{"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":"81ecd214-32c7-42f2-8f9d-545a57051e9c","name":"determining-chemical-reaction-systems-plasma-assisted-conversion-methane-using-genetic","title":"Determining Chemical Reaction Systems in Plasma-Assisted Conversion of Methane Using Genetic Algorithms","author":"Achim von Keudell","author_email":"d.reiser@fz-juelich.de","maintainer":"Research Data Repository","maintainer_email":"achim.vonkeudell@rub.de","license_title":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/","notes":"\u003Cp\u003EEven for processes with only a few gas species involved the detailed description of plasma-assisted conversion processes in gas mixtures requires a large amount of processes to be taken into account and a large number of neutral and charged particles must be considered. In addition, setting up the corresponding reaction kinetics model needs the knowledge of the rate coefficients and their temperature dependence for all possible reactions between those species. Reduced reaction networks offer a simplified and pragmatic way to obtain an overall reaction kinetics model, already useful for the analysis of experimental data even if not all details of chemistry can be covered. In this paper we present a derivation of a data driven reduced model for plasma-assisted conversion of methane in an helium environment. By consideration of a small number of elementary reactions, a simple model is set up. Experimental data are analyzed by a genetic algorithm that provides best-fit approximations for the open parameters of the model. In a further step non-relevant parameters of the model are identified and a further model reduction is achieved. The data driven analysis of methane conversion serves as an illustrative example of the proposed method. The parameters and reaction channels found are compared with known results from the literature. The method is described in detail. The main goal of this work is to present the potential of this data driven method for a simplified and pragmatic modeling in the increasingly important field of plasma-assisted catalytic processes.\u003C\/p\u003E\n","url":"https:\/\/rdpcidat.rub.de\/dataset\/determining-chemical-reaction-systems-plasma-assisted-conversion-methane-using-genetic","state":"Active","log_message":"Edited by kd.","private":true,"revision_timestamp":"Sun, 03\/21\/2021 - 16:29","metadata_created":"Thu, 03\/18\/2021 - 17:25","metadata_modified":"Sun, 03\/21\/2021 - 16:29","creator_user_id":"97d4ca9e-d6a4-435e-b2fa-290a5ce8358c","type":"Dataset","resources":[{"id":"d8bf3c33-990b-4610-8bb3-c66de020f059","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/experimental.txt","description":"\u003Cp\u003EThe data contains the basic information on 269 data points from the experiments on CH4\/O2 conversion\u003Cbr \/\u003E\nfrom T. Urbanietz et al. PCPP \u003Ca href=\u0022https:\/\/link.springer.com\/article\/10.1007\/s11090-020-10151-6\u0022\u003Ehttps:\/\/link.springer.com\/article\/10.1007\/s11090-020-10151-6\u003C\/a\u003E\u003C\/p\u003E\n\u003Cp\u003EThe first line gives some information on the numbers of each row.\u003Cbr \/\u003E\nThe second line gives the number data points following (=269).\u003Cbr \/\u003E\nThen 269 lines are following describing each data point.\u003C\/p\u003E\n\u003Cp\u003EMeaning of the numbers in each row:\u003C\/p\u003E\n\u003Cp\u003Eno     = number of the data point\u003Cbr \/\u003E\nidx    = species index (1 = CH4, 2 = O3, 3 = O2, 4 = O, 5 = CO2, 6 = CO, 7 = H2O, 8 = C, 9 = H2, 10 = e = electron)\u003Cbr \/\u003E\nc_exp  = scaled species density in units of [6.00e+22 m^{-3} \/ scale] for time t\u003Cbr \/\u003E\nweight = weighting factor for data analysis ( = 1.0 for usage of raw data)\u003Cbr \/\u003E\nt      = time in units of [3.33e-03 s]\u003Cbr \/\u003E\nscale  = scaling factor for the species density c_exp\u003Cbr \/\u003E\nCH4    = initial density of CH4 in units of [6.00e+22 m^{-3} \/ scale] for time t=0\u003Cbr \/\u003E\nO3     = initial density of O3  in units of [6.00e+22 m^{-3} \/ scale] for time t=0\u003Cbr \/\u003E\nO2     = initial density of O2  in units of [6.00e+22 m^{-3} \/ scale] for time t=0\u003Cbr \/\u003E\nO      = initial density of O   in units of [6.00e+22 m^{-3} \/ scale] for time t=0\u003Cbr \/\u003E\nCO2    = initial density of CO2 in units of [6.00e+22 m^{-3} \/ scale] for time t=0\u003Cbr \/\u003E\nCO     = initial density of CO  in units of [6.00e+22 m^{-3} \/ scale] for time t=0\u003Cbr \/\u003E\nH2O    = initial density of H2O in units of [6.00e+22 m^{-3} \/ scale] for time t=0\u003Cbr \/\u003E\nC      = initial density of C   in units of [6.00e+22 m^{-3} \/ scale] for time t=0\u003Cbr \/\u003E\nH2     = initial density of H2  in units of [6.00e+22 m^{-3} \/ scale] for time t=0\u003Cbr \/\u003E\ne      = initial density of e   in units of [6.00e+22 m^{-3} \/ scale] for time t=0\u003C\/p\u003E\n","format":"data","state":"Active","revision_timestamp":"Sun, 03\/21\/2021 - 14:54","name":"Species densities of CH4, CO2, CO, H2O vs. position, power, feed gas composition","mimetype":"text\/plain","size":"44.31 KB","created":"Thu, 03\/18\/2021 - 17:26","resource_group_id":"ec8154f9-454d-4b85-895c-f5e010310847","last_modified":"Date changed  Sun, 03\/21\/2021 - 14:54"}],"tags":[{"id":"0f078602-51d5-44a4-9b01-65eb062936b0","vocabulary_id":"2","name":"methane oxidation"},{"id":"1f562f98-3f18-417f-b324-a4eb5340222b","vocabulary_id":"2","name":"genetic algorithm"}],"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"},{"description":"\u003Cp\u003EIEK-4 at FZ J\u00fclich\u003C\/p\u003E\n","id":"4f6ea80a-e0cc-41e5-8d69-aa7f45432260","image_display_url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/fzj.jpg","title":"IEK-4","name":"group\/iek-4"}]}]}