Small-scale biomass gasification CHP utilisation in industry: Energy and environmental evaluation

Small-scale biomass gasification CHP utilisation in industry: Energy and environmental evaluation
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小型生物质气化热电联产在工业中的利用:能源与环境评价

DOI:
10.1016/j.seta.2014.02.002
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发表时间:
2014
影响因子:
8
通讯作者:
Adams P
Adams P
中科院分区:
工程技术2区
文献类型:
--
作者:
Adams P

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生物质气化被认为是一种用于废物管理和生产可再生燃料的可持续能源技术。利用生命周期评价(LCA)和净能量分析技术,本研究量化的能量,资源和排放流。本研究的目的是评估利用木材废料进行生物质气化的净能量和潜在的环境影响。本文概述了一个案例研究,使用废木材从工厂用于气流床气化热电联产厂。结果表明,环境影响可能来自毒性,颗粒物和资源消耗。毒性是一个潜在的问题,通过处理灰。颗粒物来自合成气的燃烧,因此需要有效的气体清洁和排放控制。对资源枯竭的评估表明,天然气、电力、化石燃料、金属和水都是该系统的重要组成部分。当仅考虑电力时,能量增益比为4.71 MJ delivered/MJ primary,如果利用100%的可用热量,则增加到13.94 MJ delivered/MJ primary。温室气体排放量很低(7-15克CO2-e/千瓦时),但如果生物质原料不是废物,需要种植和运输,温室气体排放量就会增加。如果可以克服高资本成本和操作困难,并且可以获得一致的原料来源,则小规模生物质气化是一种有吸引力的技术。
Biomass gasification is regarded as a sustainable energy technology used for waste management and producing renewable fuel. Using the techniques of life cycle assessment (LCA) and net energy analysis this study quantifies the energy, resource, and emission flows. The purpose of the research is to assess the net energy produced and potential environmental effects of biomass gasification using wood waste. This paper outlines a case study that uses waste wood from a factory for use in an entrained flow gasification CHP plant. Results show that environmental impacts may arise from toxicity, particulates, and resource depletion. Toxicity is a potential issue through the disposal of ash. Particulate matter arises from the combustion of syngas therefore effective gas cleaning and emission control is required. Assessment of resource depletion shows natural gas, electricity, fossil fuels, metals, and water are all crucial components of the system. The energy gain ratio is 4.71MJdelivered/MJprimarywhen only electricity is considered, this increases to 13.94MJdelivered/MJprimaryif 100% of the available heat is utilised. Greenhouse gas emissions are very low (7–15 g CO2-e/kWhe) although this would increase if the biomass feedstock was not a waste and needed to be cultivated and transported. Overall small-scale biomass gasification is an attractive technology if the high capital costs and operational difficulties can be overcome, and a consistent feedstock source is available.
DOI: --
发表时间: 2010
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DOI: 10.1016/0306-2619(78)90003-x
发表时间: 1978
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