Review Reports

Round 1

Reviewer 1 Report

Before the conduction of the dynamic analysis of this process, the thermodynamic feasiability should be conducted regarding to the reduction reactions by hydrogen.

1 What other fields can the fluid bed technique can be used except for the hydrogen reduction based reactions. 2 Please provide the grade of the iron ores.

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

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Comments for author File: Comments.pdf

Author Response

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Author Response File: Author Response.pdf

Reviewer 3 Report

It is a good paper nicely presented, proposing a mathematical evaluation of hydrogen-based fluidized bed using ultra-fines iron ore.

Some minor revision need to be done. When revise your paper please have in mind the following:
1. In the figure 1, the caption should explain (a) and (b) figure. If there only magnify is different one picture may be removed. 
2. If the figure 5 is not the original work of the authors please insert citation.
3. In the figure 8 the caption -Sensitivity analysis of umf – should be enough. The comment-according to Ergun- may be inserted in Discussion text.
4. In the Reference chapter I strongly recommend to avoid over selfcitation. For example in this paper one of the authors appears for 5 times. Also please check again the citation format.

Author Response

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Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

can be accepted.