Biomethane and biohydrogen: the future of energy is here

Biomethane and biohydrogen: the future of energy is here

Both biomethane and biohydrogen are two gases that have been going strong in our current energy landscape. Both have a renewable origin and their formation can be associated with CO2 capture and storage processes, another of the great objectives of our society to fight against global warming.

Biomethane is nothing other than methane with a renewable origin, as opposed to natural gas where methane has a fossil origin. Biomethane is typically generated by purifying the biogas produced in anaerobic digesters that treat waste streams such as sewage sludge, manure or other biodegradable streams. It is the operation generally known as the upgrading process [1]. Biomethane has the added advantage that it is chemically identical to natural gas, so it can be substituted in any of its applications. For this reason, biomethane is expected to play a transcendental role in the decarbonization of the Spanish and European economy with a view to 2050 [2].

If we return form biogas, its other major component is CO2, but there is the possibility of reintroducing this CO2 to the anaerobic digester or treating it in another reactor and, through what is known as the methane process, generating more biomethane [3]. That is, we can use CO2 to generate methane, who gives more? But this process is not as mature as that of conventional anaerobic digestion and, although it has been shown to be technically feasible (more than 100 operating plants are known in Europe), the performance of the process needs to improve so that its economic viability is out of all doubt.

Once we have the biomethane, another option we have is to generate green hydrogen (named for its renewable origin) through a well-known reforming process. The reforming of natural gas to produce hydrogen is a common industrial practice, so reforming biomethane is an entirely plausible option. The usual reforming is carried out by reacting methane with water vapor, but there is already work that has shown the possibility of replacing this water with CO2, so we return to using carbon dioxide as a raw material, removing it from the atmosphere and instead producing the desired hydrogen.

But hydrogen can also have a biological origin, which is what is known as biohydrogen. In nature there are algae and bacteria that generate hydrogen through their metabolic cycles. These organisms, grown in a controlled environment, can also become a biohydrogen factory. In this case, and as it happened in the methanation processes, it has been shown that the processes work and can be scalable, but the yields that are currently achieved remain a barrier to their implementation for industrial purposes.

But that’s what research is for, to keep working and make these processes (and others that we will talk about on another occasion) a reality in the short-medium term.

[1] Hidalgo, D., Sanz-Bedate, S., Martín-Marroquín, J. M., Castro, J., & Antolín, G. (2020). Selective separation of CH4 and CO2 using membrane contactors. Renewable Energy, 150, 935-942.

[2] Elguera, N. M., Salas, M. D. C., Hidalgo, D., Marroquín, J. M., & Antolín, G. (2020). Biometano, el gas verde que pide paso en España. IndustriAmbiente: gestión medioambiental y energética, (30), 50-56.

[3] Hidalgo, D. Martín-Marroquín, J.M. (2020). Power-to-methane, coupling CO2 capture with fuel production: An overview. Renewable and Sustainable Energy Reviews, Volume 132, 110057.

Blockchain for a better planet

Blockchain for a better planet

Blockchain technology has been explained in a previous entry of this Blog, and another entry about Blockchain and the electric market customers is also available. This new entry is again focused on this technology but, in this case, it will be focused on all the opportunities offered by this technology in the environmental and energy sector.

Distributed Ledger Technologies (DLTs from now on) and, in particular, blockchain technology have the potential of transforming the energy sector. The World Economic Forum released a joint report identifying more than 65 blockchain use cases for the environment, including new business models for energy markets and, even more, moving carbon credits or renewable energy certificates onto the blockchain.

Its defining features are its distributed and immutable ledger and advance cryptography, which enable the transfer of a range of assets among parties securely and inexpensively without third-party intermediaries. Blockchain provides a new, decentralized and global computational infrastructure that is transforming many existing processes in business, governance and society, offering many opportunities to address multiple environmental challenges such al climate change, biodiversity loss and water scarcity.

Due to increasing integration of Distributed Energy Resources (DERs), many consumers have become prosumers, who can both generate and consume energy. As generation of DERs can be unpredictable and intermittent, prosumers may decide to store their surplus energy using storage energy devices, or supply others who are in energy deficit. This energy trading is called Peer-to-Peer (P2P) energy trading, and it is a novel paradigm of energy system generation where people can generate their own energy from (Renewable Energy Sources) RES in dwellings, offices and factories, and share it locally with each other. Waste heat and cold can be also traded in a similar way to energy from RES. One of the main contributions of DLTs in the scope of P2P Energy trading is to register all the transactions in a secure and non-mutable way, and to simplify the metering and billing system of the P2P energy trading market.

