字幕列表 影片播放 列印英文字幕 For decades, the fear of running out of oil was one of the most recurrent forecasts and at the same time the one that generated the most headlines, alarm and controversy. It was even a course subject or, at least, a warning, even in schools. Do you remember? Perhaps this was largely because the availability of usable energy sources in the past was much more limited than it is today. So much so that, as the bad omens were never fulfilled, the prophecies were postponed again and again and again. One day the long-awaited end of oil would be upon us! ("The world will run out of oil in 10 years." – U.S. Bureau of Mines, in 1914) ("The world will run out of oil in 13 years." – U.S. Department of the Interior, in 1939 and 1950) ("The world will run out of oil and other fossil fuels by 1990." – Paul Ehrlich, The Limits to Growth, in 1972) ("The world will run out of oil in 2030, and other fossil fuels in 2050." – Paul Ehrlich, Beyond the Limit (2002)) As you can see, not a single one nailed it. Of course, what all these people never took into account was the technological evolution that human beings would continue to nurture over the years. And we are not only talking about oil. The fear of running out of an abundant energy source was a constant among journalists, analysts and experts of all kinds. In fact, today when we talk about fossil fuels, what we usually care most about is pollution, but the truth is that for years it was not a question of environmental awareness but of fear, fear of running out of supplies. In any case, the point is that we are in the 21st century and, with the exception of nuclear energy, the whole world seems to be moving towards a future without fossil fuels. The whole world? No, not the whole world! Along the lines of Asterix's village, there is one country populated by unyielding samurai that is resisting against all odds. In recent years, Japan has gone against the global trend. Not only has it not reduced its consumption of fossil fuels, it has actually increased it. You see, 2011 was something of a turning point for Japan. The earthquake and the subsequent tsunami with its devastating effects on the Fukushima nuclear power plant changed the country's approach to energy. If up to that point the Japanese had embraced nuclear power, suddenly things were different. They wanted to look for alternatives. The Fukushima incident resulted in many of the country's nuclear reactors being shut down, a situation that continues to this day. Obviously all that power had to be supplied in some other way. Yes, with renewables but also, initially, with oil and gas, lots and lots of gas. So much so that in 2016, primary energy sources from fossil fuels came to account for more than 90% of all national consumption, In a country with as few usable natural resources as Japan, this meant that more than 80% of its energy needs had to be covered by imports. Japan is one of the most energy-dependent countries in the world. The thing is that it set off all the alarm bells in Tokyo. And it was not just an environmental issue, but also and above all a strategic, economic and geopolitical issue. For a country like Japan to depend entirely on the supply of fossil fuels of foreign origin and brought in by ship is a huge risk to national security. Especially in an era when Xi Jinping has turned geopolitics upside down in this region of the world. For years, Japanese politicians bet on nuclear energy as the best way to gain autonomy. But what happens if you no longer want it or can no longer count on it electorally? Let's just say that nuclear is not exactly the most popular energy source in Japan right now. And precisely for this reason, the Japanese all threw themselves into the development of renewable energies as if there were no tomorrow, especially solar energy. But of course, replacing nuclear energy is a tall order. So the question, the big question on our minds is, what is the solution that the Japanese have put on the table? What exactly have they come up with? Do they have any original ideas? Well, although one of the theories may surprise you, one of the solutions to this whole mess is to become something like the new gas sheiks. Yes, to become major producers at all costs. But there is one problem: they don't have any gas. At least not what we all know as conventional natural gas. And right here, at this point, the time has come to unveil what could become one of Japan's great strategic gambles: methane hydrate. Have you ever heard of this compound? I guess most of you haven't, am I wrong? Well... pay attention because we are going to tell you what it consists of, how you can take advantage of it and what exactly Japan has in mind for it. Listen up. (FLAMMABLE ICE) Yes, you heard it right. We haven't gone crazy. There is an "ice" that if you hold a flame to it, it ignites. It is called methane hydrate and is found in enormous quantities all over the planet. Specifically under the ocean floor. And, take note, because it is precisely its location that makes it one of the most desirable, but at the same time also one of the most controversial raw materials. After all, not only are there unique and fragile ecosystems on the ocean floor, but extracting raw materials from the depths is a risky business. But to understand the importance of this resource, we have to put environmental considerations aside for a moment and focus on its enormous potential, which I think may surprise you. Why? Well, methane hydrate is the most abundant source of carbon on Earth. It accounts for an estimated one-third of all the carbon on the planet. And this is a huge deal, because estimates of global methane hydrate reserves from the US Department of Energy suggest that its energy power could exceed that of all other known fossil fuels. That is precisely why China is also testing the extraction of this resource in the South China Sea. And indeed it is something that Beijing could be taking into account when extending its maritime claims. However, we are talking about a compound that is highly unstable, highly flammable and particularly sensitive to pressure and temperature. These characteristics mean that its extraction is far from being as simple as traditional mining, that is digging, collecting and transporting it to the mainland. So why are we talking about Japan and not other countries when we refer to this flammable ice? Well, take a close look at this map for a better understanding. Each of the green dots refers to known deposits of methane hydrate in the world. As you can see, the highest known concentration of this raw material is