Advances and Challenges in Zeolite-Based Catalysts for the Selective Catalytic Oxidation of Ammonia

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

This review paper provides a comprehensive and timely overview of the developments in NH₃-SCO catalysis using zeolite-based materials. The authors have effectively highlighted the fundamental aspects, recent advancements, and challenges in the field, making the work highly relevant to the catalysis community. The manuscript is well-organized, with clear insights into key concepts such as reaction mechanisms, catalyst design, and practical applications. However, there are a few areas that require clarification and minor improvement before publication:

1. The manuscript sometimes uses "NOₓ" and "NOx" interchangeably. For clarity, please ensure consistent use of terminology throughout the text.

2. Including Figure 1 provides valuable visual support for the discussion. However, the captions could be expanded to explain the key takeaways for readers who may not be familiar with the subject matter. For example, the advantages of metal species and the zeolite framework could be explicitly summarized in the caption.

3. While the authors have presented various mechanistic pathways (e.g., imide, hydrazine, and i-SCR mechanisms), the discussion on temperature-dependent shifts between these pathways could benefit from a more detailed explanation, supported by quantitative data or specific references to experimental findings.

 

4. The manuscript is generally well-written; however, a final proofreading step is recommended to eliminate minor typographical errors and improve sentence fluency. 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

1.      Line 40: At the early start of the introduction, kindly add a small paragraph on the importance of Ammonia production and kindly refer to the following related recent source:

Amhamed, A.I.; Shuibul Qarnain, S.; Hewlett, S.; Sodiq, A.; Abdellatif, Y.; Isaifan, R.J.; Alrebei, O.F. Ammonia Production Plants—A Review. Fuels 2022, 3, 408-435. https://doi.org/10.3390/fuels3030026

2.      Kindly fix the reference styles. Some have no space between them and the last word in the sentence, some have the wrong style, such as reference 9 (line 72), and so on.

3.      Line 95-106: kindly list the equations outside the text and give them numbers, also cite the sources for this part

4.      Line 98: replace (the) with (an)

5.      Line 107: it should be (because of its), not because its

6.      Line 131: add proper references, please

7.      Line 137: add proper references, please

8.      Line 151: add proper references, please

9.      Line 156: add proper references, please

10.  Line 163: add proper references, please

11.  If Figure 1 is your own, kindly indicate in the caption (Source: The Authors). Kindly do the same with the rest of figures by clearly indicating the sources.

12.  Line 172: add proper references, please

13.  Line 173: add proper references, please

14.  Line 196-204: add proper references, please

15.  Line 218-227: add proper references, please

16.  Line 228-233: add proper references, please

17.  Line 274-278: add proper references, please

18.  Line 283: you mentioned that “Góra-Marek et al. [30] reported”, however, reference 30 is not for those authors! Hence, the whole paragraph should be checked and revised.

19.  Line 287-292: add proper references, please

20.  Line 431-439: add proper references, please

21.  Line 440-443: add proper references, please

 

22.  Elaborate on 3D printing techniques and add related references

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

Comments and Suggestions for Authors

Thanks