In the scope of the SO WHAT project, CARTIF has been involved in the definition of the business model linked with the use of Blockchain to exchange waste heat and cold. Besides, CARTIF has worked in a research internal project called OptiGrid which main aim was the development of innovative solutions in the scope of the smart grids. CARTIF is also working in a project called Energy Chain (subcontracted by Alpha Syltec Ingeniería) to jointly develop a platform to allow energy trading between prosumers. Both OptiGrid and Energy Chain are projects financed by the “Instituto de Competitividad e Innovación Empresarial” (ICE) and are focused on the use of blockchain as a driver to deploy platforms devoted to energy trading. In the scope of Energy Chain, Alpha Syltec Ingeniería will also develop machine learning algorithms that will interact with the blockchain platform providing useful data about generation and demand.

The use of blockchain in the scope of SmartCities is clear due to its applicability to transfer information in a secure and immutable way, reducing (and even removing) the amount of intermediaries. Blockchain can be used in multiple ways apart from the aforementioned one: it can push the use of electric vehicle (e.g., P2P Electric Vehicle Charging), it can be used as a driver of public empowerment (e.g., increasing the security level, the transparency and the reliability of elections, online surveys, referenda, etc.)…

Other examples of the use of blockchain is its use as a driver of off-set carbon footprint processes, increasing the transparency and security of the transactions, and its use to improve the traceability and transparency of green energy in relation to the Guarantee of origin (GoO). One example of the use of Blockchain in this sense is ClimateTrade, which main aim is to help companies to achieve carbon neutrality by offering them their carbon offsetting services.

Cities as New York and states as West Virginia have used blockchain to exchange energy or to vote using the mobile phone, Estonia is using it to manage personal data, and Dubai’s Smart City Program has addressed more than 500 blockchain projects that will change the way to interact with the city. Blockchain is a reality, and is here to stay.

From consumer to prosumer

From consumer to prosumer

Most users have been consuming electricity in the same way our entire lives. We simply know that we can plug in the electrical device wqe want at any time, and that, in return, at the end of the month, we get a bill (for many, more difficult to understand than an Egyptian hieroglyph, by the way). But this way of consuming electricity can change very soon (if it hasn´t already). Not for a long time, we can contribute with our own energy to the main grid without many complications, decide when is the best moment for us to consume, or partner with other users to benefit each other…or all these options at the same time.

In other words, the energy sector is moving from a model in which the user had a merely passive role, to a totally different one, where the user can have an active participation in the production, management and consumption of electricity. For this paradigm shift, a new word has emerged as a result of combining producer and consumer: prosumer.

Although the concept of prosumer is now broader, it originally refers to users who produces their own energy for their own consumption, and discharge the surpluses to the electrical network. In this way, not only we can consume less from the grid, but our electricity is also supplied to the main system, and we contribute to achieving a more sustainable model while we reduce our bill.

Given the rise of distributed generation facilities for self-consumption, largely driven by the publication of RD 244/2019 in Spain, it is not surprising that this type of prosumer is the most common. However, the options for prosumers are more and more varied, and are not only limited to installing solar panels on our roof.

For example, the interaction of the user with the main grid can also be more proactive by combining responsible electricity consumption with electricity tariffs which depend on the market price (rates indexed to the electricity pool market-the hourly market-, also called PVPCs tariffs in the case of Spain-stating for Small Consumer Voluntary Price-, for users with a contracted power lower than 10kW).With this type of tariff, every day you can know the hourly price of electricity for the next day, so that if today we are told that tomorrow morning the price of electricity will cost almost 90% less than it costs right now (as happened a few days ago in the Iberian Peninsula(, we can decide if we prefer no to turn on certain appliances today (e.g. washing machine, dryer or dishwasher, in the case of residential consumers), and use them tomorrow, hence getting some savings due to the energy term associated to their consumptions.

But, what happens when there is hardly any sun or wind, and the prices of the electricity market soar to all-time highs, as happened a few weeks ago during the storm Filomena in Spain? In the previous case,basically we would have to ´´ endure the downpour´ and pay it at the end of the month. How ever, if we had energy storage solutions, we could avoid these type of scenarios, and in general we could reduce our consumption from the grid durign periods when the price of energy is high. This prosumer alternative is also very simple: at night or in the morning, when electricity is cheaper, we could program the charging of our energy storage equipment (electric batteries, including our own electric vehicle, but also thrmal systems of thermoelectricc), so that when the price of electricity went up, we would not have to pay its exorbitant costs, but could use our stored energy.

Precisely, this combination of prosumer options– installation of a renewable production system, storage, dynamic rates and active management of our demand- is part of the study that is being considered in the MiniStor Project, where CARTIF has participated since last year. In this project, a thermoelectric storage system that integrates lithium batteries, phase change materials and a thermochemical reactor is being developed, also including hybrid solar panels that produce both heat and electricity and an optimal energy management, considering both the prediction of our consumption, the prediction of our systems production, and the electricicty costs. A very interesting challenge for which we will be able to tell you more about very soon.