located precisely around Japan. The Japanese coastline is literally dotted with deposits of this compound. This is largely due to the confluence of tectonic plates and the huge sedimentary deposits off its coast. So it's not so bad! At least there's something good about being one of the most seismic-prone areas of the planet! Right? Well, you see, in this case the trade-off is that Japan is one of the countries with the largest reserves of methane hydrate on the planet. To give you an idea, the Japanese government estimates that there are at least 24.7 trillion cubic feet, that's 7 trillion cubic meters of methane hydrate in offshore deposits in its territory. That could be enough to meet Japan's entire gas consumption for almost a century. And there could be much more hydrate. Precisely for this reason there is little doubt that methane hydrate extraction could guarantee energy supply for a very, very long time. Obviously not only in Japan. But... let's take a minute, because it's not that simple. The problem is that we still don't know very well how to take advantage of it, in particular how to extract and process it. Well, today there are two ways to do it. One, let's call it conventional, and another, let's say a little more revolutionary, which is what Japan is trying to develop. The traditional way is to extract this resource by drilling into the seabed at depths of about 3,200 feet, that's around 1,000 meters. Keep in mind that the deposits are not in the water itself, but are located several hundred feet below the seabed, which implies additional complexity and such high costs that, at present, this option is not commercially viable. And then there is the more revolutionary way, which is what Japan is working on. Companies like Modec and Mitsubishi Shipbuilding are developing extraction vessels that are capable of safely extracting methane hydrate deposits closer to shore. This would be done by "puncturing" the seabed until reaching the reservoir, and letting the methane hydrate rise to the extractor vessel, which in turn could rely on other auxiliary vessels to transport it to shore or even store it and transform it into methane gas in situ. Seems simple, doesn't it? Well, the truth is that it is not at all. The technical complexity comes above all, as we mentioned before, because of the instability of this resource and also because of the risk of contamination, since, if it is not done properly, high quantities of methane could be released into the sea and then into the atmosphere. And obviously, this is not good either near or far from the coast, but near is even worse. What's more, beyond the risks, the extraction itself is technically complicated. Let's say that during the drilling process there is a risk of sand or anything else entering the reservoir through the borehole, and that could destabilize the methane hydrate to the point of rendering it unusable. Anyway, that's what they're working on. The goal is to get gas, gas and more gas, and make it as cheap as possible for the Japanese. But let's not miss a key detail here: Japan aspires to become a hydrogen-producing powerhouse, producing hydrogen precisely from the gas extracted from methane hydrate deposits. A kind of "Little Red Hen” approach. And as we covered recently in a video about hydrogen – which by the way, I'll link for you in the description – the implications could be enormous. But wait a minute, so long as we are talking about methane hydrate, what on earth is hydrogen doing here? Listen up. (JAPAN'S SPRINGBOARD TO HYDROGEN?) Well, as we told you in the hydrogen video, this fuel can be produced in several different ways. The most common is to produce it using coal, natural gas or, more recently, renewable energies as well. Well, here is the key to Japan's energy intentions: to extract methane hydrate and use it to produce hydrogen. To give you an idea, one cubic meter of methane hydrate can produce approximately 160 cubic meters of methane gas, which can then also be converted into hydrogen. In this way, countries with large methane hydrate deposits, such as Japan, could move very quickly to hydrogen and use it as a clean fuel that is not dependent on imports. In fact, hydrogen is an increasingly important pillar of the Japanese government's energy strategy, which hopes to boost hydrogen consumption to over 20 million tons by 2050. A relatively high target – especially if we take into account that per unit weight the energy output of hydrogen is three times that of gasoline – but one that will only be possible to achieve if production costs can be substantially reduced. Thus, the Japanese government's plan is to reduce the cost of hydrogen production from 100 to 20 yen per cubic meter. That is, from 91 to 18 cents. And to achieve that goal, among other things, the country needs a very competitive energy supply. Potentially methane hydrate. Not only that, but producing hydrogen from methane hydrate gas would be cleaner than from other sources, as methane hydrate emits 30% less carbon dioxide when burned than coal or oil does. The question is, will it be possible to harness methane hydrate on a commercial scale, and will it be economically viable? And then another question to ask is... will the take off of hydrogen accelerate thanks to methane hydrate? (Japan eyes undersea 'fire ice' as source of clean-burning hydrogen - Nikkei Asia) As you can see, this is the energy revolution that Japan is trying to enter. A strategy that would then be complemented by carbon capture technologies. In this way, Japan could achieve enormous energy autonomy. But will it ever be feasible? That is not clear, but for the record, in 2017, the Land of the Rising Sun did manage to extract methane hydrate for 24 days without any technical incident through its experimental project in the Nankai pit. Not only that, the government believes it will be able to get commercial methane hydrate projects off the ground between 2023 and 2027. Or at least that is what its latest Strategic Energy Plan says. So do you think that we should take advantage of the gas that is "dormant" in methane hydrate deposits on a massive scale? Or do you think that this type of extraction should not be carried out under any circumstances due to the environmental risks involved? Leave us your opinion below, in the comments. And as always, if you found this video interesting, don't forget to like and subscribe to Visualpolitik. Once again, thank you for being there. Take care and see you next time.
B1 中級 美國腔 冰甲(Japan's Bet on Energy Independence - VisualPolitik EN) 5 1 joey joey 發佈於 2021 年 08 月 16 日 更多分享 分享 收藏 回報 影片單字