Release of Chlorine and Sulfur during Biomass Torrefaction and Pyrolysis
Release of Chlorine and Sulfur during Biomass Torrefaction and Pyrolysis
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DOI：
10.1021/ef4021262
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发表时间：
2014-06
期刊：
影响因子：
5.3
通讯作者：
S. Saleh;Julie Pauline Flensborg;Tooran Khazraie Shoulaifar;Z. Sárossy;B. B. Hansen-B.;H. Egsgaard;N. Demartini;P. Jensen;P. Glarborg;K. Dam‐Johansen
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文献类型：
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作者：
S. Saleh;Julie Pauline Flensborg;Tooran Khazraie Shoulaifar;Z. Sárossy;B. B. Hansen-B.;H. Egsgaard;N. Demartini;P. Jensen;P. Glarborg;K. Dam‐Johansen
在旋转反应器和固定床反应器中对生物质干燥和热解过程中氯（Cl）和硫（S）的释放进行了实验研究。在150-500 °C的温度范围内，对具有不同化学组成的六种生物质进行了烘焙/热解，所述生物质涵盖了广泛的灰分含量和成灰元素。根据物料平衡和对生物质焙烧前后的分析，计算了氯和硫的相对释放量。在选定的情况下，测量甲烷氯（CH 3Cl）的气体从秸秆烘干进一步进行。在250 °C时首次观察到秸秆中的氯释放，在350 °C时达到峰值，约为60-70%。对释放气体的分析表明，大部分氯以氯甲烷的形式释放。增加秸秆含量的反应器中导致在较低的分数释放的Cl，可能是由于更多的反应位点接触气相Cl物种，导致硒。
The release of chlorine (Cl) and sulfur (S) during biomass torrefaction and pyrolysis has been investigated via experiments in two laboratory-scale reactors: a rotating reactor and a fixed bed reactor. Six biomasses with different chemical compositions covering a wide range of ash content and ash-forming elements were torrefied/pyrolyzed in the temperature range of 150–500 °C. The relative release of chlorine and sulfur was calculated based on mass balance and analysis of the biomass before and after torrefaction. In selected cases, measurement of methyl chloride (CH3Cl) in the gas from straw torrefaction has furthermore been conducted. The release of chlorine from straw was first observed at 250 °C and peaked with about 60–70% at 350 °C. Analysis of the released gas showed that most of the chlorine was released as methyl chloride. Increasing the straw content in the reactor resulted in a lower fractional release of Cl, probably due to more reactive sites in contact with gas phase Cl species leading to se...