Ultra-low sulfur diesel hydrotreating technology breakthrough

Recently, from the China Petroleum and Petrochemical Research Institute, the news that the hospital and China University of Petroleum (Beijing), Daqing Petrochemical Company, Urumqi Petrochemical Company and Fushun Petrochemical Company jointly developed PHF ultra-low sulfur diesel hydrotreating technology, passed Identification of China Petroleum Organization. The appraisal committee unanimously believes that the technology has the ability to produce V-fuel blending components for the country, and has reached the international advanced level as a whole, and has broad application prospects.

According to reports, PHF ultra-low sulfur diesel hydrotreating technology covers the research and development, industrial production and industrial applications of catalysts. By adopting high-efficiency structured structure carrier preparation technology, the researchers successfully developed PHF ultra-low sulfur diesel hydrotreating catalyst, optimized the production process conditions of catalyst forming, drying and immersion roasting process, and improved the shape regularity of the catalyst while ensuring the catalyst. The overall uniformity of quality. They have also developed a grading technology for the protective agent and catalyst to effectively protect the activity of the catalyst, control the reactor bed lamination, and have an operating cycle of more than 3 years.

In 2010 and 2011, PHF ultra-low sulfur diesel hydrotreating technology was successfully applied in Daqing Petrochemical Company and Urumqi Petrochemical Company diesel hydrogenation unit. The industrial operation data shows that the catalyst has excellent hydrogenation performance and can meet the technical requirements of the installation of national IV and national V diesel. Compared with the national V diesel produced by hydrocracking, hydrorefined diesel products have obvious advantages in technology, quality and economic benefits, which can provide enterprises with greater profit margins.

At present, diesel exhaust has become a major source of atmospheric pollution. Domestic diesel consumption has reached 125 million tons per year, and it is still increasing at a rate of 5% to 6% per year. Therefore, the state's requirements for vehicle exhaust emission standards and oil quality are constantly improving. At the end of 2014, the national IV diesel standard will be officially implemented nationwide. At the end of 2017, the national V diesel standard will be implemented. For the sulfur content of diesel, polycyclic aromatic hydrocarbons, 16 Alkaline values ​​and other strict requirements, diesel quality upgrade has become one of the top tasks of the current refining and chemical enterprises.

In this regard, PetroChina actively responded to the upgrading requirements of oil quality, and regarded it as the top priority of the “Twelfth Five-Year Plan”. The Petrochemical Research Institute directly under the refining and chemical research institute successively carried out small test, pilot test and industrial amplification of the catalyst. The research was the first to develop a clean diesel production technology that meets the national IV and national V diesel standards and successfully applied it. During the development process, researchers introduced a new type of catalytic material to greatly improve the hydrogenation performance of the catalyst, and achieved simultaneous ultra-deep removal of sulfur, nitrogen and aromatics in the hydrotreating process of diesel. Ultra-low sulfur diesel hydrotreating technology will play a major role in enhancing the production capacity of China's petroleum clean diesel, improving product quality, meeting the rapidly growing demand for clean diesel market, and promoting the upgrading of China's clean fuel quality. (Author: Gou Aixian)