Catalytic pyrolysis of raw and hydrothermally carbonized Chlamydomonas debaryana microalgae for denitrogenation and production of aromatic hydrocarbons
Catalytic pyrolysis of raw and hydrothermally carbonized Chlamydomonas debaryana microalgae for denitrogenation and production of aromatic hydrocarbons
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DOI：
10.1016/j.fuel.2018.04.163
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发表时间：
2018-09
期刊：
影响因子：
7.4
通讯作者：
E. Ansah;Lijun Wang;Bo Zhang;A. Shahbazi
中科院分区：
文献类型：
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作者：
E. Ansah;Lijun Wang;Bo Zhang;A. Shahbazi
研究了活性炭和β-沸石催化剂作用下，生的和水热处理后的德氏衣原体的热解。在没有催化剂的情况下，原始藻类和HTC处理的藻类的热解产生的单芳烃产率相对较低，在600 °C下获得的最佳产率分别为11.2%和12.0%。在600 °C和800 ° C下，来自AC催化的生藻类和HTC处理的藻类的热解的单芳烃的最大产率分别为43.8%和43.5%，相比之下，来自β-沸石催化的热解的最大产率分别为32.3%和32.7%。然而，β-沸石催化的热解产生更高的总烃（芳香族+脂肪族）的产率为原料和HTC藻类相比，AC催化的热解。这意味着虽然β-沸石在产生总烃含量方面更有效，但AC在含氧化合物的芳构化方面更有效。HTC预处理与催化裂解相结合可有效降低生物油中的氮含量。在600 °C下，HTC处理的藻类的AC催化热解的腈和含氮化合物的产率可以忽略不计，相比之下，在相同温度下使用β-沸石的腈和含氮化合物的产率为8.3%。AC催化剂具有较低的结焦倾向。
Pyrolysis of raw and hydrothermally carbonized (HTC)Chlamydomonas debaryanawith and without activated carbon (AC) or β-zeolite as the catalyst were studied. Monoaromatic hydrocarbon yields from the pyrolysis of raw and HTC treated algae without a catalyst were relatively low at optimum yields of 11.2% and 12.0% obtained at 600 °C, respectively. The maximum yields of monoaromatic hydrocarbons from the AC catalyzed pyrolysis of raw and HTC treated algae were 43.8% obtained at 600 °C and 43.5% obtained at 800 °C, respectively, compared to 32.3% and 32.7% for the maximum yields from the β-zeolite catalyzed pyrolysis at 500 °C and 600 °C, respectively. However, β-zeolite catalyzed pyrolysis produced higher yields of total hydrocarbons (aromatic + aliphatic) for raw and HTC algae compared to AC catalyzed pyrolysis. This means while β-zeolite was more effective in producing total hydrocarbon content, AC was more effective in aromatization of oxygenates. The combination of HTC pretreatment and catalytic pyrolysis were effective in reducing nitrogen content in bio-oil. The yields of nitriles and nitrogenous compounds were negligible for the AC catalyzed pyrolysis of HTC treated algae at 600 °C, compared to 8.3% using the β-zeolite at the same temperature. The AC catalyst had a lower tendency towards coking.