Guangzhou Petrochemical's reforming catalyst activity has achieved results

China Petrochemical News Network reported that in May, the No.
1 reformer of Guangzhou Petrochemical Refining Division II implemented a series of key measures such as optimizing raw material components, optimizing the reforming reaction and the operating conditions of the catalyst regeneration system, and replacing the appropriate amount of catalysts in the No.
2 reformer.
In the past month of continuous optimization and adjustment, the overall activity of the reforming catalyst of the unit has gradually recovered, and the temperature drop of the reforming reaction, the purity of the circulating hydrogen, the octane number of gasoline products, and the conversion rate of aromatics have all been improved
.

Since the second half of 2020, the catalyst activity of the reforming reaction of the device has gradually decreased, the temperature drop of the reforming reaction has decreased, the purity and yield of hydrogen have decreased, and the octane number of reformed gasoline has decreased
.

In order to ensure product quality, the plant personnel adjust the production operation on the one hand, increase the amount of refined oil and adjust the operating parameters of the reforming feed stripper, optimize and increase the aromatic latent content of the reforming feed, increase the reforming reaction temperature and the amount of chlorine injection for catalyst regeneration , To restore the activity of the reforming catalyst; on the other hand, organize the research on the cause of the decrease in catalyst activity
.

After careful tracking and investigation of the components of the reforming catalyst, the plant personnel found that the silicon content in the reforming catalyst was abnormally high and the rising speed was relatively fast
.

The high content of silicon will directly affect the bimetallic function of the catalyst, resulting in a decrease in the overall activity of the catalyst

After analysis, the pre-hydrogenation catalyst is approaching the end of its life cycle, and its impurity adsorption activity is reduced, and it cannot completely adsorb silicon impurities in the raw materials.
Eventually, the reforming catalyst slowly accumulates in the reforming reaction system, which is the main cause of the decrease in the activity of the reforming catalyst Reason
.

In response to the decrease in the activity of the reforming catalyst, the Second Refining Department immediately set up a research team to formulate solutions and measures
.

On the basis of optimizing and increasing the aromatic potential content of the reforming feed, increasing the reforming reaction temperature and adjusting the amount of chlorine injection for catalyst regeneration, the research team contacted the production scheduling department to investigate the silicon-containing related processes that may pollute the feedstock oil, and control the reforming at the same time The content of the carbon eleven component in the feed can alleviate the coking reaction of the catalyst

　　The high-purity hydrogen of the No.
2 reformer is incorporated into the reforming circulating hydrogen of the device to increase the hydrogen partial pressure of the reforming reaction and reduce the carbon deposit on the catalyst
.

In addition, based on the characteristics that the No.

　　After continuous research and optimization, in June, the reformer No.
1 reforming catalyst deactivation technology has achieved results, and various key production indicators have recovered beyond expectations
.

The temperature drop of the reforming reaction was restored from 155 degrees Celsius to 240 degrees Celsius, the purity of circulating hydrogen was restored from 82.

　　(Huang Minqing Fan Manqing)