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首页> 外文期刊>Energies >Life-Cycle Energy Use and Greenhouse Gas Emissions Analysis for Bio-Liquid Jet Fuel from Open Pond-Based Micro-Algae under China Conditions
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Life-Cycle Energy Use and Greenhouse Gas Emissions Analysis for Bio-Liquid Jet Fuel from Open Pond-Based Micro-Algae under China Conditions

机译：中国条件下基于池塘的微藻类生物液体喷气燃料的生命周期能源使用和温室气体排放分析

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摘要

A life-cycle analysis (LCA) of greenhouse gas (GHG) emissions and energy use was performed to study bio-jet fuel (BJF) production from micro-algae grown in open ponds under Chinese conditions using the Tsinghua University LCA Model (TLCAM). Attention was paid to energy recovery through biogas production and cogeneration of heat and power (CHP) from the residual biomass after oil extraction, including fugitive methane (CH4) emissions during the production of biogas and nitrous oxide (N2O) emissions during the use of digestate (solid residue from anaerobic digestion) as agricultural fertilizer. Analyses were performed based on examination of process parameters, mass balance conditions, material requirement, energy consumptions and the realities of energy supply and transport in China (i.e., electricity generation and heat supply primarily based on coal, multiple transport modes). Our LCA result of the BJF pathway showed that, compared with the traditional petrochemical pathway, this new pathway will increase the overall fossil energy use and carbon emission by 39% and 70%, respectively, while decrease petroleum consumption by about 84%, based on the same units of energy service. Moreover, the energy conservation and emission reduction benefit of this new pathway may be accomplished by two sets of approaches: wider adoption of low-carbon process fuels and optimization of algae cultivation and harvest, and oil extraction processes.
机译：使用清华大学LCA模型（TLCAM）对温室气体（GHG）排放和能源使用进行了生命周期分析（LCA），以研究在中国条件下在开放条件下在开放池塘中生长的微藻产生的生物喷气燃料（BJF）。 。重视通过沼气生产以及采油后残余生物质的热电联产（CHP）进行能量回收，包括在沼气和一氧化二氮生产过程中产生的挥发性甲烷（CH 4 ）排放（消化液（厌氧消化产生的固体残留物）用作农业肥料时的N 2 O）排放。基于对工艺参数，质量平衡条件，材料要求，能源消耗以及中国能源供应和运输的现实情况（即主要基于煤炭的发电和供热，多种运输方式）的检查来进行分析。我们的BJF途径的LCA结果表明，与传统的石化途径相比，该新途径将分别使化石能源的总体使用量和碳排放量分别增加39％和70％，同时将石油消耗量减少约84％，基于相同单位的能源服务。此外，这一新途径的节能减排优势可以通过两种方法来实现：低碳工艺燃料的广泛采用以及藻类的栽培和收获以及采油工艺的优化。

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