As of March 17, the "DZF-1 reforming pre-hydrogenation catalyst" developed by Daqing Chemical Research Center has been continuously operating on the reforming pre-hydrogenation unit at Daqing Petrochemical Refinery for over seven months. The device calibration results show that compared to the first-generation DZ-1 catalyst, the new version can reduce the reaction temperature by more than 5°C while maintaining high efficiency. Additionally, the sulfur and nitrogen content in the hydrogenated products are both below the target specifications. This performance confirms that the catalyst meets all operational requirements and reaches a domestic advanced level.
Reforming is a key process in producing high-grade clean gasoline. The pre-hydrogenation catalyst plays a vital role in removing impurities such as sulfur, nitrogen, chlorine, and arsenic from the feedstock, preventing poisoning of the reforming catalyst. It ensures stable operation of the reformer and extends the lifespan of the precious metal catalyst used in the reforming process. Since 2002, Daqing Chemical Research Center has been dedicated to the development of this type of catalyst. Through the application of new element modification and preparation techniques, they have improved the surface chemistry of the support material, reduced the interaction between the support and active components, enhanced the distribution of active species, and significantly improved desulfurization and saturation performance.
After seven months of continuous operation, the test results demonstrated that when using straight-run naphtha as the feedstock, the sulfur content was reduced from 216 g/g to 0.5 g/g. All parameters—including processing capacity, reaction temperature, nitrogen content, and bromine value—met the required standards.
The DZF-1 catalyst exhibits excellent adaptability and can address various challenges such as shortages of reforming feedstocks or ethylene cracking feedstocks, as well as the upgrading of catalytic gasoline quality. By increasing the processing volume or blending catalytic gasoline, it helps optimize the integration of refining and chemical industries, supporting more efficient and sustainable operations.
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