通过松木屑和废聚苯乙烯泡沫共热解改善生物原油性质。
Improvement of bio-crude oil properties via co-pyrolysis of pine sawdust and waste polystyrene foam.
机构信息
Department of Environmental and Energy Mechanical Engineering, University of Science and Technology, Daejeon, 34113, South Korea.
Department of Environmental and Energy Mechanical Engineering, University of Science and Technology, Daejeon, 34113, South Korea; Department of Clean Fuel & Power Generation, Korea Institute of Machinery and Materials, Daejeon, 34103, South Korea.
出版信息
J Environ Manage. 2019 May 1;237:24-29. doi: 10.1016/j.jenvman.2019.02.039. Epub 2019 Feb 16.
Conversion technology of solid biomass to liquid fuel, named bio-crude oil, has been researched widely for the production of renewable energy to replace fossil fuel oil. As the result of many admirable researches, fast pyrolysis technology for bio-crude oil production is close to commercialization. However, bio-crude oil has unsatisfactory properties compared to general petroleum oil, for instance, low heating value, high water content, and high viscosity. In this study, pine sawdust (SD) biomass was co-pyrolyzed with waste polystyrene foam (WPSF), which was expected to improve the bio-crude oil quality due to high heating value and non-oxygen composition of polystyrene. The co-pyrolysis experiment was conducted in a bubbling fluidized bed reactor under the following conditions: temperature of 500 °C which was chosen based on the results from thermogravimetric analysis of SD and WPSF, nitrogen flow rate of 20-25 L/min., and feeding rate of 200 g/hr. Various mixing ratios of SD/WPSF by weight percentage were tested as follows: 100/0, 95/5, 90/10, 85/15, 80/20, 75/25, 70/30, 60/40, 50/50, 25/75, 0/100. Experimental results showed that in case of only SD feeding the bio-crude oil yield and higher heating value (HHV) were 48.83 wt% and 17.81 MJ/kg respectively. By contrast, oil yield and HHV in case of 25% SD with 75% WPSF mixture were 63.31 wt% and 39.65 MJ/kg respectively. Additional analysis showed that water content, and acetic acid concentration of bio-crude oil from co-pyrolysis of SD/WPSF mixture were decreased almost proportionally with the increasing WPSF ratio. Furthermore, measured values of water content, and acetic acid concentration were lower than the calculated values by linear interpolation, which means that the synergistic effect between SD and WPSF was achieved during the co-pyrolysis. In conclusion, co-pyrolysis of SD and WPSF was found as a promising solution to improve bio-crude oil quality. With this technology, the industrial growth of bio-crude oil area is expected as well as waste plastic.
固体生物质向液体燃料（称为生物原油）的转化技术已广泛应用于可再生能源的生产，以替代化石燃料油。由于许多令人瞩目的研究，用于生产生物原油的快速热解技术已接近商业化。然而，与普通石油相比，生物原油的性能并不理想，例如低热值、高含水量和高粘度。在本研究中，松木锯末（SD）生物质与废聚苯乙烯泡沫（WPSF）共热解，由于聚苯乙烯的高热值和非含氧成分，预计可以改善生物原油的质量。共热解实验在鼓泡流化床反应器中进行，条件如下：温度为 500°C，这是基于 SD 和 WPSF 的热重分析结果选择的，氮气流量为 20-25 L/min，进料速率为 200 g/hr。按重量百分比测试了各种 SD/WPSF 混合比，如下所示：100/0、95/5、90/10、85/15、80/20、75/25、70/30、60/40、50/50、25/75、0/100。实验结果表明，仅进料 SD 时，生物原油产率和高位发热值（HHV）分别为 48.83 wt%和 17.81 MJ/kg。相比之下，进料 25% SD 和 75% WPSF 混合物时，生物原油的产率和 HHV 分别为 63.31 wt%和 39.65 MJ/kg。进一步分析表明，SD/WPSF 混合物共热解所得生物原油的水分含量和乙酸浓度几乎随 WPSF 比例的增加而成比例下降。此外，实测的水分含量和乙酸浓度低于线性插值计算值，这意味着 SD 和 WPSF 在共热解过程中存在协同效应。总之，发现 SD 和 WPSF 的共热解是提高生物原油质量的一种有前途的方法。通过这项技术，预计生物原油领域和废塑料的工业增长将得到实现。
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