# The Anonymous Widower

## UK – Hydrogen To Be Added To Britain’s Gas Supply By 2025

The title of this post, is the same as that of this article on Hydrogen Central.

These are the first three paragraphs.

Hydrogen to be added to Britain’s gas supply by 2025.

Hydrogen is to be pumped into Britain’s main gas pipeline by 2025 as part of a scramble to ditch fossil fuels and move to net zero.

Between 2% and 5% of the fuel flowing through the country’s transmission network will be hydrogen in two years under plans drawn up by National Gas, which owns the pipelines.

Note.

1. The article says that.on a winter’s day, you’ve got seven times more energy going through the gas network than the electricity network.
2. Between 2% and 5% of hydrogen, would be unlikely to mean that appliances, boilers and industrial processes would need to be changed.
3. I suspect that domestic appliances and boilers would just need a good service.
4. HyDeploy has shown that 20 % of hydrogen could be possible.
5. The hydrogen could be added, where the natural gas enters the UK gas network.

The exercise would save a lot of carbon emissions.

How Much Electricity Would Be Needed To Create The Hydrogen?

In The Mathematics Of Blending Twenty Percent Of Hydrogen Into The UK Gas Grid, I calculated the amount of hydrogen that would be needed for 20 %, how much electricity it would need and how much carbon dioxide would not be emitted.

How Much Hydrogen Needs To Be Added?

This page on worldodometer says this about UK gas consumption.

The United Kingdom consumes 2,795,569 million cubic feet (MMcf) of natural gas per year as of the year 2017.

I will now calculate the weight of hydrogen needed to be added.

• 2,795,569 million cubic feet converts to 79161.69851 million cubic metres.
• I will round that to 79161.7 million cubic metres.
• Twenty percent is 15832.34 million cubic metres.
• A cubic metre of hydrogen weighs 0.082 Kg, which gives that in a year 1,298.25188 million kilograms will need to be added to the UK gas supply.

This is 1,298,251.88 tonnes per year, 3,556.85 tonnes per day or 148.2 tonnes per hour.

How Much Electricity Is Needed To Create This Amount Of Hydrogen?

In Can The UK Have A Capacity To Create Five GW Of Green Hydrogen?, I said the following.

Ryze Hydrogen are building the Herne Bay electrolyser.

• It will consume 23 MW of solar and wind power.
• It will produce ten tonnes of hydrogen per day.

The electrolyser will consume 552 MWh to produce ten tonnes of hydrogen, so creating one tonne of hydrogen needs 55.2 MWh of electricity.

To create 148.2 tonnes per hour of hydrogen would need 8,180.64 MW of electricity or just under 8.2 GW.

How Much Carbon Dioxide Would Be Saved?

This page on the Engineering Toolbox is entitled Combustion Of Fuels – Carbon Dioxide Emission and it gives a list of how much carbon dioxide is emitted, when a fuel is burned.

For each Kg of these fuels, the following Kg of carbon dioxide will be released on combustion.

• Methane – 2.75
• Gasoline – 3.30
• Kerosene – 3.00
• Diesel – 3.15
• Bituminous coal – 2.38
• Lignite 1.10
• Wood – 1.83

Engineering Toolbox seems a very useful web site.

I will now calculate how much carbon dioxide would be saved.

• In 2017, UK methane consumption was 79161.7 million cubic metres.
• One cubic metre of methane weighs 0.554 Kg.
• The total weight of methane used is 43,855,581.8 tonnes.
• Multiplying by 2.75 shows that 120,602,849.95 tonnes of carbon dioxide will be produced.

As twenty percent will be replaced by hydrogen, carbon dioxide emission savings will be 6,030,142.498 tonnes.

That seems a good saving, from a small country like the UK.

The UK would also reduce natural gas consumption by twenty percent or 15832.34 million cubic metres per year.

How Much Electricity Would Be Needed To Create The Hydrogen for a 5 % Blend?

I’ll now repeat the calculation for a 5 % blend,

How Much Hydrogen Needs To Be Added?

I will now calculate the weight of hydrogen needed to be added.

