Written By Jaya Pathak
The process of conversion of carbon dioxide into fuel might sound like magic, but is not. It is not free energy. And it by no means is an easy way out to continue burning fossil fuels unscathed. What its worst thing is the industrial effort at trying to recycle a waste molecule that the modern economy has created in obscene quantities and apply it, with clean electricity, to something, again, to produce something useful. The beauty behind such thought speaks itself. Its challenge is all the more.
How CO2 is Converted into Fuel: The Future of Clean Energy Explained
The term CO2 to fuel is prone to exaggeration of two types. One is an invention of the techno-optimists, who talk as though the clever chemists had come up with a method to make the climate risk vanish. The other is the one that is provided by sceptics who reject the entire discipline as a costly laboratory daydream. Neither of the positions is particularly helpful. The truth is more challenging and more business oriented. Carbon dioxide is not the source of the energy that is being extracted by scientists. They are adding external power typically renewable electricity when they are running the carbons uphill to higher value molecules. Otherwise stated, the feedstock is CO2. The power has its source elsewhere.
Such distinction is important since it can make the outcome of the whole enterprise climate valuable or not. In case the electricity consumed in the conversion process is obtained via grids that are heavy coal consumers, the environmental logic will soon become weak. When it is due to plenty of solar, wind, hydro or nuclear power, the calculation starts differing. The same can be said about hydrogen that is usually the key mate in the process. Many comparable CO2-to-fuel chemistry processes require the mix of sequestered carbon dioxide with hydrogen generated in an electrolysis reaction. In other words, in case the hydrogen is not clean, then the fuel is not as virtuous as the brand suggests. It is a company narrative without a disguise: the merit of the services will be the quality of the product.
The science of it is not as mystic as the headlines make it look, but not very easy. The carbon dioxide can be harvested by capturing the industrial gases or at a higher expense directly by the air. After being collected, it can be pumped into electrochemical processes involving the use of catalyst and electricity in order to turn it into carbon monoxide, formic acid, methanol or intermediates. Such intermediates may then be further refined into more complicated fuels. The microbes do some of the refining work in some of the pathways. In others, catalytic reactions that are analogous to the obsolete industrial logic of synthesis gas and fuel-making replace them.
Here is where commercial importance of it comes in. Nor is it to stock any synthetic carbon fuel in every scooter, sedan and city bus. That would be putting a waste of clean electricity. In all places where it is feasible to electrify, battery-electric transport continues to be a more efficient solution. Their actual worth is the areas which are not readily subject to batteries or direct electrification. The most evident example is aviation. Closely following is long-haul shipping. Some industrial operations and chemical feedstocks are in that discussion, as well. This is where one will find the sectors of the economy where the energy density remains to be of greater concern than even ideological cleanliness.
This is the reason why airlines, refiners, industrial gas companies and policymakers continue to go back to this field though the costs are still uncomfortable. The strategic value of a synthetic fuel that is able to fit in the existing engines, turbines, storage facilities and logistics system network is massive. This requires less of the installed base. It provides a roadmap albeit costly in the current world that is to decarbonise liquid-based sectors. This is intuitively known by investors. So are those governments concerned with the energy security. One that will be able to use captured carbon, local renewable energy to produce domestic green hydrogen and green hydrogen to create strategic fuels is not only reducing its emissions but also transforming the dependence. That reasoning is even more precise in a global environment where the supply chains are considered geopolitical tools, instead of impartial plumbing.
However, this is where the seductive story starts to fail. The CO2-to-fuel processes are atrociously energy-consuming. Each step is expensive, is inefficient or requires infrastructure that is not available yet at industrial capacity. Capturing carbon is not free. It is not free to produce green hydrogen. The compression, transportation, conversion and refining and certifying of synthetic fuels is definitely not a free process. The presentation can be intelligent; the balance sheet is impartial. The companies surviving this field will not be those possessing the poorest poetical climatic deck. It will be them that will get access to low-cost clean power, reliable sources of carbon, long-term offtake contracts and a kind of support in their policy strong enough to mitigate risk.
The latter is hardly ever talked candidly about. A lot of these endeavours are still not bankable under the pure market logic. They rely, at any rate during the initial years, on mandates, tax breaks, contracts-derivatives which allow purchasing lower-emission fuel at a premium by a corporate purchaser. So, there is nothing disgraceful about that. The vast majority of shifts in energy start the political framework. Yet it is that it must be not read drunkenly. The business feasibility will come out unbalanced. Others of the plants would be constructed to demonstrate process and not profit. Certain advertisements will grow old. Some ill-advertised businesses will find that laboratory success and industrial reliability are not the neighbouring successes.
India has a real interest in the way this works out, but that this interest is not as naïve as climate rhetoric can express it. The opportunity that the country has does not lie in calling itself an e-fuel superpower, before the economics is in place. It is to observe where its industrial structure can eventually provide a competitive advantage. India already is aggressively entering the renewable power and green hydrogen.
The main feature of early theatre will be the appeal of aviation. There is no plausible time course through which airlines can electrify long-haul fleets. Decarbonisation will also be limited to a few levers, and sustainable aviation fuel, be it based on biomass, waste or carbon-based synthetic pathways will be one of them. In the case of India, where the state of demand in air travel remains underpenetrated and continues to grow as a long-term trend, it is not whether the demand of aviation fuel will increase.
Shipping and refining are a somewhat more complicated case. There are still possibilities of synthetic methanol, e-methane and e-type fuels taking a niche in maritime decarbonisation. Refineries, in the meantime, are already versed in molecules, catalysts and process optimisation; familiarity is an issue. The companies that tend to be the most victorious in this case are not the companies which have the most visionary branding efforts, but those which can help incorporate the new fuel avenues to the already existing industrial prowess. Slogans will not enter the history of clean-energy manufacturing.
What is more alluring with CO2-to-fuel science is the disposition to surrender carbon as a liability. It postulates with appropriate limitations the possibility that carbon can be handled like industrial stock and not simply a waste in the atmosphere. Intellectually that is powerful. But it should not be made into a legal loophole. Optimal utilization of the fuels produced out of CO2 is not to conserve all the existing combustion practices. It is in order to consider satisfying the areas in the economy where substitutes are in limited supply, and where carbon cycle can be narrowed and not merely extended. That is a far limited assertion to what the boosters want.
It will not be the laboratories who create the most seductive slide decks, or the companies that will assure people that they can be carbon guiltless. It is they who will cause the cost to go down, clean the electricity input, ensure demand by the hard-to abuse sectors and demonstrate that industrial recycling could occur without demonstration plants. That is a hard way, and most likely the right one. Their chemistry is wonderful, all right. What chemistry never has done is to make an energy market. Economics is doing so, infrastructure is doing so and credibility is doing so. Carbon can still secure the second life as a fuel.
