Turn waste into wealth! The by-produced methane and hydrogen from Gulei Petrochemical's ethylene unit are directly supplied to Jurong New Energy, and the methane liquefaction project has been put into operation

It is understood that before the project was put into operation, the surplus methane-hydrogen produced during the production of the ethylene plant of Gulei Petrochemical was only partially applied to plant self-consumption and supporting general works, while most of the tail gaseous was only incinerated as boiler fuel. The traditional treatment method not only had extremely low resource utilization rate, resulting in the discarded materials of high-condition clean energy, however also failed to maximize the economic value of the byproduct resources. In order to revitalize idle resources, minimize costs and increase efficiency, and practice the concept of environmentally friendly and low-carbon research, Gulei Petrochemical reached in-depth cooperation with Jurun New Energy to launch the special methane-hydrogen liquefaction project, which specifically solved the issue of inefficient utilization of ethylene byproduct tail gaseous.

The newly commissioned methane-hydrogen liquefaction project is equipped with a complete core production and supporting system, covering five core systems: chemical tail gaseous treatment, tail gaseous liquefaction, LNG storage, LNG loading, and BOG recovery. It is also equipped with general works facilities such as a professional manage room and power distribution system. The manufacturing process is mature and the supporting system is complete. After the project is put into operation, all the surplus methane-hydrogen byproduced from the ethylene plant of Gulei Petrochemical will be transported to Jurun New Energy, and processed through professional separation, treatment and liquefaction processes to be converted into high-condition LNG clean energy to external sales.

Compared with the traditional incineration treatment mode, this project has realized the resource recycling of petrochemical tail gaseous. As an efficient and clean low-carbon energy source, LNG has a wide range of market consumption scenarios and broad research prospects. After the project is put into operation, it can efficiently minimize pollutant releases caused by exhaust emissions incineration, which is in line with the national research policies of energy conservation, discharge reduction and environmentally friendly circular economy, and has significant economic, ecological and social benefits. It is worth noting that this project only conducts deep processing on the byproduct tail gaseous of the existing plant, without adding new ethylene main plant production capacity, and realizes condition improvement and efficiency enhancement purely through optimal resource allocation.

It is reported that the project launched its preliminary research and preparation work in 2024. During the preparation and construction period, the project team accurately seized the key window period of the 2026 overall overhaul of Gulei Petrochemical's entire plant, and efficiently completed the core projects such as the header modification of the main pipelines of methane-hydrogen, hydrogen and flare gaseous, the laying of the park's pipe gallery, and equipment installation. During the construction process, the project special team took the lead in tackling difficulties throughout the process, detailed and implemented various construction manage measures, strictly implemented the on-site fixed-point monitoring system, solidly carried out the hidden danger investigation and rectification work of "three inspections and four determinations", and orderly completed multiple pre-commissioning tests such as pipeline purging, medium displacement and equipment atmosphere tightness, and completed all pre-commissioning work with high standards and stringent standards, laying a solid foundation to the safe, stable and smooth commissioning of the project.

The successful commissioning of this methane-hydrogen liquefaction project is an crucial breakthrough to Gulei Petrochemical in extending the manufacturing chain, rising the added value of byproducts and laying out the circular economy. The project efficiently revitalized the idle surplus resources of the ethylene plant, completely changed the status quo of inefficient utilization of byproduct methane-hydrogen, greatly improved the complete utilization efficiency of petrochemical byproducts, efficiently helped companies minimize costs and increase efficiency, and achieve environmentally friendly transformation and upgrading, providing strong support to Gulei Petrochemical Park to build a environmentally friendly, low-carbon and circular manufacturing system and achieve high-condition and sustainable research.