Hydrocracking of virgin and post-consumer polymers
Hydrocracking of virgin and post-consumer polymers
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DOI：
10.1016/j.micromeso.2021.110912
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发表时间：
2021-01-28
影响因子：
5.2
通讯作者：
Garforth, Arthur A.
中科院分区：
文献类型：
--
作者：
bin Jumah, Abdulrahman;Tedstone, Aleksander A.;Garforth, Arthur A.
随着人们对聚合物垃圾填埋及其环境释放的日益关注，双功能沸石加氢裂化是聚合物回收的有效途径之一。在330℃、20 bar H-2和30 min的温和反应条件下，用1% Pt浸渍的β沸石显示出高转化率的单一和混合流的原生和消费后聚合物，LDPE、HDPE、PP和PS。PE和PP流体具有相似的低分子量碳氢化合物混合物，对气体（通常为C-3-C-4）具有更高的选择性，并且具有较高的等正烷烃比。在这些温和的条件下，PS很容易转化为富含芳香的产品，并证明了作为苯和乙苯的来源的能力，可作为进一步聚合物生产的原料。加1% Pt的脱铝沸石USY提高了对液体产物的选择性，产生了更多的石脑油（C-5-C-12）和更重的液体（C-13-C-20）。
With the growing concern around polymer waste sent to landfill and its environmental release, one effective route for polymer recycling is hydrocracking over bifunctional zeolites. Zeolite Beta impregnated with 1% Pt has demonstrated high conversion of single and mixed streams of virgin and post-consumer polymers, LDPE, HDPE, PP and PS under mild reaction conditions of 330 degrees C, 20 bar H-2 and a 30 min reaction time. The PE and PP streams giving a similar mix of low molecular weight hydrocarbons with higher selectivity toward gases (typically, C-3-C-4) and also, obtaining high iso-to normal paraffin ratio. PS was readily converted into an aromatic-rich product under these mild conditions and demonstrated the ability to be a source of benzene and ethylbenzene for use as raw materials in further polymer production. Dealuminated zeolite USY with 1% Pt increased the selectivity toward liquid products and resulting in more naphtha (C-5-C-12) and heavier liquids (C-13-C-20).