Les étapes clés d'un
projet de production de
méthane de
synthèse à partir de
pyrogazéification
Key steps in a Biomass
pyrogasification to
methane project
Biomass-to-Methane, Power-to-H2, Hydrogen-to-Methane
Biomass to Methane
Biomass Renewable power
Anaerobic digestion Thermochemical Electrolysis
(dry, wet) proceses (AEL, PEM, AEM)
Biogas Synthesis gas
CH4/CO2 H2
H2/CO/CO2/CH4 Biogas
CO2/CH4
Gas upgrading Syngas cleaning Methanation
(Amine, Membrane) (catalytic, biological) CO2
Carbon
CH4 CH4 dioxide
Gasgrid, LNG, etc.
© Hitachi Zosen Inova RG Präsentation Juli 2022
Methanation basics
Thermodynamic reaction
𝐶𝑂2 + 4𝐻2 → 𝐶𝐻4 + 2𝐻2 𝑂 Steam
CO2 + H2
1 mol of CO2 4 mols of H2
1200 Nm3/h of CO2 4800 Nm3/h of H2
Exothermic reaction producing heat (steam) and CH4 Steam
=> Calorific value of CH4 vs. Calorific value of H2 * 4
With calorific values of
H2 = 3 kWh/Nm3 (LHV) Water
CH4 ~ 10 kWh/Nm3 (LHV)
Thermodynamic energy conversion (if no heat recovery):
µ ~ 10 / (4*3) ~ 83% (LHV) SNG
(~78%HHV)
Biomass to Methane projects:
Challenges to consider
For economic feasibility:
Long-term supply contracts
Which products:
BioChar
Methane
LBG
CO2
For technical feasibility:
Catalysts used in catalytic methanation are very sensitive to impurities
The quality of syngas
The design of the syngas ultra-purification process
The maturity level of pyro-gasification technologies
The quality of the feedstock (virgin wood, A wood, B wood…)
Quality & Stability
Feedstrock Supply & Logistics
Conditions for success
An alignment of 3 planets:
+ Methanation Syngas Pyro-gasification Biomass
Technology Ultra-Cleaning Technology
from HZI
(Catalytic or
Biological)
HZI involvment in Biomass to Methane projects
Different options proposed:
Option 1: EP supply of Pythia6000 (complete methanation tower) + membrane
purification-
Option 2: EP supply of syngas cleaning + Pythia6000 + membrane purification
Option 3: EPC supply of syngas cleaning + Pythia6000 + membrane purification
Options 2 and 3 are subject to chargeable studies, generally as follows:
Feasibility + pre-FEED then FEED
Or pre-FEED then FEED
Pre-FEED main outcome is a non binding budgetary offer
FEED main outcome is a binding EP or EPC offer
Name of Presentation 6
Key steps
The first step is to choose the gasification technology
…
Several selection criteria
The 1st : the quality of the syngas
Test campaign to be carried out with the future
biomass
Accurate measurement by impurity sampling
(detection, sampling method)
… before launching the technical feasibility study of the
complete installation
Pre-FEED
FEED
Allotment: a seemingly promising idea, but in reality,
not very effective
Maximizing energy efficiency requires energy
integration of the entire facility
Typical project schedule involving pre-Feed and Feed
Typical process steps of a
Biomass Gasification to Syngas to Methane project
Balance of Plant
Biomass Syngas SNG SNG
Gasification WGS CO2 Sep Methanation
handling Cleaning Upgrading Injection
Balance of Plant
Biomass Syngas Syngas CO2 SNG SNG
Gasification
handling Cleaning Methanation Scrubbing Upgrading Injection
Gasifier Lines Unit Syngas Cleaning Unit Methanation Unit
HZI Catalytic Methanation standard turn-key plant: Pythia6000
Methane purity > 96 % (gas purification
as add-on)
HZI Catalytic Methanation standard turn-key plant: Pythia6000
At the heart of Power to gas plant Compact design Modular design
• Optimised heat & water integration reduced erection cost
Reliability and low opex Industrial proven proprietary
• One step methanation, robust reactor technology & Catalyst
temperature control
• Minimum moving parts
• Minimum electrical consumption
• No oil cooling (improved safety and
recuced maintenance)
• Gravity flow
• High temperature heat extraction
• Demineralised water and high- Hitz R&D
pressure steam as by-products center
Thank you !
