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The influence of feedstock characteristics on processability of biosolid slurries for conversion to renewable crude oil via hydrothermal liquefaction
Chemical Engineering Research and Design ( IF 3.7 ) Pub Date : 2020-08-24 , DOI: 10.1016/j.cherd.2020.08.016
Sylvia Y. Edifor , Philip van Eyk , Patrick Biller , David M. Lewis

Hydrothermal Liquefaction (HTL) is a moderate temperature-high pressure depolymerisation process that converts organics in wet biomass into crude-like oil. HTL feedstock properties and characteristics will influence the conversion of organics into crude-like oil and other by-products. The aim of the investigation is to quantify specific feedstock (biosolids) parameters to determine optimal feedstock properties for converting biosolids into crude-like oil. The properties of the feedstock which included moisture content, ash content, particle density, bulk density, porosity and particle size were analytically determined which are useful data for reactor design. The data presented in this study analyses the behaviour of biosolids using batch settling experiments and pumping studies. The influence of particle size and solid concentration of biosolid slurries on the processability in terms of stability and pumpability of the feedstock slurry was assessed. Biosolid slurries with 60 w/w% dry solids were determined to be the minimum solid concentration that demonstrated no visible settling characteristics within an observation period of 30 min. Pumpability was achieved with slurries between 30 w/w% to 60 w/w% dry biosolids using a laboratory scale peristaltic pump. Pumping power required to transport biosolid slurries increased exponentially with an increase in solid concentration.



中文翻译:

原料特性对通过水热液化转化为可再生原油的生物固体浆料可加工性的影响

水热液化(HTL)是一种温和的高温高压解聚过程,可将湿生物质中的有机物转化为类原油。HTL原料的性质和特性将影响有机物向原油样油和其他副产品的转化。研究的目的是量化特定的原料(生物固体)参数,以确定用于将生物固体转化为类原油的最佳原料性能。通过分析确定了包括水含量,灰分含量,颗粒密度,堆积密度,孔隙率和粒度在内的原料性质,这对于反应器设计是有用的数据。本研究中提供的数据使用分批沉降实验和泵送研究分析了生物固体的行为。就原料浆液的稳定性和可泵送性而言,评估了生物固体浆液的粒度和固体浓度对可加工性的影响。将具有60 w / w%干固体的生物固体浆料确定为在30分钟的观察期内未显示出可见沉降特性的最小固体浓度。使用实验室规模的蠕动泵,用介于30 w / w%至60 w / w%的干生物固体之间的浆液实现了可泵送性。运输生物固体浆料所需的泵送功率随着固体浓度的增加而呈指数增长。将具有60 w / w%干固体的生物固体浆料确定为在30分钟的观察期内未显示出可见沉降特性的最小固体浓度。使用实验室规模的蠕动泵,用介于30 w / w%至60 w / w%的干生物固体之间的浆液实现了可泵送性。运输生物固体浆料所需的泵送功率随着固体浓度的增加而呈指数增长。将具有60 w / w%干固体的生物固体浆料确定为在30分钟的观察期内未显示出可见沉降特性的最小固体浓度。使用实验室规模的蠕动泵,用介于30 w / w%至60 w / w%的干生物固体之间的浆液实现了可泵送性。运输生物固体浆料所需的泵送功率随着固体浓度的增加而呈指数增长。

更新日期:2020-08-24
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