Production of pyro-hydrochar from marine biomass,Undaria pinnatifida and its application as solid acid catalyst

摘要

Carbonization method has been gaining attention as a promising method to convert waste biomass into resourceful products.Though,converting woody biomass into biochar have been ventured widely[1],marine biomass is less popular as a source for biochar as they lack lignin in their constituents which enable the production of highly aromatized biochar [2].However,as marine biomass contains high percentage of carbohydrate [2],with an appropriate method it can be converted into highly potential biochar.Pyrolysis,a widely employed biomass conversion technique,is a thermal degradation at mediate temperature under limited oxygen gas to yield bio-oil,biochar and gases [3].Hydrothermal carbonization(HTC)is a thermal conversion of biomass using wet medium and it is usually conducted in temperatures between 160-300 °C and pressure below 5000 kPa.[1] In this study,a novel sequential carbonization of combining both pyrolysis and hydrothermal carbonization method was employed to produce a high potential pyro-hydrochar from Undaria pinnatifida.The effects of preparation method and its application as solid acid catalyst is investigated in this study.