Abstract: Chlorides in catalytic reforming units can adversely affect the production process. This study employs a one-pot method to prepare a high-efficiency liquid-phase dechlorination agent, primarily composed of alkali metal salts, molecular sieves, and sepiolite. The performance evaluation of the dechlorination agent and the dechlorination process are investigated, and the adsorption mechanism is explored through kinetic modeling. The performance evaluation results indicate that the self-prepared high-efficiency liquid-phase dechlorination agent has a chlorine capacity of 44.08%. The dechlorination agent exhibits a large specific surface area and abundant pore structures. As the dechlorination process proceeds, the specific surface area of the dechlorination agent increases, the pore size decreases, the skeletal structure remains largely unchanged, and the number of acidic sites gradually diminishes. The equilibrium adsorption capacity of the dechlorination agent increases with rising temperature. The kinetic model fitting results demonstrate that the dechlorination process follows a pseudo-second-order kinetic model, with chemical adsorption as the dominant mechanism.

Key words: catalytic reforming, liquid-phase dechlorination agent, reaction kinetics, zeolite, sepiolite, chlorine capacity