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Abstract: Global Models are widely used to study reaction kinetics in low-temperature plasma discharges. The governing conservative equations are simplified into a system of ordinary differential equations in order to provide computationally feasible conditions to study complex chemistries with hundreds of species and thousands of reactions. This paper presents a detailed two-temperature global model for a H₂O-He mixture. The model developed in this work uses a statistical thermodynamics approach to solve the heavy particles energy equation self-consistently together with the electron energy and particles balance equations in order to improve the description of reactive plasma environments. Three analytical test cases are presented to validate and demonstrate the capability of this newly developed functionality embedded in PLASIMO software's global model module. The developed H₂He models are compared with the reported results for a radio-frequency plasma and then with experimental measured electron densities and gas temperature for a microwave induced plasma. In addition, conversion and energy efficiencies of hydrogen and hydrogen peroxide productions are compared with experimental values (only for hydrogen) for a pure H2O microwave induced plasma and with available literature results. This comparison underlines the challenges toward finding an optimal plasma configuration and conditions for production of hydrogen from water. The three analytical test cases for validation of the gas-temperature balance implementation in PLASIMO global model and the detailed developed H₂He model can be used as benchmarks for other global plasma models. The PLASIMO input files for the presented H₂He model are available as supplementary materials (https://stacks.iop.org/PSST/30/075007/mmedia) for any future update, please consult the PLASIMO website, https://plasimo.phys.tue.nl.

Description: You can download the files and data used in this paper. The files gm_H2O_He and gm_H2O_He_afterglow.gum in part_b's subdirectories are the files that are used for the paper. Both archives contain only human-readable text files and unpack to a subdirectory tadayon2021.
Please refer to the README file inclosed in the archives for more information.

Abstract: In this work an extensive chemical model is presented for a CO2 plasma that is relevant for the production of `solar fuels'. It consists of 72 species and 5732 reactions. It is based on species definitions and reaction rate coefficients from previous literature, which have been rigorously reviewed, and is augmented with reaction rate coefficients that are obtained from the application of scaling laws. The input data set, which is suitable for usage with the plasma simulation software PLASIMO has been made available in human-readable electronic form on the publisher's website. The correctness of this implementation of the model has been established by realizing an independent ZDPlasKin - compatible implementation setting up equivalent physical models and verifying that the results agree. Results of these `global models' are presented for a typical case study, a cylindrical DBD plasma reactor with pulsed power input.

Description: You can download the files and data used in this paper. The files CO2_model.gum and CO2_chemistry.gum in the models directory are the files that are used for the paper. You will also find the files CO2_model_v2.gum and CO2_chemistry_v2.gum in the same directory. These contain fixes for mistakes in the application of scaling laws that were kindly brought to our attention by Vladislav Kotov of the Forschungszentrum Jülich GmbH, IEK-4. We recommend to use these v2 files. The old versions are kept for those who wish to reproduce the results from the published paper. Both archives contain only human-readable text files and unpack to a subdirectory koelman2016.
If you wish to use these data with your copy of the PLASIMO plasma modelling toolkit, please unpack the archive relative to the input directory of your PLASIMO installation.