DOI: 10.5061/dryad.sf7m0cgbc
title: Hydrothermal carbonization of vegetable-tanned leather shavings (HTC-VTS) for environmental remediation: optimization of process conditions

description: Herein, the response surface methodology (RSM) has been used to study
 simultaneously the effects of carbonization temperature, residence time,
 and moisture content on the activated hydrochar preparation-based
 vegetable-tanned leather shavings (VTS) using hydrothermal carbonization
 method (HTC). Owing to the desirability chosen, three responses were
 analysed, namely: the hydrochar yield, iodine, and methylene blue numbers.
 The analysis of experimental results revealed that the hydrochar yield was
 decreased with an increase in carbonization temperature which led to
 micropores formation inside the hydrochar network. The optimal preparation
 conditions retained were: 83.10%, 390.44 mg/g, and 259.63 mg/g for the
 hydrochar yield, iodine, and methylene blue number respectively. The
 hydrochar micrograph showed the presence of external pores, whereas the
 FTIR analysis recorded the presence of acidic functional groups found on
 hydrochar surface. The findings revealed that the VTS is a good precursor
 for the hydrochar preparation useful in the removal of organic and
 inorganic pollutants in aqueous media. 
description: FTIR Analysis, SEM (Scanning Electron Microscopy), BET
 (Brunauer-Emmett-Teller)_VTS_HTC (Vegetal Tanned Shaved-Hydrothermal
 Carbonization), and TGA (Thermogravimetric analysis)
description: # Title: Hydrothermal carbonization of vegetable-tanned leather shavings
 (HTC-VTS) for environmental remediation: optimization of process
 conditions The data uploaded can be used to reproduce the experiments.
 These include SEM, IR, DTA and TGA using programs like origin and excel. *
 The Brunauer-Emmett-Teller (BET) data are obtained by
 adsorption-desorption of nitrogen (N2) on to activated hydrochar obtained
 at optimal conditions, using TriStar 3000 V6.05 A apparatus. This device
 measures the Relative pressure (P/P0) vs Quantity Adsorbed (cm/g STP)
 which is used to determine the surface area, pore structure (pores
 distribution, volume and size of pores) as reported in the file named
 `BET\_VTS\_HTC\`. * Thermogravimetric analysis (TGA) is used to determine
 the loss of mass with increasing temperature and DTA (Differential Thermal
 analysis) is used to determine the transformation of material compared to
 an inert matter choose as reference. The data provided herein measures the
 temperature against the mass of the sample. More precisely, the different
 files `TGA 5C\_min`, `TGA 10C\_min`, `TGA 15C\_min`, `TGA 20C\_min` and
 `TGA 50C\_min` are respectively the rate of increase temperature for the
 TGA of prepared activated Hydrochar. * Infrared (IR) spectroscopy gives
 the absorbance of light against frequency measures in the IR domain of the
 electromagnetic spectrum. This method is useful to get the functional
 groups find in the sample. These IR data are obtained from VTS-HTC
 (Vegetal Tanned Shaved-Hydrothermal Carbonization) of samples at optimal
 conditions and are located in Zenodo. * The SEM (Scanning Electron
 Microscopy) images of the hydrochar prepared through hydrothermal
 carbonization (HTC) at different resolutions as well as EDX that provides
 elementary analysis of samples are presented in the SEM -
 VTS-HTC-DATA-Report file. For that purpose, the file named SEM -
 VTS-HTC-DATA-Report presents images of the materials taken at different
 resolutions and are located in Zenodo.