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Carbon capture

Technological systems aimed at reducing
industrial CO2 emissions by capturing and storing it
for future use

capture technology
We take it a step further by adding carbon capture to turn emission-neutral systems into negative-emission ones.

In a context of increasing climate demands and a transforming energy model, carbon capture and utilization (CCU) is emerging as a strategic solution to reduce emissions from carbon-intensive industrial sectors. Especially when dealing with biogenic CO₂ — captured after the combustion of renewable biomass — we are talking about a technology capable of generating a net negative climate impact.

At ENSO, we have spent years integrating advanced carbon capture, purification, and valorization solutions into our energy projects. Our Garray plant (Soria) was the first biomass facility in Spain to incorporate biogenic CO₂ capture technologies under real operating conditions, setting a precedent for the industrial use of this technology.

Thanks to our experience and engineering capabilities, we are ready to support industry on its path toward climate neutrality, offering solutions that capture CO₂ at the source, purify it, and allocate it for industrial uses. Each of our projects is conceived from a systemic vision: integrating renewable energy, circular economy, and territorial commitment to create real and lasting value. We are committed to solutions that regenerate ecosystems, strengthen communities, and contribute to collective well-being.

integration of systems
Adding innovation to cogeneration systems
At ENSO, we have developed a pioneering proposal for the capture and utilization of biogenic CO₂ from bioenergy facilities. Our model integrates carbon capture technology directly into high-efficiency cogeneration systems, harnessing residual heat from the process to optimize the overall energy performance and minimize environmental impact. CO₂ capture is carried out through mature and scalable technologies — such as amine or carbonate absorption — achieving capture rates above 95%, with low energy consumption and full adaptability to biomass boiler operation.
These types of solutions achieve their highest efficiency in biomass facilities, where the CO₂ emitted during combustion comes from renewable sources previously captured from the atmosphere. By capturing this biogenic CO₂, the system not only avoids new emissions but can even become a net carbon sink. This ability to transform an energy process into one that is climate-neutral or even climate-negative positions bioenergy with carbon capture as a key tool in emerging deep-decarbonization models.
At ENSO, we work with a set of carbon capture technologies that have already reached a high level of maturity
energy services
At ENSO, we do not promote a single technology — instead, we adapt the optimal solution to each case, based on the characteristics of the plant, sustainability objectives, and the intended uses of the captured CO₂.

Amine-based absorption capture

We cover the entire lifecycle of the energy project: from the initial study and identification of decarbonization opportunities to the engineering, construction, operation, and maintenance of the plant. This comprehensive approach ensures technical consistency, traceability, and control at every stage of the project. In addition, we get involved from the design phase with future operation in mind, resulting in facilities that are more reliable, profitable, and ready to evolve alongside the client.

Carbonate-based capture solutions

A safe and stable alternative based on the use of aqueous carbonate solutions, which enables CO₂ capture with optimized energy consumption. It is particularly suitable for facilities with available residual heat or those requiring less aggressive technologies from an operational standpoint. This option facilitates integration with thermal recovery systems or district heating networks.

Cryogenic capture and hybrid technologies

Solutions based on cryogenic cooling combined with pressure separation processes enable clean CO₂ capture without the use of steam, making them ideal for certain industrial contexts. Although they require electrical energy, they offer a high degree of purity of the captured CO₂ and simple operation. They are particularly attractive for plants where there is not enough thermal availability for conventional technologies.
Amine-based absorption capture
Carbonate-based capture solutions
Cryogenic capture and hybrid technologies

Synthesis of sustainable
synthetic fuels (e-fuels)

The captured CO₂ can be combined with green hydrogen (produced through electrolysis using renewable electricity) to generate synthetic fuels such as e-methanol, synthetic methane, or SAF (Sustainable Aviation Fuel). These fuels are particularly useful in hard-to-electrify sectors such as maritime transport and aviation, as they can be integrated into existing logistics and distribution infrastructure without the need for radical technological changes.

In fact, it is estimated that with current technologies, the conversion of biogenic CO₂ into e-fuels could cover up to 28% of transport fuel consumption in the EU, based on the production potential identified for 2030.

Production of materials and chemicals

Captured biogenic CO₂ can serve as a key input in sustainable chemistry processes, transforming into high-value chemicals through catalytic or biotechnological pathways. Among the most relevant compounds is methanol, used as a raw material in the production of fuels, solvents, plastics, and resins — as well as an energy carrier for mobile and stationary applications.

Other compounds derived from CO₂ include carbonates, such as dimethyl carbonate (DMC), and CO₂-based polymers like polyurethanes or polycarbonates, which are emerging as sustainable solutions in the materials sector.

Key actions:
  • Standardized monitoring of safety indicators (accident frequency rate per 100,000 hours worked).
  • Setting emission reduction targets (Scopes 1, 2, and, where possible, 3).
  • Implementing progressive and viable decarbonization plans.
  • Prioritizing concrete actions over mere emission offsetting.

Associated SDGs:
  • SDG 7: Affordable and clean energy (7.2)
  • SDG 13: Climate action (13.2)

Traditional uses and the food industry

Although they represent a smaller volume in absolute terms, the traditional uses of CO₂ continue to have great operational and commercial relevance, especially in sectors such as food and pharmaceuticals, where a high degree of purity and traceability is required.

CO₂ is widely used in the carbonation of beverages (soft drinks, sparkling water), and in modified atmosphere systems to extend the shelf life of fresh products such as fruits, vegetables, cheeses, or bakery items, by controlling microbial growth and slowing down ripening. It is also essential in cold storage and refrigeration logistics, where it serves as a natural refrigerant in transcritical or subcritical compression systems, offering a lower climate impact than traditional HFCs.

Key actions:

  • Establishing clear priorities in diversity management.
  • Monitoring women’s representation on the board, in senior management, new hires, and total workforce.
  • Regular review of equality and opportunity policies.

Associated SDGs:

  • SDG 5: Gender equality (5.5)
  • SDG 10: Reduced inequalities (10.2)
Our ESG objectives