BIOGAS UPGRADING GUIDES
What data do you need to select a biogas upgrading system?
A useful enquiry describes the gas available at the upgrading inlet and the gas required at the outlet. Installed digester capacity alone is not enough. This checklist helps operators prepare a consistent basis for comparing configurations and identifying missing information before detailed engineering.
1. Describe the flow and its variation
State the raw-biogas flow, units and reference conditions. Identify whether the figure is measured, estimated or a future design target. Provide minimum, typical and maximum values, operating hours and any seasonal or feedstock-related variation. A single peak value does not describe the normal operating case.
Keep raw-biogas inlet flow separate from biomethane output. If an analyser or flowmeter report uses a wet basis, say so; do not silently compare it with dry-gas figures. Attach dated measurements where available.
2. Provide a representative gas analysis
Include CH₄, CO₂ and H₂S, with units, sampling date and sampling location. Give ranges as well as typical values when composition changes. Describe the feedstock and any gas treatment already installed upstream. A result taken after an existing treatment stage may not represent untreated digester gas.
Where available, include O₂, N₂, moisture and information on other contaminants. Mark missing measurements as unknown rather than zero. These data help define whether additional treatment or analysis is needed; the checklist is not a universal acceptance specification.
3. Define the outlet requirement
Specify grid injection, transport fuel or on-site use. Share the receiving network or equipment specification, including applicable quality limits and delivery conditions. Methane concentration alone does not establish acceptance: other gas components and connection conditions also matter.
For CarboLoop, optional O₂/N₂ polishing is assessed against the project requirement. It is not automatically part of every configuration, and grid acceptance is not unconditional.
4. Describe the site and both product outlets
Provide the country and site location, available utility information, existing gas interfaces and any known space or access constraints. Indicate planned integration works and the information that still needs to be confirmed.
CarboLoop combines biomethane production with captured CO₂ conversion to liquid potassium carbonate. Indicate whether you plan to manage carbonate use or sales, or wish to discuss the available partner model for supply and off-take. Availability and scope are agreed per project.
5. Separate the standard module from the project design
The published C-300 module basis is 300 Nm³/h of raw biogas in a 40-ft ISO container. Higher total flows can be addressed with modules in parallel; module count is determined from the plant data. The published inlet basis is CH₄ 56%, CO₂ 44% and H₂S ≤300 ppm; higher H₂S is assessed individually.
These figures are a reference basis, not confirmation that any gas stream is acceptable. Performance guarantees apply for an agreed raw-biogas composition. The final scope, optional treatment and site interfaces need project assessment.
6. Send a first enquiry, then resolve the gaps
The calculation form collects raw-biogas flow, CH₄, CO₂, H₂S, location and intended use. Use its message field to explain ranges, existing treatment and missing information. Keep a separate dated gas analysis and the receiving specification ready for technical review.
If only preliminary data exist, label them as estimates. The first useful result is a clear assessment basis and a list of unresolved inputs, not an assumed final guarantee.
Project discussion checklist
| Topic | What to establish |
|---|---|
| Raw biogas | Flow and reference conditions; minimum / typical / maximum |
| Composition | CH₄, CO₂, H₂S; date, units and sample location |
| Additional analysis | O₂/N₂, moisture and other available contaminant data |
| Gas destination | Intended use and receiving specification |
| Site | Location, interfaces, utilities and known constraints |
| Carbonate | Planned handling or interest in the partner model |
Sources and evidence scope
General industry context: IEA Bioenergy. CarboLoop information: published product specification and pilot report. General industry routes are not promised CarboLoop capabilities.