{"help":"Return the metadata of a dataset (package) and its resources. :param id: the id or name of the dataset :type id: string","success":true,"result":[{"id":"ba74b77f-99fa-4825-aa38-3d34eff9d617","name":"non-equilibrium-excitation-co2-atmospheric-pressure-helium-plasma-jet","title":"Non-equilibrium excitation of CO2 in an atmospheric pressure helium plasma jet","author_email":"Achim.vonKeudell@ruhr-uni-bochum.de","maintainer":"Research Data Repository","maintainer_email":"achim.vonkeudell@rub.de","license_title":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/","notes":"\u003Cp\u003EThe energy ecient excitation of CO2 in atmospheric pressure plasmas\u003Cbr \/\u003E\nmay be a method to generate solar fuels from renewable energies. This energy eciency\u003Cbr \/\u003E\ncan be very high, if only specic states of the molecules in the plasma are populated\u003Cbr \/\u003E\ncreating a strong non-equilibrium. This requires a specic design of the plasma source,\u003Cbr \/\u003E\nmethod of plasma excitation and choice of gases and admixtures. In this paper, nonequilibrium\u003Cbr \/\u003E\nexcitation and dissociation of CO2 in an atmospheric pressure helium RF\u003Cbr \/\u003E\nplasma jet is analysed for varying absorbed plasma power and admixture levels of\u003Cbr \/\u003E\nCO2. The concentrations of CO2 and of CO, as well as the vibrational and rotational\u003Cbr \/\u003E\ntemperatures of the possible degrees of freedom of the molecules are evaluated by\u003Cbr \/\u003E\nFourier transform infrared spectroscopy (FTIR). The molecular rotational vibrational\u003Cbr \/\u003E\nspectra are modelled based on Maxwell-Boltzmann state populations using individual\u003Cbr \/\u003E\ntemperatures for each degree of freedom. A strong non-equilibrium excitation of CO2\u003Cbr \/\u003E\nand CO has been found. Whereas the rotational temperatures are 400 K or below, the\u003Cbr \/\u003E\nvibrational temperature for CO reaches values up to 1600 K and that of the asymmetric\u003Cbr \/\u003E\nvibration of CO2 of 700 K. The dependence of these excitation temperatures on plasma\u003Cbr \/\u003E\npower and admixture level is rather weak. The mass balance, the energy and conversion\u003Cbr \/\u003E\neciency are consistent with a very simple chemistry model that is dominated by CO2\u003Cbr \/\u003E\ndissociation via Penning collisions with helium metastables. A conversion effciency up\u003Cbr \/\u003E\nto 30 % and an energy effciency up to 10 % is observed in the parameter range of the\u003Cbr \/\u003E\nexperiment.\u003C\/p\u003E\n","url":"https:\/\/rdpcidat.rub.de\/dataset\/non-equilibrium-excitation-co2-atmospheric-pressure-helium-plasma-jet","state":"Active","log_message":"Edited by kd.","private":true,"revision_timestamp":"Sat, 03\/20\/2021 - 19:24","metadata_created":"Thu, 09\/03\/2020 - 17:48","metadata_modified":"Sat, 03\/20\/2021 - 19:24","creator_user_id":"97d4ca9e-d6a4-435e-b2fa-290a5ce8358c","type":"Dataset","resources":[{"id":"f8141d41-3a92-4156-a587-8da746d5fad8","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/conversion20sccm.csv","description":"","format":"csv","state":"Active","revision_timestamp":"Thu, 09\/03\/2020 - 17:51","name":"CO2 conversion at 20 sccm admixture","mimetype":"text\/csv","size":"157 bytes","created":"Thu, 09\/03\/2020 - 17:51","resource_group_id":"ec8154f9-454d-4b85-895c-f5e010310847","last_modified":"Date changed  Thu, 09\/03\/2020 - 17:51"}],"tags":[{"id":"b8e4e439-4227-4ff6-bada-fab9caf32896","vocabulary_id":"2","name":"catalysis"}],"groups":[{"description":"\u003Cp\u003EThe group \u0022Experimental Physics II - Reactive Plasmas\u0022 at the faculty of physics and astronomy at Ruhr University Bochum.\u003C\/p\u003E\n","id":"ec8154f9-454d-4b85-895c-f5e010310847","image_display_url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/rublogoweiss_0.png","title":"EP2","name":"group\/ep2"}]}]}