N-doped graphene loaded Pd catalyst, preparation method thereof and application of catalyst

Abstract

The invention provides an N-doped graphene loaded Pd catalyst, and belongs to the technical field of chlorinated phenol catalyzed dechlorination environmental protection. The catalyst takes N-doped layered graphene as a carrier and a metal Pd as an active component, and the metal Pd accounts for 0.1-9% of the weight of the whole catalyst. The invention further provides a preparation method and anapplication of the catalyst. The preparation method includes the steps: dissolving metal Pd compounds and nitrogen compounds in alcohol; stirring mixture, adding the graphene, and continuing to stir mixture; cooling the mixture to reach the indoor temperature, and performing high-temperature reduction after vacuum drying until a loaded metal element palladium reach zero valence to obtain the N-doped graphene loaded Pd catalyst. The catalyst is mild in reaction condition when being used for chlorinated phenol dechlorination, the chlorinated phenol can be completely dechlorinated at normal temperature and normal pressure, the catalyst is good in stability, the chlorinated phenol with high concentration can be catalyzed and dechlorinated by the catalyst, and reactant concentration can reach 3.0g / L when the chlorinated phenol catalyzed and dechlorinated by the catalyst prepared by the method.

Description

technical field [0001] The invention belongs to the technical field of chlorinated phenol catalytic dechlorination and environmental protection, and specifically relates to an N-doped graphene-supported Pd catalyst, a preparation method and application thereof. Background technique [0002] Chlorinated phenolic organic compounds are a very important class of chemical raw materials and are widely used in the production of dyes, preservatives, herbicides and insecticides. Such compounds have good chemical stability and thermal stability, and are not easy to be decomposed or biodegraded. The extensive use in industrial and agricultural production has caused serious pollution to the environment. Therefore, the study on the removal of chlorinated phenol pollutants is of great significance to the ecological environment and human health. [0003] In recent years, catalytic hydrodechlorination technology has been widely used in the elimination of hydrodechlorination of chlorinated ...

AI Technical Summary

Problems solved by technology

However, in the process of catalytic hydrodechlorination, a large amount of by-product HCl will be produced, which will cause catalyst Cl poisoning or dissolve the catalyst, reducing the activity and stability of the catalyst.

Adding a large amount of alkali additives such as NaOH and triethylamine to the reaction system can effectively inhibit catalyst poisoning, but the addition of alkali additives in the reaction system will cause secondary pollution, increasing the complexity and cost of the operation