Article
Engineering, Chemical
Khoshim Kh. Urazov, Nikita N. Sviridenko
Summary: The study shows that the NiO precursor in heavy oil catalytic cracking can affect the composition of products, reduce the content of high molecular weight components, increase the yield of fractions, and decrease sulfur content.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Construction & Building Technology
Yuepeng Huang, Yong Jiao, Wenying Fang, Guangshao Yang, Rui Yang, Rui Yu, Rengui Xiao, Zhiyang Wang, Zhonghe Shui, Guiming Xie
Summary: In this study, spent fluidized catalytic cracking catalysts (SC) were incorporated into high-density cement-based materials (HDCM) at different concentrations, and their mechanical properties, hydration kinetics, durability, and environmental characteristics were evaluated. The results showed that HDCM containing SC exhibited improved compressive strength and long-term volumetric stability, and had a good ability to immobilize heavy metal ions. The leaching concentrations of Ni and V were significantly reduced, indicating a high immobilization rate.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Energy & Fuels
Roberto Palos, Elena Rodriguez, Alazne Gutierrez, Javier Bilbao, Jose M. Arandes
Summary: The kinetics of catalytic cracking of plastic pyrolysis oil over three FCC equilibrium commercial catalysts was modeled, with the simplest reaction scheme found to be the most appropriate. The properties of the catalysts, particularly total acidity and mesoporous structure, play a key role in determining the kinetic parameters. Among the catalysts, ECAT-3 stood out for maximizing the yields of naphtha and LPG, while ECAT-1 and ECAT-2 were better suited for producing light cycle oil.
Article
Chemistry, Physical
Corbett Senter, Melissa Clough Mastry, Claire C. Zhang, William J. Maximuck, John A. Gladysz, Bilge Yilmaz
Summary: Nickel, a common contaminant in crude oil, can deposit on FCC catalysts and lead to undesired reactions, hindering optimal operation. Modern catalyst technologies and aging can mitigate its effects, but reactivation of nickel due to chemical interactions within the FCC unit can impact catalytic performance.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Physical
Yuxin Xie, Yu Zhang, Lei He, Charles Q. Jia, Qiuxiang Yao, Ming Sun, Xiaoxun Ma
Summary: Catalytic cracking is a crucial refining process in the petrochemical industry, and the deactivation of zeolite catalysts by heavy oil poses challenges to raw material conversion and quality improvement. This paper clarifies the deactivation mechanisms, summarizes anti-deactivation methods such as modification, structure regulation, use of additives, and machine learning-assisted catalyst design, and proposes catalyst regeneration methods. The application of pore classification and nanocrystallization of catalysts provides a valuable reference for heavy oil catalytic cracking catalysts.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Energy & Fuels
Di Zhang, Yang Dai, Kun Chen, Aijun Guo, He Liu, Zongxian Wang
Summary: The oil-water interface method was found to be more effective in separating solid particles in SLO, with the ability to separate about 10% of fine coke powders under the same conditions.
Article
Engineering, Chemical
Li Zhang, Qingxun Hu, Yucai Qin, Honghai Liu, Xiaozheng Zhao, Xionghou Gao, Lijuan Song, Zhaolin Sun
Summary: A novel FCC catalyst was designed and prepared by synthesizing Y zeolite components in situ on kaolin microspheres. The unique distribution of Y zeolite on the surface of the catalyst microspheres plays a crucial role in promoting conversion of heavy oil, increasing gasoline selectivity, and reducing byproduct yield.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Environmental
Yunpeng Zhao, Huanzhi Liu, Xiaogang Shi, Xingying Lan, Jinsen Gao, Wenheng Jing, Weihong Xing
Summary: This study investigated the collision process between oil droplets and catalyst particles in the feeding section of the FCC riser reactor. It was found that the suitable collision velocity and oil droplet to catalyst diameter ratio can increase the gas film coverage area on the catalyst surface and prevent the direct contact between the liquid film with the catalyst surface. The collision eccentricity had significant effects on the vaporization rate.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Li Zhang, Qingxun Hu, Yucai Qin, Honghai Liu, Huangfei Liu, Gengzhen Cao, Xionghou Gao, Lijuan Song, Zhaolin Sun
Summary: Optimizing the accessibility of zeolite Y is crucial for improving the heavy oil cracking performance of fluid catalytic cracking (FCC) catalysts. Four FCC catalysts with different Y zeolite content were prepared by adjusting the crystallization time. The distribution characteristics of Y zeolite in the catalysts were analyzed using various microscopy techniques. The results showed that the distribution of Y zeolite in the outer layer of microspheres was beneficial for mass transfer performance and acid accessibility.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Energy & Fuels
Sepideh Izaddoust, Idoia Hita, Naydu Zambrano, David Trueba, Roberto Palos, Wen Zhang, Eva Epelde, Jose M. Arandes, Pedro Castano
Summary: In this study, we investigate the conversion of heavy-fuel oil waste from marine-transport operations into transportation fuels. The process involves hydrotreatment and fluid catalytic cracking, which can reduce sulfur content and yield high-quality gasoline.
Article
Energy & Fuels
Noah Niwamanya, Jinhong Zhang, Chunxiao Gao, Daniel Takyi Sekyere, Andrew Barigye, Jacqueline Nangendo, Yuanyu Tian
Summary: Direct pyrolysis of crude oil to petrochemical feedstocks is a trend in refineries. The study on catalytic pyrolysis of heavy crude oil using acid, base, and composite catalysts showed that composite catalysts can enhance the yields of light olefins and aromatics.
Review
Energy & Fuels
Fajun Zhao, Yongjian Liu, Ning Lu, Tianxiao Xu, Guangmeng Zhu, Kai Wang
Summary: This paper reviewed various catalysts for underground catalytic cracking and upgrading of heavy oil, emphasizing the need for low-cost, high activity, high selectivity, and wide adaptability catalysts, especially ultra-dispersed nano-catalysts. Further research is needed to explore optimal catalyst synthesis processes, catalytic working conditions, and actual mechanisms of heavy oil with catalysts in order to enhance heavy oil recovery.
Article
Chemistry, Physical
Karl Kharas, Melissa Clough Mastry, Aaron Thompson, Bilge Yilmaz
Summary: This study investigates the characteristics of iron in two different in situ FCC catalysts and finds that iron contamination does not have deleterious effects on catalytic cracking chemistry.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Biotechnology & Applied Microbiology
Eki Tina Aisien, Ifechukwude Christopher Otuya, Felix Aibuedefe Aisien
Summary: The study focused on the pyrolysis of waste polypropylene plastic using a batch reactor with varying reaction temperatures and catalyst ratios. The results showed that the catalyst, reaction temperatures, and catalyst to plastic ratio all had significant impact on the yield and composition of the pyrolysis products.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Energy & Fuels
Nikita N. Sviridenko, Akim S. Akimov
Summary: This paper studies the effect of NiCrWC catalyst surface pre-oxidation on the composition of heavy oil catalytic cracking products and proposes a hypothetical mechanism for the cracking of heavy oil components over pre-oxidized catalysts.
PETROLEUM SCIENCE AND TECHNOLOGY
(2023)
