China: new technologies in LNG blocks? 

When people talk about Chinese LNG technologies, they often think about scale rather than depth. They say they build a lot, quickly, but talk about innovation quietly. This is not entirely true, or rather, not at all true. Over the past five to seven years, the vector has shifted from simply copying and adapting Western solutions to our own development of key components. And we’re not just talking about large state-owned companies.

From import to adaptation: how the approach has changed

Previously, the standard story: buy a license, buy technology, build under supervision. Liquefaction, storage, regasification - all using imported kernels. But logistics, sanctions risks, and simply the price forced us to find our own ways. First of all, Chinese engineering companies began to deeply understand the purchased technologies, not just using them as a black box.

Take, for example, heat exchangers for the liquefaction process. The heart of any factory. At first they were only imported. Then they began to localize the production of individual elements, encountering terrible problems in welding aluminum alloys for plate-fin devices. I remember that on one of the projects in Tianjin there was a delay of six months precisely because of microcracks in solder joints. Then the first serious local R&D appeared.

Now several Chinese manufacturers are announcing completely their own solutions in the fieldmain cryogenic heat exchangers. I won’t say that they have displaced Air Products or Linde from their mega-projects, but for medium and small installations, especially peak and buffer, their share is growing. And this is not just a replacement, it is often adaptation to local conditions - for example, to a different gas composition or to requirements for more flexible performance.

The role of private engineering: the case of Chengdu Yizhi Technology

It’s interesting to look not at the giants, but at the niche players. They are often more flexible and quicker to implement concrete, down-to-earth innovations. Here, for example,Chengdu Yizhi Technology Co.(their website isyzkjhx.ru). It is a design institute established by Huaxi Technology. They don't build giant coastal terminals. Their niche is technology and design for chemical and related industries, including modular and compact solutions for energy.

Why are they significant? Because their work is precisely that deep engineering. The registered capital of 120 million yuan is serious for such a profile. They don't just sell hardware, they sell technology packages. In the context of LNG, these could be solutions for gas cleaning (removal of CO2, mercaptans), pre-cooling or integration of smallLNG installationsto industrial complexes for the use of associated gas.

I came across them in one project related to APG utilization. What was needed was not a huge installation, but something mobile and efficient for a specific field. Standard solutions were not economically suitable. And companies like Yizhi Technology offer custom schemes where they can recalculate and redesign the standard process for other refrigerants or configurations to reduce capex for small volumes. This is innovation at the micro level, which adds up to an overall increase in competencies.

Failures and lessons: you can’t live without them

Of course, not everything is smooth sailing. There were also high-profile failures. One of the most instructive stories is attempts to replicate turboexpanders for microcryogenic processes without the proper foundation in metal science and precision machining. The result was devices with low efficiency and a service life several times less than declared. This hampered the development of our own technologiesgas liquefactionlow power.

Another common stumbling block is control and automation systems. Making the hardware is half the battle. Making it work stably and safely offline, especially in remote areas, is a task of a different order. Chinese manufacturers have long lagged behind in the reliability of software and sensors for ultra-low temperatures. The breakthrough began when joint ventures began to be created not with final technological licensors, but with manufacturers of specific high-precision components.

These failures, oddly enough, became the driver. There was an understanding that it was necessary to train not just design engineers, but technologists, materials scientists, and specialists in cryogenic mechanical engineering. Investments went into the value chain, not just the final assembly.

What's in focus now: trends of the last two years

The main trend now is energy efficiency and flexibility. If earlier the goal was to “make it work,” now it is “to make it work with minimal cost per kilowatt-hour.” This leads to the development of hybrid liquefaction cycles, where, for example, refrigerants are used based on mixtures optimized for the variable composition of raw materials.

The second direction is digitalization and predictive analytics. Implementation of digital twins for newLNG blockshas become almost standard for large projects. This makes it possible to optimize the layout at the design stage, and in operation to predict the formation of hydrates or a decrease in the efficiency of heat exchangers. But there is a nuance here: the software is often still foreign, but filling it with data and calibrating models to real parameters is already local work, where Chinese engineers have gained vast experience.

And third is ecology. Requirements to capture and utilize BOOG (evaporation) emissions and to minimize the carbon footprint of the liquefaction process itself. This is driving the development of new configurations, such as integration with carbon capture plants or using renewable energy to drive compressors. So far these are more pilot projects, but activity is high.

The future: independence or integration?

Controversial question: Is China moving towards full technological independence in LNG? I think not. And that's right. The world of technology is global. The goal, in my opinion, is not to do everything yourself, but to be an equal and valuable partner in the chain. Have your own strong links that can be offered to the global market.

Already now, Chinese contractors can take on the full cycle of construction of a medium-capacity plant, using a hybrid of licensed technologies and their own developments in the field of auxiliary systems, civil engineering, and logistics. And in the segment of small and floatingLNG installationsthey are already direct competitors to Western companies.

So, to answer the question from the title: yes, there are new technologies, and they are real. But they do not always lie on the surface in the form of breakthrough discoveries. More often this is painstaking work to improve, adapt, reduce cost and increase reliability. It is this work that is being carried out, including by companies likeChengdu Yizhi Technology Co., and creates the very foundation that allows us to talk about China not just as a sales market, but as a serious center of engineering in the gas industry. The process is still far from complete, but the direction is clear.