Morphology effect of nano-hydroxyapatite as support for loading Ni in methane dry reforming

Q3 Energy 燃料化学学报 Pub Date : 2023-07-01 DOI:10.1016/S1872-5813(23)60332-9

WANG Yan-bo, HE Lei, LI Wen-cui

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Abstract

In this paper, hydroxyapatite (HAP) with nanorod, nanosheet and nanowire morphologies were synthesized with different surface Ca, O and P distributions. After loading 1.25% of nickel, Ni/HAP-R, Ni/HAP-S and Ni/HAP-W catalysts were obtained and applied for MDR. Among them, the Ni/HAP-R catalyst showed the best performance. The geometric structure, electronic properties and surface basicity of the catalyst were characterized by XRD, N₂ sorption, FT-IR, XPS and CO₂-TPD. It proved that HAP-R possessed the larges surface area, thus beneficial for Ni dispersion to obtain high MDR activity. Meanwhile, it was rich in Ca-O-P which could accelerate the CO₂ activation for coke elimination. TPSR experiments further confirmed that the deep cracking of methane on Ni/HAP-R catalyst was inhibited. However, it could be accelerated in the presence of CO₂ to produce CO and H₂. In this case, Ni/HAP-R catalyst showed excellent anti-coking performance. This study provides inspiration for the design and synthesis of highly stable heterogeneous catalysts.

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纳米羟基磷灰石作为甲烷干重整负载Ni载体的形貌效应

摘要本文合成了具有不同表面Ca、O和P分布的纳米棒、纳米片和纳米线形态的羟基磷灰石(HAP)。负载1.25%的镍后，得到Ni/HAP-R、Ni/HAP-S和Ni/HAP-W催化剂，并应用于MDR。其中，Ni/HAP-R催化剂表现出最好的性能。采用XRD、N2吸附、FT-IR、XPS和CO2-TPD对催化剂的几何结构、电子性能和表面碱度进行了表征。结果表明，HAP-R具有较大的表面积，有利于Ni分散体获得较高的MDR活性。同时，它富含Ca-O-P，可以加速CO2的活化，消除焦炭。TPSR实验进一步证实了甲烷在Ni/HAP-R催化剂上的深度裂解受到抑制。然而，它可以在二氧化碳存在下加速生成CO和H2。在这种情况下，Ni/HAP-R催化剂表现出优异的抗结焦性能。本研究为高稳定性的多相催化剂的设计和合成提供了启示。

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来源期刊

燃料化学学报 Chemical Engineering-Chemical Engineering (all)

CiteScore

2.80

自引率

0.00%

发文量

5825

期刊介绍： Journal of Fuel Chemistry and Technology (Ranliao Huaxue Xuebao) is a Chinese Academy of Sciences(CAS) journal started in 1956, sponsored by the Chinese Chemical Society and the Institute of Coal Chemistry, Chinese Academy of Sciences(CAS). The journal is published bimonthly by Science Press in China and widely distributed in about 20 countries. Journal of Fuel Chemistry and Technology publishes reports of both basic and applied research in the chemistry and chemical engineering of many energy sources, including that involved in the nature, processing and utilization of coal, petroleum, oil shale, natural gas, biomass and synfuels, as well as related subjects of increasing interest such as C1 chemistry, pollutions control and new catalytic materials. Types of publications include original research articles, short communications, research notes and reviews. Both domestic and international contributors are welcome. Manuscripts written in Chinese or English will be accepted. Additional English titles, abstracts and key words should be included in Chinese manuscripts. All manuscripts are subject to critical review by the editorial committee, which is composed of about 10 foreign and 50 Chinese experts in fuel science. Journal of Fuel Chemistry and Technology has been a source of primary research work in fuel chemistry as a Chinese core scientific periodical.