As we have seen, the prosumers´ participation options go far beyond having our own self-consumption facility (which is not a small thing), and, although this time we have presented a few, the alternatives where this actor has a fundamental role are almost infinite (demand aggregators, blockchain integration, microgrids, energy communities…) Surely, in a short time others options will emerge, that at the moment we cannot imagine. What is clear, is that the role of prosumers is already considered as decisive, we are at the beginning of what can be a true paradigm shift in the energy sector, and from CARTIF we are on the trail to be leaders in this revolution.

And you, do you want to become a prosumer?

The BIM approach: fitting to Heritage?

The BIM approach: fitting to Heritage?

The BIM approach (Building Information Modelling) is all around Architecture, Engineering and Construction professionals, but when it comes down, very few companies are founding their daily work on this paradigm and applications are really far from being homogeneous. BIM is many times (let’s say “usually”) incorrectly identified as a specific software package or a type of 3D digital model. However, BIM is much more than a newer version of CAD or a 3D visualisation tool.

The BIM approach provides a digital featuring of a building or infrastructure throughout its whole life-cycle, adding extra information to help making better and more-timely decisions upon a 3D model that allows a multidimensional analysis: 4D (evolution); 5D (costs); 6D (sustainability -including energy efficiency-); 7D (maintenance).

Although there is still a lack of knowledge on how BIM and associated digital innovations are applied across European countries, the European Directive 2014/24/EU imposes BIM Level 2 for government centrally procured projects. Level 2 refers a collaborative process of producing federated discipline specific models, consisting of 3D graphical data (those visually represented) and semantic data (those significant additions) as well as associated documentation (for instance: master plans). Information is exchanged using non-proprietary formats, such as Industry Foundation Classes (IFC).

Consequently the built heritage is subject to BIM for the purposes of documentation, conservation and dissemination, but the distinctiveness and sensitivity to meet heritage demands requires technological and methodological particularizations leading to the concept of Heritage-BIM (H-BIM). The purpose of H-BIM is to provide a 3D parametric model as a “container” of information generated all over time by different procedures, by different people, and from different sources (hw & sw). The model would capture the multidisciplinary nature of Heritage, far away from the simplicity and modularity of conventional construction, and would be very useful to study, evaluate the state of conservation and plan interventions on the assets in a profitable way. It is quite a challenge for a sector where digitization is a pending issue.

This technologically means facing many challenges, starting with the minimum amount of graphical and semantic data that would be adequate to support the activities of the sector. Two of the most important are:

  • The combination of 3D data with different types of images (thermography, high resolution photographs or multispectral recordings) to produce a really useful H-BIM model for exhaustive assessment.
  • The photorealistic texturing of 3D models for a rigorous representation of reality.

Both aspects are being worked by CARTIF to decisively help companies, managers and public administrations in the digitization of Cultural Heritage.

Industry 5.0, seriously?

Industry 5.0, seriously?

It seems unbelievable, but 5 years have passed since CARTIF inaugurated the blog with the post on Industry 4.0 in which I analysed some of the keys to the so-called “fourth industrial revolution” and how it could affect the industry in our country. It has always seemed risky to me to try to define this revolution from within itself. I suppose that time and the historical perspective will make it clearer if it really has been a revolution or simply a technological mantra. Fasten your seat belts because if we have not yet assimilated this revolution now they “threaten” us with the next one, Industry 5.0, they call it. Original, isn’t it?

If the fourth promised to interconnect the productive means of the entire value chain to make a transition to the intelligent industry or Smart Industry (everything has to be Smart as when many years ago any self-respecting appliance needed to carry “fuzzy logic” on-board). The fifth industrial revolution tries to humanize the concept beyond just producing goods and services for economic profit. The challenge of this revolution is to include social and environmental considerations in its purpose. Keywords if this revolution, as defined by the European Commission, should include human-centric approach, sustainability and resilience.

By developing innovative technologies with a human-centric approach, Industry 5.0 can support and empower workers, rather than replace them. Likewise, other approaches complement this vision from the consumer’s point of view in such a way that they can have access to products that are as personalized as possible or adapted to their possibilities. Thus, concepts such as personalized food or tailor-made clothing could be virtually applied to any consumer product.

The sustainability in the development of the industry needs to reconcile the economic and environmental progress objectives. To achieve such common environmental objectives, it is necessary to incorporate new technologies and integrate existing ones by rethinking the manufacturing processes by introducing environmental impacts in their design and operation. Industry must be a leading example in the green transition.

Industry resilience means developing a greater degree of robustness in its production, preparing it against disruptions and ensuring that it can respond in times of crisis such as the COVID-19 pandemic. The current approach to globalized production has shown great fragility during the pandemic that devastates us. Supply chains must also be sufficiently resilient, with adaptable and flexible production capacity, especially in those aspects of products that satisfy basic human needs, such as healthcare or security.

