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Synthesis of a High-Stability Nanosized Pt-Loaded MgAl2O4 Catalyst for n-Decane Cracking with Enhanced Activity and Durability
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-02-28 , DOI: 10.1021/acs.iecr.9b06515 Yi Jiao 1 , Ting Chen 2 , Linlin Wang 2 , Peng Yao 1 , Jun Zhang 2 , Yusheng Chen 3 , Yaoqiang Chen 3 , Jianli Wang 3
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-02-28 , DOI: 10.1021/acs.iecr.9b06515 Yi Jiao 1 , Ting Chen 2 , Linlin Wang 2 , Peng Yao 1 , Jun Zhang 2 , Yusheng Chen 3 , Yaoqiang Chen 3 , Jianli Wang 3
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Catalytic activity and stability, reflected in high conversion, heat sink, and time on stream, are the major concerns of endothermic hydrocarbon fuel cracking. In this work, we synthesized a stable MgAl2O4 spinel support by the co-precipitation method and a Pt/MgAl2O4 catalyst by the liquid-phase reduction-impregnation method (PMA-V) and incipient-wetness impregnation method (PMA). PMA-V showed a better catalytic activity and stability than PMA. Moreover, the heat sink and stability are significantly superior to the Pt-based catalysts in our previous published works. Through a series of catalyst characterization, we found that the high catalytic activity and stability over PMA-V are owing to the “accessible” Pt active sites with better dispersion and a smaller Pt size, which can efficiently alleviate Pt sintering, stronger metal–support interaction, suitable acidity–alkalinity, and a stable MgAl2O4 spinel structure. The valuable information provided in this work provides an effective approach to improve both catalytic activity and stability for hydrocarbon cracking.
中文翻译：
高稳定纳米铂加载的MgAl的合成2 ø 4催化剂ñ -癸烷开裂与增强的活性和耐久性
催化活性和稳定性反映在高转化率，热沉和生产时间上，是吸热烃燃料裂解的主要问题。在这项工作中，我们通过共沉淀法和Pt / MgAl 2 O 4合成了稳定的MgAl 2 O 4尖晶石载体。液相还原浸渍法（PMA-V）和初湿浸渍法（PMA）制备催化剂。PMA-V比PMA具有更好的催化活性和稳定性。此外，在我们之前发表的论文中，散热器和稳定性明显优于基于Pt的催化剂。通过一系列的催化剂表征，我们发现对PMA-V的高催化活性和稳定性归因于“可访问的” Pt活性位点，具有更好的分散性和较小的Pt尺寸，可有效减轻Pt烧结，更强的金属载体相互作用，合适的酸碱度和稳定的MgAl 2 O 4尖晶石结构。这项工作中提供的有价值的信息为提高催化活性和烃裂化的稳定性提供了一种有效的方法。
更新日期：2020-03-02
中文翻译：
高稳定纳米铂加载的MgAl的合成2 ø 4催化剂ñ -癸烷开裂与增强的活性和耐久性
催化活性和稳定性反映在高转化率，热沉和生产时间上，是吸热烃燃料裂解的主要问题。在这项工作中，我们通过共沉淀法和Pt / MgAl 2 O 4合成了稳定的MgAl 2 O 4尖晶石载体。液相还原浸渍法（PMA-V）和初湿浸渍法（PMA）制备催化剂。PMA-V比PMA具有更好的催化活性和稳定性。此外，在我们之前发表的论文中，散热器和稳定性明显优于基于Pt的催化剂。通过一系列的催化剂表征，我们发现对PMA-V的高催化活性和稳定性归因于“可访问的” Pt活性位点，具有更好的分散性和较小的Pt尺寸，可有效减轻Pt烧结，更强的金属载体相互作用，合适的酸碱度和稳定的MgAl 2 O 4尖晶石结构。这项工作中提供的有价值的信息为提高催化活性和烃裂化的稳定性提供了一种有效的方法。
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