MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.
SINTEF Energy Research, Trondheim, Norway.
J Environ Manage. 2019 Jun 1;239:306-315. doi: 10.1016/j.jenvman.2019.03.073. Epub 2019 Mar 24.
Soot is an important toxic pollutant generated during high-temperature incineration of solid waste (i.e., biomass and plastic waste) under air-lean conditions, and has a great impact on flame radiation. The main objective of this work is to study the synergistic effect of biomass and polyurethane co-pyrolysis on soot formation at high temperatures (1100-1250 °C). The effects of temperature, biomass species, and co-pyrolysis ratio on the yield, morphology, composition and reactivity of soot particles are studied. Results show that under controlled co-pyrolysis conditions, the measured soot yield from co-pyrolysis of biomass and polyurethane is lower than the theoretical value by weight average, while the particle size distribution tends to concentrate on a smaller diameter range. The degree of synergistic effect increases with the increasing biomass ratio (0-50 wt%) and decreasing pyrolysis temperature. Wood in co-pyrolysis presents a stronger synergistic effect on soot yields than straw co-pyrolysis does. Degree of synergistic effect on soot oxidation reactivity depends much on the biomass addition ratio but less on pyrolysis temperature. At 10 wt% straw addition ratio, co-pyrolysis exerts a negative synergistic effect on soot oxidation reactivity, while the synergistic effect turns significantly positive when the straw addition ratio increases to 50 wt%.
煤烟是在贫氧条件下高温焚烧固体废弃物（即生物质和塑料废物）时产生的一种重要的有毒污染物，对火焰辐射有很大影响。本工作的主要目的是研究生物质和聚氨酯共热解在高温（1100-1250°C）下对煤烟形成的协同作用。研究了温度、生物质种类和共热解比对煤烟颗粒产率、形貌、组成和反应性的影响。结果表明，在控制共热解条件下，从生物质和聚氨酯共热解中测量的煤烟产率按重量平均低于理论值，而粒径分布倾向于集中在较小的直径范围内。协同效应的程度随生物质比例（0-50 wt%）的增加和热解温度的降低而增加。在共热解中，木材对煤烟产率的协同效应强于秸秆共热解。对煤烟氧化反应性的协同效应在很大程度上取决于生物质的添加比例，但对热解温度的依赖性较小。在 10 wt%秸秆添加比例下，共热解对煤烟氧化反应性表现出负协同效应，而当秸秆添加比例增加到 50 wt%时，协同效应显著变为正协同效应。
