SIMPLIFIED VIEW OF THE PROCESSES TO PRODUCE RENEWABLE GASES

Methanization

(biological treatment

at 30-50°C)

Agricultural

biomass

Household

waste

Wastewater

treatment

plants

Effluents Biogenic CO

2

Oxygen

Biomethane

T r a n s m i s s i o n o r d i s t r i b u t i o n n e t w o r k

Renewable

hydrogen

Renewable

electricity

Electrolysis

Methanation

(thermal treatment

at 350-430°C)

Purification

Synthetic

methane

Solid or dry

waste

Biodegradable

waste

Liquid or wet

waste

Pyrogasification

(thermal treatment

at 1,000°C)

Hydrogasification

(thermal treatment

at 400-700°C)

Synthetic

gas

Biomethane

Purification

Inputs Processes

Renewable

gases

Biogas

Digestate Biogenic CO

2

Water

Power-to-Gas

Power

plants

IN ADDITIONAL TO METHANIZATION, THREE RENEWABLE GAS PRODUCTION STREAMS WILL PLAY A KEY ROLE

The solutions to produce biomethane by pyrogasification open

the way to the production of biomethane from dry biomass:

in particular, wood and Solid Recovered Fuels (SRF). Dry biomass

represents significant additional volumes to methanization.

The first industrial projects will arrive by 2030 to complete

the production potential of the methanization sector.

For example, ENGIE and its partners are engaged in this development

through the GAYA project, a research and development project

aimed at validating innovative technological choices and preparing

for industrialization of the sector

Solutions to produce biomethane by hydrogasification

Hydrothermal gasification is a technology for conversion of wet

biomass that allows the treatment of residue and organic waste

treatment plant sludge digestates from methanization that

cannot be spread It uses the water contained in the biomass

in its supercritical state as a reaction medium to produce

a methanerich synthetic gas

The French sector for synthetic methane from methanation

of renewable or low-carbon hydrogen is under development

with a number of R&D and demonstration projects (TRL 7-9).

For example, with the Jupiter 1000[4] project, GRTgaz and

its partners aim to implement a synthetic methane production

facility at pre-industrial scale.

This sector enables recycling of biogenic CO

2

, a co-product of the

three sectors discussed above; this recycling improves the sectors’

yield and their environmental performance. This synthetic methane

will then be injected into the gas transmission network

25billion

of investments in Europe

by 2030 for

hydrogen development

Source Market update

380 TWh

of biomethane in Europe

in 2030 with REPowerEU

5800

hydrogen sector jobs in

France in 2022

including approximately

200 at ENGIE

9800

jobs in 2022

in the gas production

sector in France

2023 INTEGRATED REPORT - 97

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