Faculty of Engineering, Department of Mechanical Engineering, 10-203 Donadeo Innovation Centre for Engineering, 9211 116 Street NW, Edmonton, Alberta T6G 1H9, Canada.
Faculty of Engineering, Department of Mechanical Engineering, 10-203 Donadeo Innovation Centre for Engineering, 9211 116 Street NW, Edmonton, Alberta T6G 1H9, Canada.
Water Res. 2016 Oct 1;102:330-345. doi: 10.1016/j.watres.2016.06.045. Epub 2016 Jun 21.
The conversion of lignocellulosic biomass to biofuel requires water. This study is focused on the production of hydrogenation-derived renewable diesel (HDRD) from lignocellulosic biomass. Although there has been considerable focus on the assessment of greenhouse gas (GHG) emissions, there is limited work on the assessment of the life cycle water footprint of HDRD production. This paper presents a life cycle water consumption study on lignocellulosic biomass to HDRD via pyrolysis and hydrothermal liquefaction (HTL) processes. The results of this study show that whole tree (i.e., tree chips) biomass has water requirements of 497.79 L/MJ HDRD and 376.16 L/MJ HDRD for production through fast pyrolysis and the HTL process, respectively. Forest residues (i.e., chips from branches and tops generated during logging operations) have water requirements of 338.58 L/MJ HDRD and 255.85 L/MJ HDRD for production through fast pyrolysis and the HTL process, respectively. Agricultural residues (i.e., straw from wheat, oats, and barley), which are more water efficient, have water requirements of 83.7 L/MJ HDRD and 59.1 L/MJ HDRD through fast pyrolysis and the HTL process, respectively. Differences in water use between feedstocks and conversion processes indicate that the choices of biomass feedstock and conversion pathway water efficiency are crucial factors affecting water use efficiency of HDRD production.
从木质纤维素生物质生产加氢衍生可再生柴油（HDRD）需要水。本研究主要关注木质纤维素生物质生产 HDRD 的过程。尽管已经对温室气体（GHG）排放进行了大量评估，但对 HDRD 生产的生命周期足迹评估工作有限。本文通过热解和水热液化（HTL）工艺对木质纤维素生物质生产 HDRD 的生命周期水消耗进行了研究。研究结果表明，整树（即木屑）生物质通过快速热解和 HTL 工艺生产 HDRD 的水需求量分别为 497.79 L/MJ 和 376.16 L/MJ。森林残留物（即伐木作业中产生的树枝和树顶木屑）通过快速热解和 HTL 工艺生产 HDRD 的水需求量分别为 338.58 L/MJ 和 255.85 L/MJ。农业残留物（即小麦、燕麦和大麦的秸秆）用水量较少，通过快速热解和 HTL 工艺生产 HDRD 的水需求量分别为 83.7 L/MJ 和 59.1 L/MJ。原料和转化工艺之间的用水差异表明，生物质原料和转化途径的用水效率选择是影响 HDRD 生产用水效率的关键因素。
