生物质与塑料共催化热解制备芳烃化合物研究进展

Review on the progress in the production of aromatic hydrocarbons by co-catalytic pyrolysis of biomass and plastics

芳烃,尤其苯、甲苯、二甲苯(BTX)等单环芳烃,是化工行业重要的基础原料,主要来源于化石燃料的催化重整与热裂解。生物质与塑料共催化热解制芳烃具有高效、环保、低成本、高选择性等优点,可以解决因生物质富氧、贫氢的特点造成热解产物氧含量高、芳烃收率和选择性低等问题。本工作主要综述了生物质与塑料共催化热解制备芳烃化合物的研究进展,介绍了共催化热解反应原料类别,重点论述了共催化热解反应催化剂,总结归纳了共催化热解双烯合成、烃池协同等反应机理。展望了生物质与塑料共催化热解未来的研究重心与发展方向,即通过研制高活性、高稳定性的改性分子筛催化剂来提高芳烃产率。

Aromatic hydrocarbons,especially monocyclic aromatic hydrocarbons such as benzene,toluene,and xylene(BTX),are important basic raw materials in the chemical industry,which are mainly derived from the catalytic reforming and thermal cracking of fossil fuels.The co-catalytic pyrolysis of biomass and plastic to produce aromatics has the advantages of high efficiency,environmental protection,low cost,and high selectivity.It can solve the problems of pyrolysis products such as high oxygen content,low aromatics yield,and low selectivity,which are caused by the characteristics of biomass rich in oxygen and poor in hydrogen.This article reviewed the research progress of co-catalytic pyrolysis of biomass and plastics to prepare aromatic compounds.Firstly,the types of raw materials for co-catalytic pyrolysis were introduced,and then the co-catalytic pyrolysis catalysts were emphasized.The reaction mechanisms of co-catalytic pyrolysis of biomass and plastics,such as the synthesis of dienes and hydrocarbon pool synergy were summarized.Finally,the future research focus and development direction of co-catalytic pyrolysis of biomass and plastics were proposed,which is developing the highly active and stable modified molecular sieve catalysts in order to improve the aromatics yield.