**3. Conclusions**

The editors of this Special Issue are pleased to bring the recent advancements in thermochemical conversion processes for solid fuels and renewable energies to the scientific community. In this Editorial, the majority of published papers (in total four studies) was related to the gasification of low-rank solid fuels (e.g., biomass and lignite), subjected at the early stage of development to a single fluidized bed gasifier and recently to dual fluidized bed gasification systems, such as the sorption enhanced gasification and the chemical looping gasification. Three published papers focused on the evaluation of recent absorption and adsorption technologies for carbon capture. Two published papers were related to the most abundant renewable energy source available "Solar Energy". The solar energy in the first manuscript was used to operate a solar driven-absorption cooling system, while in the second manuscript it was converted into electrical power in an integrated solar combined cycle. The last paper discussed the operational flexibility of a circulating fluidized bed boiler, subjected to a typical operation during fluctuating electricity generation by renewables.

We hope the information collected in this Special Issue, involving new results on thermochemical conversion technologies, will benefit the readers of *Applied Sciences*. All papers were published online, free of cost or access barriers. We also look forward to more submissions to the second volume of this Special Issue "Thermochemical Conversion Processes for Solid Fuels and Renewable Energies: Volume II"—in particular, studies of high-quality, excellence, and clarity that can make a difference in this field of research.

**Author Contributions:** F.A. was responsible for writing, review, and editing this Editorial. J.S. has read and reviewed this Editorial. Both authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** Not applicable.

**Acknowledgments:** The editors would like to thank the Assistant Editor Tamia Qing and her team for the technical support and organizational managemen<sup>t</sup> of this Special Issue. Furthermore, many thanks go to all the reviewers for reviewing the above-referenced manuscripts. Their professional reviews have significantly helped to improve the quality of the submitted papers to this Special Issue.

**Conflicts of Interest:** The author declares no conflict of interest.
