Abstract Steam-gasification of linear low-density polyethylene (LLDPE) waste to hydrogen-rich gas has been studied systematically over nickel (10 wt.%) loaded on a variety of supports (Al2O3, CeO2, and CeO2-ZrO2) synthesized using a novel solvent deficient method (SDM). The hydrogen selectivity order of the catalysts was reported as Ni/CeO2-ZrO2>Ni/CeO2>Ni/Al2O3. The highest catalytic H2 selectivity of the Ni/CeO2-ZrO2 catalyst was reported to be ∼76 vol.%, and was attributed to the smaller nickel crystals that were finely dispersed on the support, and to formation of Ce1-xZrxO2-δ solid solutions. The Ce1-xZrxO2-δ solid solution in the Ni/CeO2-ZrO2 catalyst was observed to be bi-functional, thus reflecting the acceleration of the water gas shift and the oxidation of carbon to CO and CO2. The better resistance of the Ni/CeO2-ZrO2 catalyst towards coke deposition also indicated its potential for commercial-scale applications for the steam gasification of plastics. Therefore, this research provides an advanced route to recycle LLDPE plastic waste into hydrogen fuel, which presents both economical and environmental benefits.

中文翻译：

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在高活性 Ni/CeO2-ZrO2 催化剂上线性低密度聚乙烯气化以增强产氢

摘要 线性低密度聚乙烯 (LLDPE) 废物蒸汽气化成富氢气体已被系统地研究了镍 (10 wt.%) 负载在各种载体 (Al2O3、CeO2 和 CeO2-ZrO2) 上使用合成的新的溶剂缺乏法（SDM）。催化剂的氢选择性顺序为Ni/CeO2-ZrO2>Ni/CeO2>Ni/Al2O3。据报道，Ni/CeO2-ZrO2 催化剂的最高催化 H2 选择性为~76 vol.%，这归因于精细分散在载体上的较小的镍晶体，以及 Ce1-xZrxO2-δ 固溶体的形成. 观察到 Ni/CeO2-ZrO2 催化剂中的 Ce1-xZrxO2-δ 固溶体是双功能的，从而反映了水煤气变换和碳氧化成 CO 和 CO2 的加速。Ni/CeO2-ZrO2 催化剂对焦炭沉积的更好抵抗也表明其在塑料蒸汽气化的商业规模应用中的潜力。因此，这项研究提供了一种将 LLDPE 塑料废物回收为氢燃料的先进途径，具有经济和环境效益。