Toluene insoluble matter (TIM) in coker heavy gas oil (CHGO) from oil sands bitumen is harmful to the downstream hydrotreating, and it may be difficult to be removed by conventional filtration. In order to determine i...Toluene insoluble matter (TIM) in coker heavy gas oil (CHGO) from oil sands bitumen is harmful to the downstream hydrotreating, and it may be difficult to be removed by conventional filtration. In order to determine its origin, the TIM must first be separated from CHGO for characterization. Two techniques are described to acomplish this goal. In the ultra-centrifugation approach used in this work, CHGO is blended with a miscible liquid and centrifuged under 366000 G (gravity) force. Through this procedure toluene and hexane diluents yielded TIM contents of 24μg.g^-1 and 88μg.g^-1 respectively. In an alternative simplified procedure, the initial ultracentrifugation step is omitted. Several different solvents are evaluated for use as diluents but, in each case, toluene is still used in the subsequent washing steps. TIM contents determined by this method range from 23 to about 200μg.g^-1. The amount of TIM separated by means of this method depends primarily on the initial diluent used.Other conditions, such as diluent-oil ratio, water-oil ratio, mixing time, temperature and water pH value, are also studied.展开更多
The nitrogen distribution in products during catalytic cracking of coker gas oil(CGO) was investigated in a laboratory two-staged riser catalytic cracking(TSRFCC) experimental unit with Kelamayi CGO as feedstock.The r...The nitrogen distribution in products during catalytic cracking of coker gas oil(CGO) was investigated in a laboratory two-staged riser catalytic cracking(TSRFCC) experimental unit with Kelamayi CGO as feedstock.The results showed that operation parameters,such as reaction temperature,catalyst-oil ratio and residence time,all could significantly affect the nitrogen distribution in the products.The nitrogen in the gas product and gasoline fractions decreased with the increase of reaction temperature and/or residence time,which could promote the thermal cracking.However,the nitrogen in gas product and gasoline fractions increased with the increase of catalyst-oil ratio,which could mainly enhance the catalytic cracking.On the whole,after CGO conversion,about 50% of the total nitrogen could produce nitrogen-containing coke over catalyst,and 20% of the total nitrogen remained in heavy oil,while only a little of the total nitrogen could be transfered into diesel,gasoline and gas products.展开更多
基金CHGO sample was provided by Synrude Canada Ltd.Plant.
文摘Toluene insoluble matter (TIM) in coker heavy gas oil (CHGO) from oil sands bitumen is harmful to the downstream hydrotreating, and it may be difficult to be removed by conventional filtration. In order to determine its origin, the TIM must first be separated from CHGO for characterization. Two techniques are described to acomplish this goal. In the ultra-centrifugation approach used in this work, CHGO is blended with a miscible liquid and centrifuged under 366000 G (gravity) force. Through this procedure toluene and hexane diluents yielded TIM contents of 24μg.g^-1 and 88μg.g^-1 respectively. In an alternative simplified procedure, the initial ultracentrifugation step is omitted. Several different solvents are evaluated for use as diluents but, in each case, toluene is still used in the subsequent washing steps. TIM contents determined by this method range from 23 to about 200μg.g^-1. The amount of TIM separated by means of this method depends primarily on the initial diluent used.Other conditions, such as diluent-oil ratio, water-oil ratio, mixing time, temperature and water pH value, are also studied.
文摘The nitrogen distribution in products during catalytic cracking of coker gas oil(CGO) was investigated in a laboratory two-staged riser catalytic cracking(TSRFCC) experimental unit with Kelamayi CGO as feedstock.The results showed that operation parameters,such as reaction temperature,catalyst-oil ratio and residence time,all could significantly affect the nitrogen distribution in the products.The nitrogen in the gas product and gasoline fractions decreased with the increase of reaction temperature and/or residence time,which could promote the thermal cracking.However,the nitrogen in gas product and gasoline fractions increased with the increase of catalyst-oil ratio,which could mainly enhance the catalytic cracking.On the whole,after CGO conversion,about 50% of the total nitrogen could produce nitrogen-containing coke over catalyst,and 20% of the total nitrogen remained in heavy oil,while only a little of the total nitrogen could be transfered into diesel,gasoline and gas products.