Just as the fourth needed digital enablers, this new revolution needs technological aspects to make it happen. From a practical point of view, we can say that the enablers we reviewed a while ago are fully up-ot-date for Industry 5.0. We could include some additional ones such as quantum computing or block-chain, incipient ones 4 or 5 years ago. If the enablers are similar, why are we talking about a new revolution? It is a matter of priorities. If the fourth spoke abou hyper-connection of processes to the digital world through cyber-physical systems or the IoT, in the fifth, a cooperation between human and digital technology is sought, either in the form of collaborative industrial robots, social robots or artificial intelligence systems that complement or assist in any task related to production, from installing a door in a car to deciding how to organize the next work shift to meet the productivity goal of the manufacturing plant.

Attention: NutriScore Traffic Light! We have a huge mess

Attention: NutriScore Traffic Light! We have a huge mess

NutriScore, is a nutritional traffic light intended to help consumers make healthier buying decisions by providing information on nutritional quality at a glance. It does this by using a algorithm that gives a lower (healthier) score for protein, fibre, fruit, nuts and vegetables and a higher (less healthy) score for kilocalories, saturated fat, total sugars and salt. Based on this score, the product is given a letter with the corresponding colour code, from the healthiest which would be green (letter A) to the least healthful which would be indicated by the colour red (letter E).

But not everything is perfect in the world of the colourful algorithm. Since its birth in France (2017), it has been the subject of numerous criticisms arguing that the NutriScore not only fails to meet the objectives for which it was created but is even misleading for consumers. As expected, we are facing a divided Europe. On the one hand, the governments of France, the Netherlands, Switzerland, Belgium, Luxembourg and Germany have adopted the Nutriscore label on a voluntary basis. However, Italy considers that such labelling poses a risk to products “made in Italy” and to the Mediterranean diet, and has even presented to the Commission an alternative to NutriScore called NutrInform (which has also been widely criticised). Major food multinationals such as Nestlé, Kellogg’s and Danone have already implemented NutriScore in their own brand lines and some of the largest retail chains such as Carrefour, Erosky, Aldi and Lidl have also included NutriScore in their own brand products.

The pro-NutriScore group argues that it is an easily interpreted tool that can encourage healthy food choices and motivate industry to reformulate its products. By contrast, another group sees the NutriScore as an unfair system, which may discriminate against certain categories of food, as it does not include comprehensive nutrient information and is not based on the reference intakes of the average consumer, leading to an unbalanced diet.

The NutriScore also fails to convince the European Commission. In fact, in its Farm to Fork strategy published in March 2020, the Commission faces the challenge of implementing a single mandatory labelling system across the EU, by the last quarter of 2022, but has so far not committed itself to the NutriScore. In fact, it has proposed to launch an impact study on the different types of front of pack labelling.

Despite all this variety of opinions, today the NutriScore is one of the most widely accepted front labels in Europe and the one chosen by Spain for implementation during the first quarter of 2021.

In this situation we must not forget that the most important thing is to inform (not influence) the consumer. This situation is reminding me of what happened with Regulation 1924/2006 whose initial objective was also very worthy, as it was published to protect consumers on nutrition and health claims on food. That was a Regulation under strong pressure from the food industry which did not take the consumer into account. In fact, to this day, consumers are still not aware of the difference between a “fat-free”, “low-fat” or “reduced-fat” product, to name just one example. It was a regulation made “for” and “by” the food industry and which in my opinion has not guaranteed consumer protection either. At the very least, the NutriScore would expose a regulation that is allowing a fried roll filled with vitamin D enriched cream to claim that it “contributes to the normal functioning of the immune system”. However, the NutriScore is also being used as a marketing tool by the food industry, and the algorithm has even been modified to improve the rating of certain products.

One of the main criticisms of NutriScore is that products with low nutritional value may give the impression of being healthy after reformulation. In my opinion, the NutriScore would actually be continuing a situation that Regulation 1924/2006 has not been able to resolve. We should focus on health policies by reformulating those products with too much salt, saturated fat and sugar so that consumers can actually make healthier choices.

We already know that NutriScore is not perfect, in fact no labelling system will ever be perfect in isolation. In parallel, complementary nutrition information systems will need to be put in place. Nutrition education will of course be essential for any labelling system to be effective, but here the food industry really needs to lose its fear of being more transparent. Marketing departments must understand that including “sodium palmitate” (Latin name) or “elaeis guineensis” (name of the plant) as an ingredient instead of “palm oil” is not transparent and can confuse even a PhD in nutrition.

In the food area of CARTIF during 2021 we are preparing business initiatives related to the improvement of the nutritional profile of certain foods and actions aimed at improving nutritional labelling so that consumers can make more informed choices.