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三个审稿人,一个直接拒掉,两个要大修,各位看看还有戏没? 已有13人参与
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审稿意见:reject&resubmit Thank you for your submission to Green Chemistry. Please find the reviewers’ reports on your manuscript copied below. The reviewers feel that the paper is unsuitable for publication in its present form, and that substantial revisions are necessary before the paper could be reconsidered for publication. We therefore feel unable to proceed with publication at this stage. However, we would like to encourage you to fully address the concerns of all the reviewers, in particular the concerns of referee 3 regarding the suitability for Green Chemistry, and resubmit an appropriately revised manuscript to Green Chemistry. Please note that resubmitting your manuscript does not guarantee eventual acceptance, and that your resubmission will be subject to further peer review before a decision is reached. I look forward to a resubmission. Yours sincerely, Helen Reviewer(s)' Comments to Author: Referee: 1 Comments to the Author Recommendation: This paper cannot be accepted for publication in Green Chemistry because there is it does not provide new physical insights. Comments: The manuscript of authors, reports a complete work in which the preparation and characterization of catalyst samples, and a catalytic reaction, transesterification for biodiesel production, are presented. Among the catalyst properties investigated, the basicity of the surfaces, studied by CO2 probe and by a model reaction, represents the most important part of the manuscript. This is a right choice as the Zn-Al hydrotalcites are basic materials and their catalytic activity is in relation with their basicity. Unfortunately, there is not a sufficient original approach for the publication of this manuscript in Green Chemistry, nor concerning the studied materials neither concerning the methodological approach and the reaction. The present manuscript is a good systematic work which merits to be published in another type of scientific journal. In my opinion, it would be better to select the most basic catalyst and to deepen the study of its catalytic performances giving also quantitative kinetic evaluations of the reaction. Details: Strong basic surfaces can be easily covered by adsorbed carbonate species when exposed to air. For comparative purposes, have been the catalysts studied both without and with thermal treatment, made with the final aim of cleaning the surfaces ? It was possible to observe some differences in the obtained catalytic results on the carbonated surfaces and on the carbonate-free surfaces? Nothing has been written about the carbon balance during the transesterification reaction. The amounts of basic sites of the different catalyst samples have to be expressed in micromol per unit surface (micromol/m2) instead of micromol per unit mass (micromol/g) (see Table 4). I cannot find Table 4 cited in the text. Referee: 2 Comments to the Author The authors present an interesting, well-examined study on stable heterogeneous catalysts for transesterification of soybean oil to biodiesel. The Zn-Al containing compounds are characterized in detail, the conclusions are comprehensible. Concerning the application of the catalyst, the long on-stream time is remarkable and should give reason to further investigations in regard to a scale-up. The basis of the integration of IR band areas is not clearly explained (e.g. Table 5). For a comparison of inorganic materials with different BET surfaces the band areas denoted to adsorbed species should be related to the same BET surface, that means a division of IR band areas by BET surface. Probably it was done but it should be explained better. Page 7, line 32-88: This paragraph is a little bit confusing. Please discuss the amount and type (bridging or terminal) of methoxy species in both dehydrated Zn-Al hydrotalcies and Zn-Al oxides abridged and more clearly. Page 1, line 46: the number 3 has to be written with subscripted character in the formula of nitrate A problem is the quality of English usage. There are so many mistakes that it is not possible to correct them all. A general revision is necessary, if possible, by a native speaker. Referee: 3 - adjudicator Comments to the Author This manuscript reports the characterization of zinc-aluminum hydrotalcites and subsequent transesterification. The catalysis seems anecdotal based on the amount of time spent on the application compared to the characterization. This is unfortunate as it could be a highlight. The catalysis should be expanded before the manuscript can be accepted. On the characterization, the N2 sorption needs work. Show the isotherms and discuss the data in terms of the isotherms. What do the isotherms look like? Does the hysteresis suggest slit-like mesopores, or some other shapes? (see paper by Kruk and Jaroneic for more information on characterization) The sorption data seems to contradict the methanol data where reactivity is discussed in terms of surface area (1st paragraph on p5). Why can't methanol access surface hydroxyls in a 6 nm mesopore? Other issues: 1) Perform ammonia-TPD to assess the surface acidity and compare to the CO2-TPD for a better understanding of the surface chemistry. 2) Consider what tables and figures are most important and move others to Supplementary Information. Some of the schemes, figures, and tables are not that important, especially when duplicated as Scheme 1 and Table 2 appear to be. 3) Why was 2 hrs chosen for the calcination time? What happens if the time is varied? 4) What was the atmosphere for the thermal analysis? Air and nitrogen would produce different results that will result in different interpretations. Please elaborate. 5) List the column type (C18, wax, etc) with the model. Also consider using an internal standard such as trimethylbenzene to quantify the GC results. 6) Draw the mechanism to assist the discussion - here is an important picture, more important than Scheme 1 in my opinion. 7) For the methanol IR, why not do MeOH-temperature programmed reaction (TPR), as described by Israel Wachs and Alexis Bell, and look for formaldehyde as a product. Wachs makes the argument for your technique, although slightly different as he focuses on the catalysis. Utilize this and make the characterization stronger by showing the interaction with the produce. With a stronger MeOH section, the transesterification section can be short. Overall, this work is more suited for a catalysis journal; however, after significant revisions, it could be reconsidered for Green Chemistry. ------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------- 还不如直接拒掉,我再投别的杂志!唉! 不知道各位虫友有没有遇到这种情况,都是怎么处理的? [ Last edited by 仗剑落花 on 2013-10-23 at 08:44 ] |
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