Catalytic pyrolysis of Chinese Daqing atmospheric residue on a commercial fluid catalytic cracking(FCC) catalyst was investigated in a confined fluidized bed reactor.The results show that the commercial FCC catalyst h...Catalytic pyrolysis of Chinese Daqing atmospheric residue on a commercial fluid catalytic cracking(FCC) catalyst was investigated in a confined fluidized bed reactor.The results show that the commercial FCC catalyst has good capability of cracking atmospheric residue to light olefins.The analysis of gas samples shows that the content of total light olefins in cracked gas is above 80%.The analysis of liquid samples shows that the content of aromatics in liquid samples ranges from 60% to 80%,and it increases with the enhancement of reaction temperature.The yield of total light olefins shows a maximum with the increase of reaction temperature,the weight ratios of catalyst-to-oil and steam-to-oil,respectively.The optimal reaction temperature,the weight ratios of catalyst-to-oil and steam-to-oil are about 650℃,15 and 0.75,respectively.展开更多
Treating acid gases contained in natural gas by MDEA is used widely. But the efficiency of regeneration of the MDEA solution limited the development of this technology. An optimal temperature is necessary for regenera...Treating acid gases contained in natural gas by MDEA is used widely. But the efficiency of regeneration of the MDEA solution limited the development of this technology. An optimal temperature is necessary for regeneration of the MDEA solution using membrane distillation. The experiment results showed that the regeneration rate of MDEA rose with an increasing temperature. But the rate increased slowly after the regeneration temperature arrived at a certain value. This study can confirm that regeneration of the MDEA solution using membrane distillation is feasible. This technology provides more advantages as compared to conventional regeneration process.展开更多
A technology of ultrasonic-electric united desalting and dewatering of crude oil is studied. The ultrasonic setup is designed to form a standing-wave field, which is more efficient for agglomeration of water particles...A technology of ultrasonic-electric united desalting and dewatering of crude oil is studied. The ultrasonic setup is designed to form a standing-wave field, which is more efficient for agglomeration of water particles. The desalting and dewatering results of the ultrasonic-electric united process are compared with those of the electric process. For high salt-contenting crude oil （40-70 mg·L ^-1）, the salt content is still above 10.0 mg·L^-1 after crude oil has been treated by two-stage electric desalting process in refinery, which cannot meet the need of refinery. Ultrasonic-electric united process is a novel technology for treating the high salt-contenting oil. On the optimal operating conditions of the ultrasonic-electric united process, the salt content of crude oil can be reduced from 67 5 mg·L^-1 to 3.97 mg·L ^-1 by one-stage ultrasonic-electric united process, and the water content falls below 0.3% （by volume）. The results show that the ultrasonic-electric united process is more effective than the electric process in high salt-contenting oil desalting. This technology should be useful in the refinery process.展开更多
基金National Science Fund for Distinguished Young Scholars of China(20525621)Major Research Plan of the Ministry of Education of China(307008).
文摘Catalytic pyrolysis of Chinese Daqing atmospheric residue on a commercial fluid catalytic cracking(FCC) catalyst was investigated in a confined fluidized bed reactor.The results show that the commercial FCC catalyst has good capability of cracking atmospheric residue to light olefins.The analysis of gas samples shows that the content of total light olefins in cracked gas is above 80%.The analysis of liquid samples shows that the content of aromatics in liquid samples ranges from 60% to 80%,and it increases with the enhancement of reaction temperature.The yield of total light olefins shows a maximum with the increase of reaction temperature,the weight ratios of catalyst-to-oil and steam-to-oil,respectively.The optimal reaction temperature,the weight ratios of catalyst-to-oil and steam-to-oil are about 650℃,15 and 0.75,respectively.
文摘Treating acid gases contained in natural gas by MDEA is used widely. But the efficiency of regeneration of the MDEA solution limited the development of this technology. An optimal temperature is necessary for regeneration of the MDEA solution using membrane distillation. The experiment results showed that the regeneration rate of MDEA rose with an increasing temperature. But the rate increased slowly after the regeneration temperature arrived at a certain value. This study can confirm that regeneration of the MDEA solution using membrane distillation is feasible. This technology provides more advantages as compared to conventional regeneration process.
文摘A technology of ultrasonic-electric united desalting and dewatering of crude oil is studied. The ultrasonic setup is designed to form a standing-wave field, which is more efficient for agglomeration of water particles. The desalting and dewatering results of the ultrasonic-electric united process are compared with those of the electric process. For high salt-contenting crude oil （40-70 mg·L ^-1）, the salt content is still above 10.0 mg·L^-1 after crude oil has been treated by two-stage electric desalting process in refinery, which cannot meet the need of refinery. Ultrasonic-electric united process is a novel technology for treating the high salt-contenting oil. On the optimal operating conditions of the ultrasonic-electric united process, the salt content of crude oil can be reduced from 67 5 mg·L^-1 to 3.97 mg·L ^-1 by one-stage ultrasonic-electric united process, and the water content falls below 0.3% （by volume）. The results show that the ultrasonic-electric united process is more effective than the electric process in high salt-contenting oil desalting. This technology should be useful in the refinery process.
