The high-altitude hydrogenation technology of naphthenic diesel has been successfully applied

On December 19, it was learned from CNOOC Tianjin Chemical Research and Design Institute Co.
, Ltd.
(hereinafter referred to as CNOOC Development Tianjin Institute) that the naphthenic diesel high-airspeed hydrogenation technology independently developed by CNOOC was successfully applied in CNOOC Zhongjie Petrochemical Co.
, Ltd.
and has been in stable operation for 6 months, marking a new breakthrough
in the application of TH series hydrogenation catalyst in CNOOC Development Tianjin Institute.

In 2020, the pressure of Zhongjie Petrochemical's 800,000 tons/year diesel hydrogenation unit fluctuated systematically, and it has not been able to reach mass production, which has affected the company's efficiency
.
After the diagnosis of experts from refining and chemical companies, they proposed modification plans
such as replacing high-performance catalysts.
However, the gradation of high-speed catalysts has become a problem
faced by Sino-Czech Petrochemical.

In October 2020, Zhu Jinjian, head of hydrogenation technology at CNOOC Development Tianjin Institute, took the initiative to concentrate his superior scientific research forces to develop a high-performance hydrogenation catalyst to solve the problem
that has plagued Sinojet Petrochemical for six years.
Later, after full demonstration by the project team, CNOOC Development Tianjin Institute determined a new "order-type" scientific research and development model to promote the implementation of scientific research projects for cooperation
.

After confirming the cooperation intention with Sinojet Petrochemical, the two parties applied for the scientific research project
of "Process Optimization and Catalyst Suitability Research of Straight Diesel Hydrogenation Unit".
In response to the needs of Sinojet Petrochemical, CNOOC Development Tianjin Institute set up a key project research team of "three and three establishments", and the second department of operation organized by Sino-Czech Petrochemical Technology Department to conduct on-site investigation and communication for many times
.
According to the characteristics of naphthenic diesel, the research team optimized the structure and active components of the catalyst pore, and combined with the characteristics of the future raw material of Zhongjie Petrochemical's diesel hydrogenation unit, the requirements for catalyst performance were improved
.
Due to the tight time and heavy task of the project, the research team continued to work hard to optimize the catalyst and process, and it took less than 3 months to complete the process technology optimization plan, and communicated with Yu Aijun, manager of the second production department of Sino-Jie Petrochemical Technology, and finally determined the technical details
such as the filling plan, process conditions and pressure drop of the catalyst.

On June 19, 2022, the transformed Zhongjie Petrochemical's 800,000 tons/year diesel hydrogenation unit was successfully started up at one time, and all products were qualified
.
The replacement of the TH series hydrorefining catalyst has freed up the production capacity
of the plant.
The calibration results show that the operation of the device is stable after transformation, and the operating temperature, radial temperature rise and product quality of the catalyst are better than the design index
.
While ensuring product quality, the pressure fluctuation of the reaction system of the plant is eliminated, and the feed volume is increased by nearly 40%
compared with before the shutdown.
In the past 6 months of operation, the plant has not only completed the task of ensuring diesel supply, but also increased the benefit by more than 36 million yuan, becoming a new profit growth point
for Sinopec.

At present, CNOOC Development Tianjin Institute TH series hydrogenation catalysts have developed a series of hydrorefining, hydrocracking, hydromodification and other series of technologies and supporting catalysts, and completed application verification on different hydrogenation units of many enterprises, forming CNOOC's own hydrogenation catalyst technology system
.