A computer casing plastic waste containing brominated flame retardants (BFRs) was pyrolyzed in a two-stage vertical quartz tube reactor using iron and nickel metals modified MCM-41 catalysts. Various catalysts with different ratios of Fe and Ni were prepared and utilized to study their catalytic performance. At the presence of 20%Ni/MCM-41 catalyst, the pyrolytic yield of oil and gas reached maximum values of 49.9 wt% and 13.8 wt% respectively. The co-existence of Fe and Ni showed synergistic effect on oil composition by promoting the formation of valuable single ring hydrocarbons. With regard to the 15%Fe-5%Ni/MCM-41, 10%Fe-10%Ni/MCM-41 and 5%Fe-15%Ni/MCM-41 catalysts, the production of single ring hydrocarbons were 64.58%, 65.93% and 64.74% respectively. The bimetallic catalysts also exhibited remarkable effect on eliminating bromine from pyrolytic oil. At the presence of Fe-Ni/MCM-41, the bromine in pyrolytic oil was reduced to below 4 wt% compared with 10 wt% without catalyst. Higher amounts of Fe in the catalyst is beneficial for the debromination efficiency. The debromination process by the Fe-Ni/MCM-41 may be realized by these different mechanisms: catalytic cracking of organobromines, reaction of loaded metal oxides with HBr/SbBr3, and deposition of organobromines on the surface of catalyst.

中文翻译：

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Fe-Ni双金属MCM-41催化剂对废旧计算机外壳塑料两阶段热解的催化性能和脱溴作用。

使用铁和镍金属改性的MCM-41催化剂，在两级立式石英管反应器中将包含溴化阻燃剂（BFR）的计算机外壳塑料废料热解。制备了具有不同比例的铁和镍的各种催化剂，并用于研究其催化性能。在20％Ni / MCM-41催化剂存在下，油气的热解收率分别达到49.9wt％和13.8wt％的最大值。Fe和Ni的共存通过促进有价值的单环烃的形成对油的组成表现出协同作用。对于15％Fe-5％Ni / MCM-41、10％Fe-10％Ni / MCM-41和5％Fe-15％Ni / MCM-41催化剂，单环烃的产量为64.58％ ，分别为65.93％和64.74％。双金属催化剂还显示出从热解油中除去溴的显着效果。在Fe-Ni / MCM-41的存在下，热解油中的溴减少到4 wt％以下，而无催化剂的溴减少到10 wt％。催化剂中较高的铁含量有利于脱溴效率。Fe-Ni / MCM-41的脱溴过程可通过以下不同机制实现：有机溴的催化裂化，负载的金属氧化物与HBr / SbBr3的反应以及有机溴在催化剂表面的沉积。