Abstract

Municipal Solid Waste (MSW) was converted into high-grade solid fuels (biochar) and gaseous product via thermal pyrolysis under pyrolytic gas atmosphere. The experiment was carried out in a packed-bed reactor at the temperature range of 600–800 °C in both atmospheres of N₂ and pyrolytic gas. Gas, liquid, and solid products were analyzed by gas chromatograph and elemental analysis. Amount of biochar obtained from both atmospheres were not significantly different. CH₄ and CO₂ in pyrolytic gas promoted the release of volatile in the MSW, resulting in lower ratio of VM/FC, ca. 0.13. The atomic ratios of O/C and H/C were around 0.02–0.11 and 0.005–0.035, respectively. These values were equivalent to anthracite coal type. On the other hand, the liquid fuel yield under pyrolytic gas condition was found to be higher, compared with that under N₂ condition. In addition, the enhancement of H₂ and CO production was accompanied by the decrease in CH₄ and CO₂ output. Overall, the operating condition at 800 °C or higher with reaction times longer than 4 min were recommended for production of biochar with fuel qualities approaching anthracite coal.

Graphic abstract

中文翻译：

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模拟城市固体废物（SMSW）在热解气体气氛下热解的生物碳和热解气体性质

摘要

在热解气体气氛下通过热解将城市固体废物（MSW）转化为高级固体燃料（biochar）和气态产物。该实验是在N ₂和热解气体气氛中，在温度为600-800°C的填充床反应器中进行的。气体，液体和固体产物通过气相色谱仪和元素分析仪进行分析。从两种气氛中获得的生物炭量没有显着差异。热解气体中的CH ₄和CO ₂促进了MSW中挥发物的释放，从而导致VM / FC的比率降低，约为0.13。O / C和H / C的原子比分别约为0.02-0.11和0.005-0.035。这些值等于无烟煤类型。另一方面，发现热解气体条件下的液体燃料产率高于N ₂条件下的液体燃料产率。另外，H ₂和CO产生的增加伴随着CH ₄和CO ₂输出的减少。总的来说，对于生产燃料质量接近无烟煤的生物炭，建议在800°C或更高的温度下进行反应，反应时间应大于4分钟。

图形摘要