Abstract
In this paper, new matrix and corresponding fluidized catalytic cracking (FCC) catalysts were prepared by reutilizing the exhausted dust which was derived from fluidized catalytic cracking flue gas. The results showed that the new matrix has wider mesopore size distribution than pseudo-boehmite binder. With the increase of the additional amount of this new matrix, FCC catalyst possessed increased micro-activity test conversion of vacuum gas oil (VGO) from 68 % to 71 %. The catalytic cracking performance on a fixed fluidized bed unit showed that compared with CAT-1, the conversion of VGO on CAT-5 increased by 1.19 %, heavy oil yield and coke yield decreased by 2.16 and 1.65 %, respectively. Besides, the total liquid yield and light oil yield increased by 2.27 and 2.26 %, respectively. The reaction performance of CAT-3 and CAT-5 is obviously superior to CAT-1. The appropriate pore structures and crystallized Y zeolite component on this new matrix improve the cracking ability of FCC catalysts.
Highlights
Air-particle pollution in China, which is caused by increasing fossil fuel consumption and industrial particulate emissions, gives rise to the deterioration of air quality and severe haze weather
In this paper, new matrix and corresponding fluidized catalytic cracking (FCC) catalysts were prepared by reutilizing the exhausted dust which was derived from fluidized catalytic cracking flue gas
The catalytic cracking performance on a fixed fluidized bed unit showed that compared with CAT-1, the conversion of vacuum gas oil (VGO) on CAT-5 increased by 1.19 %, heavy oil yield and coke yield decreased by 2.16 and 1.65 %, respectively
Summary
Air-particle pollution in China, which is caused by increasing fossil fuel consumption and industrial particulate emissions, gives rise to the deterioration of air quality and severe haze weather. The fluid catalytic cracking (FCC) unit is an important industrial particulate source [1, 2]. FCC catalyst with particle sizes in the range of 80–180 lm cycles between FCC riser and regenerator for hydrocarbons cracking and reactivation [3]. Due to the collision, hydrothermal collapse, and mechanical friction in recycle, spent FCC catalyst becomes dust and escapes with the FCC flue gas when its particulate size is less than 30 lm (more than 50 % is \10 lm), leading to higher concentration of atmospheric particulate matter pollution. It is necessary to control the emission of FCC flue gas dust
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