H2Tech - Q2 2021 - 50

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ADVERTISER INDEX
Global Energy Infrastructure ................................52

H2Tech Solutions .................................................38

Nel Hydrogen US .................................................16

H2Tech ............................................................... 21

InstruCalc ...........................................................37

Technip Energies .................................................. 2

This Index and procedure for securing additional information is provided as a service to H2Tech advertisers and a convenience to our readers. Gulf Energy Information is not responsible for omissions or errors.
HYDROGEN COLOR LEGEND BY H2TECH
Feedstock type

H2 production type

Production technology

Power source/ feedstock

Emissions

Notes

Renewable

Green

Water electrolysis

Renewable electricity

None

Pink

Water electrolysis

Nuclear power

None

Also referred to as clean H2
or carbon-neutral H2

Red

Biomass gasiﬁcation

Forestry and agricultural crops
and residues, animal residues,
municipal solid waste

Low CO2 emissions

Olive

Algal or bacterial
photosynthesis
(via bioreactor)

Green microalgae or cyanobacteria None
provide enzymatic pathways;
water and sunlight provide power

Renewable/
non-renewable

Yellow

Water electrolysis

Mixed-origin grid energy

Low CO2 emissions

Electricity source can be a mix of
renewable power and fossil fuels

Non-renewable

Blue

Methane reforming + CCUS*
Gasiﬁcation + CCUS

Natural gas
Coal

Low CO2 emissions

Also referred to as low-carbon H2

Turquoise

Methane pyrolysis

Natural gas

Solid carbon
byproduct

Gray

Methane reforming

Natural gas

Medium CO2
emissions

Accounts for 70% of present
H2 production
Highly polluting

Brown

Coal gasiﬁcation

Lignite coal

High CO2 emissions

Black

Coal gasiﬁcation

Bituminous coal

High CO2 emissions

White/
Clear

Generated by raising the
temperature of oil reservoirs,
or naturally occurring

Few viable exploitation strategies
exist

Low/no CO2
emissions

*Carbon capture, utilization and storage (CCUS)

50

Q2 2021 | H2-Tech.com

Heat, steam and O2 inputs are
used to convert biomass to H2
in a non-combustion process
Holds promise for future
large-scale, eco-friendly
H2 production

One technology injects O2 into
spent oilﬁelds to generate H2 and
extract it using a downhole ﬁlter
http://www.H2-Tech.com http://www.H2-Tech.com
H2Tech - Q2 2021

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