Comparison on Adsorptive Separation of n-Paraffins Based on Binderless and Binder-containing Zeolite 5A Pellets  

作　　者：Kong Ruiqi Jiang Hao Wang Dan Tan Jialun Ren Danni Sun Hui Shen Benxian Liu Jichang Tang Sheng Zhao Deyin Chang Xiaohu 

机构地区：[1]Petroleum Processing Research Center,East China University of Science and Technology,Shanghai 200237 [2]International Joint Research Center of Green Energy Chemical Engineering,East China University of Science and Technology,Shanghai 200237 [3]Sinopec Northwest Oilfield Branch,Urumqi 830011

出　　处：《China Petroleum Processing & Petrochemical Technology》2019年第4期21-28,共8页中国炼油与石油化工（英文版）

基　　金：financially supported by the Natural Science Foundation of Shanghai(Grant 16ZR1408100);the National Natural Science Foundation of China(Grant 91634112 and 21878097);the Open Project of State Key Laboratory of Chemical Engineering(SKL-ChE-16C01)

摘　　要：Binderless zeolite is considered to be a potential alternative for binder-containing zeolite in the industrial applications of adsorptive separation process. Synthesized binderless zeolite and commercial binder-containing product were used in adsorptive separation of n-paraffins from a model oil, with their performance compared. It is indicated that the binderless zeolite exhibits by 25%-35% higher in saturated adsorption capacity and by 115%-130% more adsorption amount at the breakthrough point with much shorter length of mass-transfer zone. Adsorptive separation of n-paraffins from naphtha was carried out in a fixed-bed adsorber containing the synthesized binderless zeolite 5 A under the operating conditions covering a feed space velocity of 90 h-1 and an adsorption temperature of 573 K. As compared to original naphtha, the raffinate shows by 34 units more in research octane number and by around 10% more of potential aromatic content, while the desorption oil exhibits by 13.3% more ethylene yield and by 11.7% higher in total olefins yield.Binderless zeolite is considered to be a potential alternative for binder-containing zeolite in the industrial applications of adsorptive separation process. Synthesized binderless zeolite and commercial binder-containing product were used in adsorptive separation of n-paraffins from a model oil, with their performance compared. It is indicated that the binderless zeolite exhibits by 25%—35% higher in saturated adsorption capacity and by 115%—130% more adsorption amount at the breakthrough point with much shorter length of mass-transfer zone. Adsorptive separation of n-paraffins from naphtha was carried out in a fixed-bed adsorber containing the synthesized binderless zeolite 5 A under the operating conditions covering a feed space velocity of 90 h-1 and an adsorption temperature of 573 K. As compared to original naphtha, the raffinate shows by 34 units more in research octane number and by around 10% more of potential aromatic content, while the desorption oil exhibits by 13.3% more ethylene yield and by 11.7% higher in total olefins yield.

关 键 词：binderless zeolite 5A adsorptive separation n-paraffins NAPHTHA 

分 类 号：O64[理学—物理化学]