READ ME This text describes the data presented in the paper: Dendritic silver self-assembly in molten-carbonate membranes for efficient carbon dioxide capture ======================== Introductory information ======================== Files included in the data deposit (include a short description of what data are contained): Fig 2 – 4 x SEM images Fig 3 – 9 x wetting images Fig 4 – 1 x permeation experiment Fig 5 – 1 x permeation experiment Fig S4 – 3 x MIP Fig S5 – 2 x TGA Fig S6 – 4 x wetting images Explain the relationship between multiple data sets, if required: All datasets are labelled according to the figures they correspond with in the publication above. A description is given below related to calibration and calculations for permeation experiments. Calibration files have also been uploaded - the names of these correspond to raw data files also uploaded. Key words used to describe the data: carbon capture, ceramics, membrane separation ========================== Methodological information ========================== A brief method description – what the data is, how and why it was collected or created, and how it was processed: Experiments were conducted on membranes made from molten carbonate, alumina and carbon. Membranes were characterised by photography and SEM - images have been uploaded. Permeation experiments were conducted for CO2 and O2 permeation, with calibrations and calculations described in the publication and below. Raw data has been uploaded, as well as calibration files, so using both together with the description below allows transformation from raw data to published figure. Mercury intrusion porosimetry was used to characterise membranes. Data was plotted without processing. TGA was used to characterise membranes. For Figure 4 and Figure 5, the permeate flux data for carbon dioxide for the self-healing membranes were calculated based on mass spectrometry and infrared radiation (IR). The current carbon dioxide data of the mass spectrometer were translated into carbon dioxide concentration data by correlating known carbon dioxide sample concentration values with the equivalent carbon dioxide current based on the following equation: C_(?CO?_2 )= (I_(?CO?_2 )-I_(?CO?_2,background))/CF where CF is the calibration factor expressed as: CF= (I_(?CO?_2 )-I_(?CO?_2,background))/C_(?CO?_2,known sample) The same process was followed for the converting current data to concentration data for the nitrogen gas on the permeate side of the membrane. The calibration curve for each gas, during the rest of the experimental values, was obtained by a three-point calibration of the mass spectrometer and the IR analyser. The permeate volumetric flux (ml min-1 cm-2) for carbon dioxide and nitrogen was then obtained by the following equation: J_(CO_2 )=(f_(CO_2 ) V ?)/A_S where ?CO2 is the volume fraction of carbon dioxide in the permeate-side outlet, V? is the volumetric flow rate on the permeate side set at 50 ml min-1, and As is the active permeate membrane surface area of the drilled channels equal to 0.18 cm2 after correcting for the porosity value of 41.37% for this surface. For the IR data, the flux was calculated in the same way. For both mass spectrometer and IR data, the data point representing flux value, is the average flux of several experimental points of the recorded permeate carbon dioxide. The data points during the last hour of measurements, where the flux variation was below 3%, were used to calculate the average flux. Instruments, hardware and software used: Atlas Power T25 Hydraulic Press Custom-made membrane reactor Custom-made wetting angle apparatus Vaisala CARBOCAP Carbon Dioxide Probe GMP343 ESS Genesys MS Pascal 440 Porosimeter Hitachi TM2020SEM Tescan Vega 3LMU Date(s) of data collection: 09/2015 - 09/2018 Geographic coverage of data: n/a Data validation (how was the data checked, proofed and cleaned): Data was validated by comparison to literature data, mass balance expectations, comparison to reference/standard samples and repetitions and calibration as described. For visual data (SEM), processing is as described in the publication. For permeation data, only binning was used to (in effect) modify the sampling rate following permeation experiments. Overview of secondary data, if used: n/a ========================= Data-specific information ========================= Definitions of names, labels, acronyms or specialist terminology uses for variables, records and their values: All files are named according to the figures they correspond to in the publication, with the calibration file used indicated on file names as well (where appropriate). Explanation of weighting and grossing variables: n/a Outline any missing data: n/a ======= Contact ======= Please contact rdm@ncl.ac.uk for further information