• UK gas consumption rounds to 79161.7 million cubic metres.
• Five percent is 3958.085 million cubic metres.
• A cubic metre of hydrogen weighs 0.082 Kg, which gives that in a year 324.56297 million kilograms will need to be added to the UK gas supply.

This is 324,563 tonnes per year, 889.21 tonnes per day or 37 tonnes per hour.

How Much Electricity Is Needed To Create This Amount Of Hydrogen?

Earlier I said this.

The electrolyser will consume 552 MWh to produce ten tonnes of hydrogen, so creating one tonne of hydrogen needs 55.2 MWh of electricity.

To create 37 tonnes per hour of hydrogen would need 2,045.16 MW of electricity or just over 2 GW.

How Much Carbon Dioxide Would Be Saved?

Earlier, I found that a Kg of methane will produce 2.75 Kg of carbon dioxide on combustion.

I will now calculate how much carbon dioxide would be saved.

• In 2017, UK methane consumption was 79161.7 million cubic metres.
• One cubic metre of methane weighs 0.554 Kg.
• The total weight of methane used is 43,855,581.8 tonnes.
• Multiplying by 2.75 shows that 120,602,849.95 tonnes of carbon dioxide will be produced.

As five percent will be replaced by hydrogen, carbon dioxide emission savings will be 6030,142.4975 tonnes.

The UK would also reduce natural gas consumption by five percent or 3958.085 million cubic metres per year.

How Much Electricity Would Be Needed To Create The Hydrogen for a 2 % Blend?

I’ll now repeat the calculation for a 2 % blend,

How Much Hydrogen Needs To Be Added?

I will now calculate the weight of hydrogen needed to be added.

• UK gas consumption rounds to 79161.7 million cubic metres.
• Two percent is 1,583.234 million cubic metres.
• A cubic metre of hydrogen weighs 0.082 Kg, which gives that in a year 129.825 million kilograms will need to be added to the UK gas supply.

This is 129,825 tonnes per year, 355.68 tonnes per day or 14.8 tonnes per hour.

How Much Electricity Is Needed To Create This Amount Of Hydrogen?

Earlier I said this.

The electrolyser will consume 552 MWh to produce ten tonnes of hydrogen, so creating one tonne of hydrogen needs 55.2 MWh of electricity.

To create 14.8 tonnes per hour of hydrogen would need 817 MW of electricity or not even a GW.

How Much Carbon Dioxide Would Be Saved?

Earlier, I found that a Kg of methane will produce 2.75 Kg of carbon dioxide on combustion.

I will now calculate how much carbon dioxide would be saved.

• In 2017, UK methane consumption was 79161.7 million cubic metres.
• One cubic metre of methane weighs 0.554 Kg.
• The total weight of methane used is 43,855,581.8 tonnes.
• Multiplying by 2.75 shows that 120,602,849.95 tonnes of carbon dioxide will be produced.

As two percent will be replaced by hydrogen, carbon dioxide emission savings will be 2,412,057 tonnes.

The UK would also reduce natural gas consumption by two percent or 1,583.234 million cubic metres per year.

Summary Of Savings And Electricity Needed

2 %

• Hydrogen To Add – 14.8 tonnes per hour
• Electricity Needed – 817 MW per year
• Carbon Dioxide Savings – 2,412,057 tonnes per year
• Natural Gas Reduction – 1,583.234 million cubic metres per year

5 %

• Hydrogen To Add – 37 tonnes per hour
• Electricity Needed – 2,045.16 MW per year
• Carbon Dioxide Savings – 6,030,142.498 tonnes per year
• Natural Gas Reduction – 3,958.085 million cubic metres per year

20 %

• Hydrogen To Add – 148.2 tonnes per hour
• Electricity Needed – 8,180.64 MW per year
• Carbon Dioxide Savings – 24,120,569.99 tonnes per year
• Natural Gas Reduction – 1,5832.34 million cubic metres per year

February 20, 2023 -

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1. […] I discussed the mathematics of hydrogen blending in UK – Hydrogen To Be Added To Britain’s Gas Supply By 2025. […]

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