Nickel Oxide Nanoparticles on KIT-6: An Efficient Catalyst in Methane Combustion
Round 1
Reviewer 1 Report
In this manuscript, NiO/KIT-6 catalysts were prepared and used in methane combustion. It needs a major revision before it can be accepted. My comments and suggestions are as follows:
(1) In the introduction, recent advances on NiO/SiO2 catalysts for methane combustion in the literature should be described.
(2) NiO particle size in the NiO/KIT-6 catalyst should be estimated.
(3) XRD results of 10wt.% NiO/SBA–15, 10wt.% NiO/MCF and 10wt.% NiO/SiO2 catalysts, is suggested be added to better explain the difference of the catalyst activity.
(4) The catalytic performance of NiO/KIT-6 should be compared with that of Ni-based catalysts in the literature.
Author Response
Please see the attachment.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
major revision
Nickel oxide nanoparticles on KIT–6: An efficient catalyst in 2 methane combustion
Comment:1. Catalytic activity tests: It would be of great help if the authors show the experimental setup of the reactor used with all the accessories i.e. fixed-bed stainless steel tubular micro-reactor.
Comment:2. Avoid using abbreviation in abstract without their first mention.
Comment:3. The conclusion section is discussed with bullet points
Comment:4. The introduction section should be expanded by citing the literature such as 1-
1- www.mdpi.com/journal/processes ( Highly Selective Syngas/H2 Production via Partial Oxidation of CH4 Using (Ni, Co and Ni–Co)/ZrO2– Al2O3 Catalysts: Influence of Calcination Temperature)
2- https://doi.org/10.1016/j.ijhydene.2018.04.152 ( Rh promoted and ZrO2/Al2O3 supported Ni/Co based Catalysts: High activity for CO2 Reforming, Steam–CO2 Reforming and Oxy–CO2 Reforming of CH4)
3- https://doi.org/10.3390/pr8050499 ( Hydrogen Production by Partial Oxidation Reforming of Methane over Ni Catalysts Supported on High and Low Surface Area Alumina and Zirconia)
4- https://doi.org/10.1016/j.ejpe.2018.05.004
5- https://doi.org/10.1016/j.jscs.2016.05.001
Comment:5. The carbon balance data relating to the catalytic performance measurements should be added
Comment:6. Select the optimum catalyst and do sensitivity studies such as long time on stream reaction.
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Reviewer 3 Report
The paper is suggested for publication after the following major comments:
In overall, the main negative aspect of this research paper was the lack of novelty of the work.
In the section of the results and discussions its makes the reader confused, try to present the characterizations part individual then, the catalytic results.
i recommend you, to make EDX for the samples to determine the actual amount of the metal oxide on the surface in each sample due to the variety of Ni concentration in each catalytic sample.
the reaction conditions that you used in your tests is harsh conditions, and based on the table 1 also you mentioned that you got decrease of surface area for your catalyst, this is maybe due to deposited C on the pores, you need to check this.
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
Authors have addressed my concerns and made corresponding changes. I would recommend acceptance to the revised manuscript.
Reviewer 3 Report
I believe the draft does not need to be further modified, and it can be published in the present form.
