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首页> 外文期刊>Journal of Cleaner Production >Life-cycle impact and exergy based resource use assessment of torrefied and non-torrefied briquette use for heat and electricity generation
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Life-cycle impact and exergy based resource use assessment of torrefied and non-torrefied briquette use for heat and electricity generation

机译：生命周期影响和基于火用的对用于热和发电的焙烤和非焙烤型煤的资源利用评估

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Forest residue biomass can be used as bioenergy feedstock, however, issues associated with its properties including low density and high moisture content constrains its valorization. Using mobile conversion technologies that can operate in remote areas and are capable of converting forest residues into high quality energy products can address the issues associated with its valorization for renewable energy production. This study evaluated environmental sustainability of using an integrated novel system of semi-mobile biomass conversion technologies (BCTs) to utilize low-value forest residue biomass as high value bioenergy products. A cradle-to-grave life cycle assessment (LCA) and resource use assessment on a unit-process level was conducted for two bio-products: nontorrefied briquettes (NTB) and torrefied briquettes (TOB). Their use for production of useful thermal energy in wood stoves for domestic heating and electricity at power plants were investigated along with their alternatives. The analyses were performed with SimaPro 8.5 using the DATASMART database. The impact assessment results showed a notable decrease in global warming (GW) impact when substituting fossil fuels with these two bioproducts. Specifically, for domestic heating on an equivalent energy basis, a 50% substitution of propane with NTB and TOB showed GHG emission reductions of 46% and 41%, respectively. For electricity generation, 10% cofiring at coal power plant with NTB and TOB showed GHG emission reductions of 6% and 8%, respectively. For the TOB supply chain, a large portion of the GW impact of the came from the torrefaction process and followed by the drying process. This was due to the propane use in these processes. Comparative analysis showed that near-woods biomass conversion for TOB production instead of processing feedstock at an in-town facility with access to grid electricity found 48%-55% lower GW impact for both electricity and heat generation scenarios, respectively. Resourced footprint analysis showed that most exergy extraction from the natural environment came from the drying process for NTB supply chain. In the TOB product system, torrefaction was the major contributor. (C) 2019 Elsevier Ltd. All rights reserved.
机译：森林残余生物量可以用作生物能源原料，但是，与其性质相关的问题（包括低密度和高水分含量）限制了其价值。使用可以在偏远地区运行并能够将森林残留物转化为高质量能源产品的移动转化技术，可以解决与其利用可再生能源生产定价相关的问题。这项研究评估了使用半移动生物质转化技术（BCT）的集成新型系统将低价值的森林残留物生物质用作高价值的生物能源产品的环境可持续性。对两种生物产品进行了从摇篮到坟墓的生命周期评估（LCA）和资源使用评估，这是两种生物产品：非焙烧煤球（NTB）和焙烧煤球（TOB）。对它们在发电厂中用于家庭取暖和用电的柴炉中产生有用的热能的用途及其替代品进行了研究。使用DATASMART数据库，使用SimaPro 8.5进行了分析。影响评估结果显示，用这两种生物产品替代化石燃料后，全球变暖（GW）的影响显着降低。具体来说，对于以等效能源为基础的家庭供暖，用NTB和TOB替代丙烷50％时，温室气体排放量分别减少了46％和41％。在发电方面，燃煤电厂与NTB和TOB共燃10％，显示温室气体排放量分别减少了6％和8％。对于TOB供应链，很大一部分GW的GW影响来自烘焙过程，然后是干燥过程。这是由于在这些过程中使用了丙烷。对比分析表明，在有市电的市镇设施中，近木材生物量转化为TOB生产而不是加工原料，发现在发电和供热情况下，GW影响分别降低了48％-55％。资源足迹分析表明，从自然环境中提取的大部分火用来自NTB供应链的干燥过程。在TOB产品系统中，烘焙是主要贡献者。 （C）2019 Elsevier Ltd.保留所有权利。

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