CO2 emission factor]

mostFor grid electricity: The most recent value instructed

recentbythevalue

Joint

available from the source stated in this table at Committee.
the time of validation[Captive electricity]
For captive electricity, it is determined based

For the option a)on the following options:Specification of the captive
power

generation

systembythea) Calculated from its power generation

provided

efficiency (ηelec [%]) obtained frommanufacturer (ηelec [%]).

manufacturer’s specification

CO2 emission factor of theThe power generation efficiency based on

fossil fuel type used in thelower heating value (LHV) of the captive

captive

power generation system from thesystem (EFfuel [tCO2/GJ])

powergeneration

manufacturer’s specification is applied;‫ܨܧ‬௘௟௘௖ = 3.6 ×100× ‫ܨܧ‬௙௨௘௟ߟ௘௟௘௖

For the option b)
Generatedandsupplied

electricity by the captiveb) Calculated from measured datapower

The power generation efficiency calculated(EGPJ,p [MWh/p]).

from monitored data of the amount of fuel

Fuel amount consumed by

input for power generation (‫ܥܨ‬௉௃,௣ ) and thethe captive power generation

during the monitoring period p is applied. Theweight/p]).

amount of electricity generated (‫ܩܧ‬௉௃,௣ )7generation

systemsystem (FCPJ,p [mass orJCM_SA_F_PM_ver01.0

measurement is conducted with the monitoringNetequipment to which calibration certificate isvalueand(NCVfuel[GJ/massorissued by an entity accredited underweight])

CO2national/international standards;

factor of the fuel (EFfuel‫ܨܧ‬௘௟௘௖ = ‫ܥܨ‬௉௃,௣ × ܰ‫ܸܥ‬௙௨௘௟ × ‫ܨܧ‬௙௨௘௟ ×Where:1‫ܩܧ‬௉௃,௣

calorific[tCO2/GJ])

inemission
orderofpreference:ܰ‫ܸܥ‬௙௨௘௟ : Net calorific value of consumed 1) values provided by thefuel [GJ/mass or weight]

fuel supplier;2)

measurement

Note:

project participants;

In case the captive electricity generation3)

system meets all of the following conditions,default values;

the value of “0.8”* may be applied to ‫ܨܧ‬௘௟௘௖ .

4)

・ The system is non-renewable generation
systemregionalIPCC

bytheornational

default

valuesprovided in table 1.2 and 1.4of Ch.1 Vol.2 of 2006 IPCC

・ Electricity generation capacity of thesystem is less than or equal to 15 MW*The most recent value available from CDM
approved small scale methodology AMS-I.A
at the time of validation is applied.

8Guidelines
GHGonNational

Inventories.

Lower

value is applied.