Research Progress in Fuel Oil Production by Catalytic Pyrolysis Technologies of Waste Plastics

Round 1

Reviewer 1 Report

Quite an interesting article.

Correct the tables, put the pyrolysis conditions in the same units: temperature/time. Which means 1:10. Tables 1 and 2.

Author Response

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Reviewer 2 Report

An, Kou and co-authors wrote the article: "Research Progress in Fuel Oil Production by Catalytic Pyrolysis Technologies of Waste Plastics". This area is very relevant, especially with the increase in plastic production in the world and the amount of waste generated from it.

While reading this, I had some questions and comments:

The authors should improve the introduction, especially in the field of thermal cracking (pyrolysis) and catalytic processes:

- Calero (https://doi.org/10.1016/j.ces.2023.118569)

- Qureshi (https://doi.org/10.1016/j.jaap.2020.104804)

- Williams (https://doi.org/10.1016/j.resconrec.2006.12.002)

- Chen (https://doi.org/10.1016/j.cej.2023.147853)

There are also a number of works on the joint cracking/pyrolysis of plastic waste and fuel oil, which can also be expanded by the introduction of this work:

- Sergeyev (10.1016/j.jaap.2024.106422)

- Kasar (https://doi.org/10.1038/s41598-022-15371-8)

2) Figure 2. line 145 the font needs to be enlarged, and for Olefin5 and Olefin6 it is necessary to write with a space.

3) Line 260: "...conditions are 200-400 oC and 15-30 MPa hydrogen pressure, Hydrocracking follows the..." must be replaced with .

4) Need to fix "...liquid product[58]." (line 333) to "liquid product [58]." This must be checked throughout the entire text of the article (line 118, 166, 282, 289,327, etc.)

Author Response

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Reviewer 3 Report

This manuscript addresses the current state of the transformation of plastic wastes  by catalytic pyrolysis, in fuels for combustion engines. This update of these available technologies is currently of great interest, given the magnitude of the problem that exists worldwide related to the accumulation of this type of plastic waste, since it is necessary with the greatest urgency to apply this type of engineering to achieve the elimination of these wastes by transforming them into fuels for combustion engines, operated either by compression or spark. The study is very complete and up-to-date so it can be accepted for publication in its current form. However, it must be highlighted in the final manuscript that, although formally the hydrocarbons obtained by pyrolysis of plastics are of fossil origin, they are considered renewable, for legal purposes, since their application as fuels is actually a reuse, which also has the characteristic of to be used for eliminating waste materials.

The revision carried out in the manuscript is perfectly done, and the update it carries out is very timely, since it is a technology that must be carried out immediately because of the current emergency of the plastic wastes over the world. I have already indicated in me evaluation that only it should emphasize the renewable nature of the fuels obtained. Otherwise it seems perfect for publication. 

Author Response

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Author Response File: Author Response.pdf