Impact of vegetation type and pre-processing on product yields and properties following hydrothermal conversion of conservation biomass
Impact of vegetation type and pre-processing on product yields and properties following hydrothermal conversion of conservation biomass
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DOI：
10.1016/j.rser.2020.110462
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发表时间：
2020-10
影响因子：
15.9
通讯作者：
J. Corton;I. Donnison;Andrew Ross;A. Lea-Langton;M. Wachendorf;M. Fraser
中科院分区：
文献类型：
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作者：
J. Corton;I. Donnison;Andrew Ross;A. Lea-Langton;M. Wachendorf;M. Fraser
农业实践的变化和不太有利地区的土地弃置导致了自然保护土地管理的增加。每年都有大量的植被被砍伐用于生境管理，但产生的保护性生物量通常被丢弃。从以灯芯草（Juncusspp）或蕨菜（Pteridium aquilinum）为主的边缘地点收获的两种类型的保护生物质样品被洗涤和压榨，使用生物质固体燃料和沼气综合生产（IFBB）工艺产生流体和纤维工艺流。先前的研究表明，IFBB工艺产生的液体可以厌氧消化，为洗涤和压榨阶段产生足够的能量。目前的研究集中在纤维工艺流上，使材料进行水热转化，并调查了i)植被类型，ii)热水洗涤和压制预处理（部分脱矿）和iii)水热转化路线（水热碳化或水热液化）对产量，相对比例和产品特性的影响程度。原料来源对产品化学的影响远大于对产品产量的影响。燃烧燃料生产最有效的工艺路线是基于预处理原料的水热碳化。然而，如果生物油生产是生物精炼厂的优先产品，那么生物质预处理就不需要了。
Changes in agricultural practices and land abandonment across less favoured areas have led to an increase in land management for nature conservation. Substantial areas of vegetation are cut annually for habitat management, but the conservation biomass generated is generally discarded. Samples of two types of conservation biomass harvested from marginal sites dominated by rushes (Juncusspp) or bracken (Pteridium aquilinum) were washed and pressed to generate fluid and fibrous process streams using the Integrated Generation of Solid Fuel and Biogas from Biomass (IFBB) process. Previous work established the fluid from the IFBB process could be anaerobically digested to generate enough energy for the washing and pressing stages. The current study focussed on the fibrous process stream, subjecting material to hydrothermal conversion and investigated the extent to which i) vegetation type, ii) the impact of pre-treatment by hot water washing and pressing (partial demineralisation) and iii) hydrothermal conversion route (hydrothermal carbonisation or hydrothermal liquefaction) affected the yields, relative proportions, and characteristics of products generated. Feedstock source had substantially more effect on product chemistry than product yields. The most effective process route for combustion fuel production was based on hydrothermal carbonisation of pre-processed feedstock. However, if bio-oil production was to be the priority product in a biorefinery, then biomass pre-processing would not be required.