This research investigates the preparation of Ni-Co/CeO₂ catalysts based on impregnation and hydrothermal treatment methods for the hydrogen and valuable fuels generation from the steam reforming and cracking reactions of polyethylene terephthalate (PET) waste liquefied in phenol. PET plastic waste is environmentally harmful, mostly when it eliminated by burning or landfilling. Therefore, in this study, this waste has been dissolved in phenol for hydrogen and liquid fuel generation via catalytic steam reforming and cracking reactions. Complementary characterization techniques such as XRD, BET, FTIR, SEM, TEM, EDX, H₂-TPR, CO₂-TPD, NH₃-TPD, ICP, CHNS and TGA were used to correlate surface structure and functionality to catalytic performance of the catalysts. The hydrothermal route leads to higher catalyst activity and stability against a by-product formation such as coke, which approved by time on stream process, TGA and CHNS analysis. For an instant, at 700 °C of the catalytic reaction, impregnation method cause to achieve 72.8 % of phenol conversion and 56 % of hydrogen yield, while these factors increased when conducting the hydrothermal treatment to 83.8 % and 76 %, respectively. Analysis of liquid products obtained from GCMS illustrated that valuable components such as dibenzofuran, 2-methyl phenol and benzene were produced from PET cracking and phenol steam reforming reactions. This phenomenon is a vital idea to solve plastic waste recycling issues.

本研究研究了基于浸渍和水热处理方法制备Ni-Co / CeO ₂催化剂的方法，该方法用于将苯酚液化的聚对苯二甲酸乙二醇酯（PET）的蒸汽重整和裂化反应产生的氢气和有价值的燃料。PET塑料废料对环境有害，大部分是通过焚烧或掩埋消除的。因此，在这项研究中，该废物已通过催化蒸汽重整和裂化反应溶解在苯酚中，以产生氢气和液体燃料。补充表征技术，例如XRD，BET，FTIR，SEM，TEM，EDX，H ₂ -TPR，CO ₂ -TPD，NH ₃-TPD，ICP，CHNS和TGA用于将表面结构和功能与催化剂的催化性能相关联。水热路线导致更高的催化剂活性和更高的抗副产物形成（如焦炭）的稳定性，焦炭经生产时间，TGA和CHNS分析得到认可。在700℃的催化反应中，浸渍法使苯酚的转化率达到72.8％，氢产率达到56％，而进行水热处理时，这些因素分别增加到83.8％和76％。对从GCMS获得的液体产物的分析表明，PET裂解和苯酚蒸汽重整反应可生成有价值的组分，例如二苯并呋喃，2-甲基苯酚和苯。这种现象是解决塑料废料回收问题的重要思想。