The world's first coke oven gas liquefied natural gas project trial production

The world's first coke oven gas LNG project was successfully tested

Recently, a major milestone was achieved in the energy sector as the world's first project to convert coke oven gas into liquefied natural gas (LNG) successfully completed its trial production. The project, titled "120 million m³/year Coke Oven Gas LNG Project of Inner Mongolia Hengkun Chemical Co., Ltd., affiliated with Xinkuang Inner Mongolia Energy Co., Ltd.," marks a significant breakthrough in the field of cryogenic technology and waste gas utilization.

The project uses a mixed refrigerant process for the cryogenic liquefaction of coke oven gas, which is a novel approach in this industry. This technological innovation was developed and supported by the Institute of Physics and Chemistry, Chinese Academy of Sciences, which provided the design and technical services for the refrigeration process package. This collaboration highlights the growing synergy between scientific research and industrial application.

Inner Mongolia Hengkun Chemical Co., Ltd. is part of a larger development plan that includes several large-scale projects, such as a 5 million tons/year tamping coke facility, a 600,000 tons/year coal tar deep-processing plant, and multiple coke oven gas LNG projects. The first phase of the coking park is already operational, producing 1.3 million tons of rammed coke and 120 million cubic meters of LNG annually.

The process begins with the compression and pretreatment of coke oven gas, followed by desulfurization and methanation. Through this chemical reaction, carbon monoxide and carbon dioxide are converted into methane, which is then cooled and separated through cryogenic liquefaction. The resulting LNG is enriched with hydrogen, making it a cleaner and more efficient energy source. This project not only improves resource utilization but also significantly reduces greenhouse gas emissions.

Once fully operational, the project is expected to extract natural gas from coke oven gas, increasing LNG production by approximately 30%. It will also reduce annual exhaust emissions by 3.2 billion standard cubic meters and save around 100,000 tons of standard coal. These achievements make a meaningful contribution to energy conservation, emission reduction, and the promotion of a circular economy.

The research group at the Institute of Physics and Chemistry has been leading efforts in low-temperature systems for many years, focusing on the comprehensive utilization of various types of waste gases. Their work combines cryogenic technologies with chemical processes to create sustainable solutions for turning waste into valuable resources. They have developed several innovative methods, including unpowered ammonia recovery and oxygenated coalbed methane liquefaction, which are now being applied in both experimental and industrial settings.

Currently, the team is working on the largest domestic and international project for the comprehensive utilization of coke oven gas, further demonstrating China's commitment to green energy and technological advancement. This initiative not only strengthens the country’s energy security but also sets a new benchmark for sustainable development globally.

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