System development and environmental performance analysis of a solar driven supercritical water gasification pilot plant for hydrogen production using life cycle assessment approach
System development and environmental performance analysis of a solar driven supercritical water gasification pilot plant for hydrogen production using life cycle assessment approach
复制标题
使用生命周期评估方法进行太阳能驱动超临界水气化制氢试验装置的系统开发和环境绩效分析
DOI：
10.1016/j.enconman.2019.01.041
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发表时间：
2019-03-15
影响因子：
10.4
通讯作者：
Lu, Na
中科院分区：
文献类型：
--
作者：
Chen, Jingwei;Xu, Wenwen;Lu, Na
生物质超临界水气化是一种很有前途的制氢技术。在动力工程多相流国家重点实验室建设了一座新型太阳能超临界水处理中试装置（SCWG-Solar），使超临界水处理向产业化迈进了重要一步。生物质和水的总吞吐量设计为1 t/h。采用生命周期评价（LCA）方法对SCWG-Solar工艺的环境性能及其主要环境负荷进行了评价。使用SimaPro V8.2.3软件和程序中的Ecoinvent 3.0数据库进行LCA。对关键参数进行了敏感性分析，以确定SCWG-太阳能工艺的环境性能增强。LCA结果表明，SCWG-太阳能系统的运行对总环境影响的贡献约为58%。太阳能集中器的建造主要是由于SCWG-太阳能系统的建造而产生的环境排放。通过利用太阳能加热预热器，并将合适的甲烷副产物后处理技术与SCWG-Solar系统相结合，可以减少对环境的影响。GWP随进料生物质浓度的增加而减小，当生物质浓度达到30wt%时，GWP接近最小值。SCWG-太阳能操作的GWP为4.41 kg CO2-eq/kgH（2）（1-MC工艺），与通过两步水分解的太阳能制氢相当。因此，本研究中的LCA表明SCWG-太阳能是一种环保技术，尽管该系统仍有改进的空间。
Supercritical water gasification (SCWG) of biomass is a promising technology for hydrogen production. A novel pilot plant of SCWG that uses solar energy (henceforth SCWG-Solar) was constructed in State Key Laboratory of Multiphase Flow in Power Engineering to take SCWG a significant step closer to industrialization. The total throughput of biomass and water was designed up to 1 t/h. Life cycle assessment (LCA) was conducted to evaluate the environmental performance of SCWG-Solar process and its main environmental burdens. LCA was conducted using the SimaPro V8.2.3 software, and the Ecoinvent 3.0 database within the program. A sensitivity analysis on crucial parameters was performed to determine the environmental performance enhancement of SCWG-Solar process. LCA results showed that the SCWG-Solar system operation contributes approximately 58% to the total environmental impact. The construction of a solar concentrator mostly contributes to the environment emissions from the construction of the SCWG-Solar system. The environmental impact can be reduced by utilizing solar energy heated preheater and combining suitable post-treatment technologies of methane by-products with the SCWG-Solar system. The GWP decreases with the increase of feeding biomass slurry concentration and the GWP is close to a minimum when the biomass concentration reaches 30 wt%. GWP from the SCWG-Solar operation, which is 4.41 kg CO2-eq/kgH(2) for 1-MC process, is comparable to the solar based hydrogen production by two-step water splitting. Hence, the LCA in this study indicates that the SCWG-Solar is an environmentally friendly technology, although the system still has room for improvement.