On May 20, a key breakthrough was achieved in the resource utilization of solid waste in the petroleum industry. A scientific research team from Xi'an Shiyou University independently developed a catalytic pyrolysis technology system for oily sludge and a "high recovery rate - low emission - low energy consumption" three-in-one integrated solution, successfully achieving efficient recovery of petroleum resources from oily sludge and synchronous stabilization treatment of heavy metals. This achievement recently won the second prize of the Shaanxi Provincial Science and Technology Progress Award and the first prize of the Chemical Industry and Engineering Society of China Science and Technology Award, providing a new pathway for the green and low-carbon transformation of the petroleum industry.

Currently, the annual new output of oily sludge in China reaches 12 million tons, with a historical stockpile exceeding 1.04 billion tons. This contains nearly 200 million tons of recoverable petroleum resources, representing a "new oil pathway" waiting to be developed. However, for a long time, issues such as low oil resource recovery rates from oily sludge, difficulty in meeting residue treatment standards, and high processing energy consumption have plagued the development of this field.

Focusing on this pain point, the team led by Dr. Hu Haijie from Xi'an Shiyou University has been deeply engaged in this field for over 10 years. Relying on the platform of relevant key laboratories at Xi'an Shiyou University, they conducted dedicated research and meticulous verification, establishing a complete low-temperature catalytic pyrolysis technology system for oily sludge. The team developed the HJ series of catalysts and innovated supporting processes, increasing the oil recovery rate from 75% to 86%. The petroleum hydrocarbon content in the treated residue is below 0.2%, and the synchronous stabilization level of heavy metals meets the latest environmental protection requirements.

The team also simultaneously developed the first domestic low-energy consumption pyrolysis equipment intelligent control system, enabling fully intelligent operation of the entire process. Currently, the related achievements have been granted 13 authorized invention patents and 5 copyrights, and have been successfully applied in multiple large oilfields.