Zhao Zhigang, Li Zheng, Zhang Xiangkun, Li Tan, Li Yuqing, Chen Xingkun, Wang Kaige
State Key Laboratory of Clean Energy Utilization, Zhejiang University, NO.38 Zheda Road, Hangzhou, 310027, China.
Hangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Gengwen Road, Hangzhou, 311231, China.
Environ Pollut. 2022 Nov 15;313:120154. doi: 10.1016/j.envpol.2022.120154. Epub 2022 Sep 9.
The catalytic hydrogenolysis of a typical model compound of mulching film waste, polyethylene, was investigated as a potential way to improve economic efficiency of mulching film recycling. Nickel-based heterogeneous catalysts are proposed for polyethylene hydrogenolysis to produce liquid hydrocarbons. Among catalysts supported on various carriers, Ni/SiO catalyst shows the highest activity which may due to the interactions between nickel and silica with the formation of nickel phyllosilicate. As high as 81.18% total gasoline and diesel range hydrocarbon was obtained from the polyethylene hydrogenolysis at relatively mild condition of 280 °C, and 3 MPa cold hydrogen pressure. The result is comparable to what have been reported in previous studies using noble metal catalysts. The gasoline and diesel range hydrocarbon are n-alkanes with a distribution at a range of C-C. The gas products are primarily CH along with a small amount of CH and CH. High yield of CH as much as 9.68% was observed for the cleavage of molecule occurs along the alkane chain.
研究了地膜废弃物典型模型化合物聚乙烯的催化氢解反应，将其作为提高地膜回收经济效益的一种潜在方法。提出了用于聚乙烯氢解以生产液态烃的镍基多相催化剂。在各种载体负载的催化剂中，Ni/SiO催化剂表现出最高的活性，这可能是由于镍与二氧化硅之间的相互作用形成了镍层状硅酸盐。在280℃和3MPa冷氢压力的相对温和条件下，聚乙烯氢解反应得到了高达81.18%的汽油和柴油馏分烃。该结果与先前使用贵金属催化剂的研究报道相当。汽油和柴油馏分烃为碳数分布在一定范围内的正构烷烃。气体产物主要是CH，还有少量的CH和CH。对于沿着烷烃链发生的分子裂解，观察到高达9.68%的CH高产率。
