ZL 2023 1 0146242.0 – Catalyst for plastic degradation hydrogen production and preparation method and application thereof
Researchers: Prof. Xi GAO, Sijie Li
Categories: waste treatment
Jurisdiction: China
Current status: Granted
Basic Information
The invention discloses a catalyst, its preparation method and application for hydrogen production from catalytic degradation of plastic, and relates to the field of waste treatment. The method comprises the following steps: respectively preparing an alcoholic liquid mixture A containing alumina and an alcoholic solution B containing iron salt and alkali, mixing, carrying out solvothermal reaction, filtering, drying, calcining in an oxygen-containing gas atmosphere, quenching, filtering and washing to obtain the catalyst.The catalyst is an alumina/ferric oxide composite material which contains hydroxyl and oxygen defects and has a heterojunction structure. The catalyst has low cost, high intrinsic catalytic activity and robust durability.
Innovation
The catalyst has a high specific surface area, is beneficial to exposing active sites on the surface of the catalyst in the degradation process of plastics, can generate active hydrogen in situ, optimizes hydrogenolysis and enables long-chain alkane to be chain-broken, has the cracking capacity of the alumina on polyethylene plastics, also considers the catalytic activity of an iron element in the aromatization reaction in the pyrolysis process of the plastics, simultaneously exposes more Lewis acid sites due to the oxygen defect structure of the ferric oxide. The hydrogen conversion rate is more than 70% in catalytic degradation of plastic in lab.