Is China a major exporter of hydrogen from coke oven gas? 

I often see this question in discussions, and it always makes me smile a little. Because the wording already contains a common misconception - as if there is some kind of single, massive “export of hydrogen?” as finished goods in cylinders or pipelines. In reality, everything is much more subtle and, frankly, dirtier. My practice is related to projects for the utilization of associated gases, including coke gas, at several metallurgical plants in China and attempts to enter foreign markets with technologies, in particular, the CIS. So I’ll say right away: China is not a “major exporter?” in the classical sense, but rather a powerful testing ground for technologies and a provider of solutions for producing hydrogen from what was previously simply burned or poorly disposed of. And this is where the real story begins, not the headlines.

From raw materials to technology: where does “export” actually lie?

When they talk abouthydrogen from coke oven gas, many immediately imagine huge tankers. The reality is more prosaic. The main product that China can ?export? in this area, it is not the gas itself, but entire technological chains, engineering and equipment for its extraction and use. Coke oven gas at coke plants is not a pure substance. In addition to hydrogen (55-60%), there is a lot of everything: methane, carbon monoxide, sulfur impurities, naphthalene oils. The goal is not just to obtain H2, but to do it cost-effectively, safely, and with consideration for further use.

For example, at one of the projects in Hebei Province, we implemented a heat-less pressure-cycle adsorption (PSA) system to release high-purity hydrogen. The goal was not export, but supply to a neighboring ammonia production plant. But during the debugging process we encountered a wild problem - fluctuations in the pressure and composition of the source gas due to outdated coke oven batteries. It was necessary to design a buffer system and additional stages of purification from aromatic hydrocarbons, which “killed” adsorbent. This experience, gained with blood and sweat, is that invisible export asset.

It is precisely such developments, and not hydrogen cylinders, that foreign partners are looking for. For example, to modernize old metallurgical or coke production facilities in countries where this industry still exists. The question there is often not so much about clean hydrogen for the energy future, but about saving resources, meeting environmental regulations and obtaining a valuable by-product from waste. This is where Chinese engineering companies that have gone this route have a serious advantage.

Practical barriers and pitfalls logistics

Let’s say the technology exists, and a partner abroad wants not just a project, but the supply of hydrogen. Here we run into the main stumbling block - logistics. Liquefying hydrogen or transporting it through pipelines over thousands of kilometers is fantastically expensive and complex. It is economically justified only within the framework of very large and long-term contracts, often in conjunction with other products.

I was involved in preliminary calculations for a potential project in Kazakhstan. We considered the option of supplying compressed hydrogen in pipe trailers from a plant in Western China. The numbers killed the project in the bud: the cost of transportation exceeded the cost of produced gas several times, not to mention the risks and delivery times. This was a valuable lesson: without creating local production or deep processing at the site of raw material extraction (for example, coke oven gas), talk about large-scale exports is talk in vain.

So now the focus has shifted. ?Export? comes in the form of complex solutions: “turnkey”? A hydrogen purification and separation plant is being built directly at the customer’s site, which itself is a coke oven gas producer. China supplies the technological package, key equipment (compressors, adsorbers, control systems), and trains personnel. And the product - hydrogen - is consumed locally for the needs of chemical synthesis, metallurgy, or even refueling vehicles. This is a modern, pragmatic model.

The role of engineering: a real-life example

To make it clearer, I’ll tell you about a specific case, not ours, but well known in circles. It's about workChengdu Yizhi Technology Co.(a subsidiary of Huaxi Technology). Their website (yzkjhx.ru) is aimed at the Russian-speaking market, which already says a lot. This company is a typical example of the “technology exporter” I am talking about. They don't carry hydrogen, they carry design solutions.

From what I heard from my colleagues, their strength lies in the deep adaptation of gas separation technologies to a specific, often “non-ideal” one. raw materials of post-Soviet coke production. They have experience working with legacy equipment and specific local code requirements. For example, they can offer a hybrid scheme: preliminary purification of sulfur using one technology, and fine hydrogen separation using another, which allows optimizing capital costs. This is the same “applied” one. value that you won't find in textbooks.

Their model of working throughChengdu Yizhi Technology Co.as a design institute with significant authorized capital allows us to take on large projects for the modernization of entire workshops. In essence, they do not sell equipment in boxes, but a guaranteed output result - a certain volume and purity of hydrogen from the client’s “dirty” hydrogen. coke oven gas. This is the highest aerobatics in our business.

Looking to the future: hydrogen economy or resource efficiency?

There is a lot of buzz around the “hydrogen economy” right now. But in the context of coke oven gas, it seems to me that it is important not to give in to the hype. The main driver for China and for potential importers of Chinese technologies is still resource efficiency and ecology. Hydrogen production is a way to increase the overall profitability of coke production, recycle waste, obtain additional product and reduce the carbon footprint.

I see a niche here. While the infrastructure for global trade in ?green? hydrogen is only being built, there is a huge layer of industry (metallurgy, chemistry) that can and should use “gray” or better yet, ?blue? hydrogen from associated gases. This will have an immediate economic and environmental effect. Chinese companies that have gained experience in their country, where such problems were solved without fail, are becoming natural partners for similar transformations in other industrial regions.

Therefore, returning to the title question. Is China a major exporter of hydrogen from coke oven gas? As a product - no, or not yet in significant quantities. But it certainly is and will remain one of the key exporters of proven, viable and, critically, economically viable technologies for its production. And this “export” much more important because it creates sustainable production locally, rather than being subject to the vagaries of global logistics. This, in my opinion, is the real strategic depth of the issue.