According to the process features and the reaction mechanism of FDFCC technology, its two reaction subsystems, one for heavy oil riser reactor, the other for gasoline riser reactor, were respec-tively studied. Corresp...According to the process features and the reaction mechanism of FDFCC technology, its two reaction subsystems, one for heavy oil riser reactor, the other for gasoline riser reactor, were respec-tively studied. Correspondingly, a 12-lump kinetic model for heavy oil FCC and a 9-lump kinetic model for gasoline catalytic upgrading were presented. Based on this work, mathematical correlation of the lumps in the feeds and products involved in the reaction subsystems and those of the overall reaction system were analyzed in detail. Then, a combined kinetic model for FDFCC, which was based on the data recovered from a commercial unit, was put forward. The reaction performance embodied by the kinetic constants for the combined model of FDFCC was in accordance with catalytic cracking reaction mechanism. The model-calculated values were close to the data obtained in commercial scale. The model was easy to be applied in practice and could also provide some theoretical groundwork for further re-search on kinetic model for FDFCC.展开更多
On the basis of formulating the 9-lump kinetic model for gasoline catalytic upgrading and the 12-lump kinetic model for heavy oil FCC,this paper is aimed at development of a combined kinetic model fora typical FDFCC p...On the basis of formulating the 9-lump kinetic model for gasoline catalytic upgrading and the 12-lump kinetic model for heavy oil FCC,this paper is aimed at development of a combined kinetic model fora typical FDFCC process after analyzing the coupled relationship and combination of these two models.Themodel is also verified by using commercial data,the results of which showed that the model can betterpredict the product yields and their quality,with the relative errors between the main products of the unit andcommercial data being less than five percent.Furthermore,the combined model is used to predict andoptimize the operating conditions for gasoline riser and heavy oil riser in FDFCC.So this paper can offersome guidance for the processing of FDFCC and is instructive to model research and development of suchmulti-reactor process and combined process.展开更多
This paper studies the output consensus problem of heterogeneous linear stochastic multiagent systems with multiplicative noises in system parameters and measurements,where the system noise in each agent is allowed to...This paper studies the output consensus problem of heterogeneous linear stochastic multiagent systems with multiplicative noises in system parameters and measurements,where the system noise in each agent is allowed to be different.By employing stochastic output regulation theory and the stochastic Lyapunov function approach,a composite controller embedded with stochastic output regulator equations(SOREs)and a stochastic dynamic compensator is designed to achieve the meansquare output consensus of the multi-agent systems.To implement the consensus algorithm,a sufficient condition for feasible solutions of the SOREs is first established in terms of Lyapunov and Selvester equations.Then the time-varying SOREs are approximated by the Euler-Maruyama method combined with an a-posteriori partial estimation of the increments of the Brownian motion.A numerical example illustrates the theoretical results.展开更多
文摘According to the process features and the reaction mechanism of FDFCC technology, its two reaction subsystems, one for heavy oil riser reactor, the other for gasoline riser reactor, were respec-tively studied. Correspondingly, a 12-lump kinetic model for heavy oil FCC and a 9-lump kinetic model for gasoline catalytic upgrading were presented. Based on this work, mathematical correlation of the lumps in the feeds and products involved in the reaction subsystems and those of the overall reaction system were analyzed in detail. Then, a combined kinetic model for FDFCC, which was based on the data recovered from a commercial unit, was put forward. The reaction performance embodied by the kinetic constants for the combined model of FDFCC was in accordance with catalytic cracking reaction mechanism. The model-calculated values were close to the data obtained in commercial scale. The model was easy to be applied in practice and could also provide some theoretical groundwork for further re-search on kinetic model for FDFCC.
文摘On the basis of formulating the 9-lump kinetic model for gasoline catalytic upgrading and the 12-lump kinetic model for heavy oil FCC,this paper is aimed at development of a combined kinetic model fora typical FDFCC process after analyzing the coupled relationship and combination of these two models.Themodel is also verified by using commercial data,the results of which showed that the model can betterpredict the product yields and their quality,with the relative errors between the main products of the unit andcommercial data being less than five percent.Furthermore,the combined model is used to predict andoptimize the operating conditions for gasoline riser and heavy oil riser in FDFCC.So this paper can offersome guidance for the processing of FDFCC and is instructive to model research and development of suchmulti-reactor process and combined process.
基金supported by the National Natural Science Foundation of China under Grant Nos.62003104 and 62003103the Guangxi Science and Technology Planning Project under Grant No.AD23026217+2 种基金the Guangxi Natural Science Foundation under Grant No.2022GXNSFBA035649the Interdisciplinary Scientific Research Foundation of Guangxi University under Grant No.2022JCC019the Guangxi University Natural Science and Technological Innovation Development Multiplication Plan Project under Grant No.2023BZRC018。
文摘This paper studies the output consensus problem of heterogeneous linear stochastic multiagent systems with multiplicative noises in system parameters and measurements,where the system noise in each agent is allowed to be different.By employing stochastic output regulation theory and the stochastic Lyapunov function approach,a composite controller embedded with stochastic output regulator equations(SOREs)and a stochastic dynamic compensator is designed to achieve the meansquare output consensus of the multi-agent systems.To implement the consensus algorithm,a sufficient condition for feasible solutions of the SOREs is first established in terms of Lyapunov and Selvester equations.Then the time-varying SOREs are approximated by the Euler-Maruyama method combined with an a-posteriori partial estimation of the increments of the Brownian motion.A numerical example illustrates the theoretical results.