Hydrogen: The Fuel of the Future, But How Do We Get There?
Hydrogen has been hailed as the clean fuel of the future, promising to help decarbonize the global economy. It can be used to produce storable energy with no carbon emissions, and it can replace fossil fuels in hard-to-decarbonize industrial processes like steel and cement production. However, for hydrogen to truly fulfill its potential, two critical challenges must be addressed: producing it cheaply and cleanly, and finding a cost-effective and environmentally friendly way to transport and store it.
The first challenge, producing pure hydrogen cheaply and with low carbon emissions, is being actively researched by scientists worldwide. The second challenge, however, is less discussed but equally important: how to move and store hydrogen efficiently. This is where the MIT Energy Initiative (MITEI) comes in, with a team of researchers led by former MITEI postdocs Gasim Ibrahim and Guiyan Zang, now working at Honeywell and Washington State University, respectively.
The team has developed a tool called the Hydrogen Carrier Analysis Tool (HyCAT) to help address the transportation and storage challenge. HyCAT doesn't consider how the hydrogen is produced or how it's used after delivery; instead, it focuses on determining the costs and carbon emissions incurred during transportation. The tool is easy to use, with a user interface that allows for inputting assumptions and presenting results in simple bar charts.
The researchers looked at three potential hydrogen carriers: toluene, synthetic methane, and ammonia. Each has its advantages and disadvantages. Toluene, for example, is derived from the oil and gas industry, which has a relatively high carbon intensity. Synthetic methane, on the other hand, consumes carbon dioxide, often captured from the atmosphere, but some hydrogen is lost in the process. Ammonia, the most promising option, has a well-established infrastructure for transportation and storage, but the reaction needed to release the hydrogen has not received much attention.
The best path to follow will vary from place to place and situation to situation, the researchers concluded. HyCAT can help decision-makers explore the options available to them, but they should not assume that anything they see in the literature can easily be generalized or extrapolated to their specific conditions. Instead, they should use HyCAT to optimize their supply chains and make clean-burning hydrogen a reality.
Personally, I think this is a fascinating development in the quest for clean energy. The fact that we can now use tools like HyCAT to explore the options for transporting and storing hydrogen is a significant step forward. However, I also think we need to be cautious about the assumptions made in these assessments and the potential for unintended consequences. For example, the use of synthetic methane to capture carbon dioxide from the atmosphere is an interesting concept, but we need to consider the potential impact on the environment and the economy. Overall, I believe that hydrogen has the potential to be a game-changer in the fight against climate change, but we need to proceed with caution and a deep understanding of the challenges involved.
