生物质热化学转化过程中碱金属分布及迁移特性

Distribution and Migration of Alkali Metals During Biomass Thermochemical Transformation

生物质能源具有分布广泛,总量巨大,H/C比高的优点。对其充分利用可有效缓解当下的化石能源危机,还可以为“碳达峰”及“碳中和”目标做贡献。但在其综合利用过程中,其中含有的碱金属元素会带来诸多问题,严重制约生物质热化学转化利用的发展。主要综述生物质热化学转化过程中碱金属的迁移特性,对生物质热转化中碱金属分析理论技术、生物质中碱金属含量及赋存形态、碱金属迁移转化影响因素进行论述,并对生物质内碱金属元素的赋存形态区分、碱金属释放的原位检测技术以及碱金属迁移转化过程中各反应之间竞争及促进作用进行总结和展望。

Biomass energy has the advantages of wide distribution,abundant total amount,and high H/C ratio.Its comprehensive utilization can effectively replace part of fossil energy and contribute to the goal of“carbon peaking”and“carbon neutrality.”However,in the comprehensive utilization process,the alkali metal elements contained in the biomass will cause many problems,seriously restricting the development of biomass thermochemical conversion and utilization.This paper mainly introduced the migration mechanism of alkali metals during thermo-chemical transformation of biomass,including the test method of alkali metals,alkali metals’concentration and forms,factors influencing alkali metal migration,and the biomass of geometrical shape distinguish of alkali metal elements,alkali metal release of in-situ detection technology were summ arized and prospected.