Highly Dispersed Nickel Nanoparticles on Hierarchically Ordered Macroporous Al2O3 and Its Catalytic Performance for Steam Reforming of 1-Methyl Naphthalene
Round 1
Reviewer 1 Report
Ms. ID.: catalysts-2024126
Title: Highly dispersed nickel nanoparticles on hierarchically orderer macroporous Al2O3 and its catalytic performance for steam reforming of 1-methyl naphthalene
This manuscript presents an experimental work focused on catalyst development for tar conversion by steam reforming using 1-methyl naphthalene as model compound. This manuscript is suitable for publishing after minor revisions.
Comments:
1.- Revise references and provide the title of the journals.
2.- In section 2.3 Reaction test, the size of catalyst should be indicated. More details about the feeding of 1-methyl naphthalene (1-MN) should be provided. Please indicate the flow rate of 1-MN in the experiments. Moreover, the units of “Reaction rate” equation (7) should be revised. It is not usually referred the reaction rate per mol of fed 1-MN. Probably the reaction rate could be removed because there are no values of this in the manuscript.
3.- Revise and correct the figure caption of Figure 2.
4.- Correct Table 1, the values for MeAl, Ni-MeAl and 0.5K/Ni-MeAl are repeated.
5.- The authors should provide, if it is possible, some quantitative results about H2 consumption and peak temperatures in H2-TPR results. Please, explain better the obtained results.
6.- The authors should provide an explanation about the low value of C-selectivity in gas for MeAl (Table 2).
7.- The authors should comment the water gas shift reaction in steam reforming, page 13.
8.- In the last sentence of page 14 and at the beginning of page 15, the authors explain the difficulty to open the aromatic ring and the majority of the liquid products classified as group (3) for the xK/Ni-MaAl catalyst (Table 2). The authors should comment the high value of liquid products classified as group (1) for the 2K/Ni-MaAl catalyst.
9.- Correct typographical errors through the whole manuscript
- on page 15 change “(Reaction 3)” by “(Reaction 1.3)”
- on page 12 group (1) is not aromatic hydrocarbon.
Author Response
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Reviewer 2 Report
Accept
Author Response
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Reviewer 3 Report
Referee report on “Highly dispersed nickel nanoparticles on hierarchically ordered macroporous Al2O3 and its catalytic performance for steam reforming of 1-methyl naphthalene”
This article is devoted to the study of the effect of a hierarchically ordered macroporous structure of alumina support on the steam reforming of naphthalene.
The results presented by the authors have a sufficient degree of novelty, and the sequence of presentation is logical and scientifically substantiated. In general, the article can be accepted for publication after the authors will provide a proper answer for a few comments/questions that have arisen during a detailed reading of the work.
1. 1. In the introduction, the following problem is completely silent the properties of the macroporous Al2O3, as well as ordinary alumina, depend on point defects and defects on the surface, which were comprehensively studied both theory and experimental and documented in many works. Although such defects can be created in different ways, (including irradiation), their properties are almost the same. See, for example:
Li, Z., & Huang, K. (2007). The effect of high‐temperature annealing on optical properties of porous anodic alumina formed in oxalic acid. Luminescence: The journal of biological and chemical luminescence, 22(4), 355-361.
Shablonin, E., et al. Thermal annealing and transformation of dimer F centers in neutron-irradiated Al2O3 single crystals. Journal of Nuclear Materials, 2021, 543, 152600
2. It is also recommended to discuss the effects of porosity and how pores form and evolve.
3. Figures 1 and 2. Whether there were changes in the pictures depending on the time and dose of TEM irradiation/ measurements?
4. Table 1 needs analysis of errors and measurement accuracy.
5. page 10. About the formation of the surface NiAl2O4-like spinel phase. What is the porosity and imperfection of such a phase? Note that the last case (pores in MgAl2O4) was studied in detail in: Klym, H.; et al . Positron Annihilation Lifetime Spectroscopy Insight on Free Volume Conversion of Nanostructured MgAl2O4 Ceramics. Nanomaterials 2021, 11, 3373. https://doi.org/10.3390/nano11123373
6. Authors should carefully check the references, in many cases, the titles of the journals are missing and this makes it difficult to analyze the manuscript.
7. 7. In Conclusions, it is necessary to clearly articulate what new data have been obtained.
In principle, this is a rather interesting topic, which, of course, needs to be developed and promoted, the results obtained are interesting and can be recommended for publication after detailed consideration and disclosure of the above-mentioned ambiguities.
Author Response
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Author Response File: Author Response.pdf
