Dynamic and Steady State Evolution of Active Sites in H-ZSM5

Round 1

Reviewer 1 Report

This is a good article by investigating steady and dynamic state of hexane cracking using ZSM-5. The authors try to persuade the not only Bronsted acid, but also Lewis acid site can play a role in C-C bond cleavage. In my opinion, this is a good manuscript deserved to be published. Following are my comments:

 

1.      The Si/Al of ZSM-5 is not mentioned. What is the value? I also suggested the authors to compare two different Si/Al values of ZSM-5 to evidence their clam of Lewis acid influence.

2.      In the catalytic results, one decimal is enough. It is not possible to differentiate the precision by two decimals using GC.

3.      In figures 2, 3, 6, and 7, 95% confidence intervals should be presented to show the reproducibility of your system.

4.      In line 172, the authors stated that coke can be a source of H2. They can prove this by testing coked catalyst using TPD to see if there is H2 generated.

Author Response

Dear Reviewer,

The response is attached in the pdf document. 

Author Response File: Author Response.pdf

Reviewer 2 Report

In my oppinion the manuscript desserves publication with only small improvements:

1. In experimental section the authors mentioned about the temperature of zeolite steaming. I think, that the water content should be given.
2.  The authors used zeolite ZSM-5 steamed. Why such a zeolite was used. Did the authors try with "normal" (non-steamed zeolite)
3. The authors discuss the role of both Bronsted and Lewis acid sites in catalytic proces. Did the authors realize some studies of acidity?

Author Response

Dear Reviewer,

The responses to your comments and suggestions are attached in the pdf document.  

Author Response File: Author Response.pdf