Dataset on flue gas composition during combustion in the fluidised bed reactor. Glycerol combustion

The dataset presented in this article is the supplementary data for the research article by Żukowski and Berkowicz (doi:10.1016/j.combustflame.2019.05.024) [1], in which for the first time the inert and catalytic cenospheres were used as the fluidised bed material, giving the possibility to burn liquids inside the fluidised bed without the need for using specialised dosing systems. The instantaneous concentrations of the gaseous products during the combustion of glycerol samples were detected using Fourier Transform Infrared Spectroscopy (FTIR, Gasmet DX-4000). The accurate composition at the outlet of the reactor makes it possible to evaluate and verify new kinetic models of the glycerol combustion in the fluidised bed. It also will be helpful in creating new simplified models. The data presented here is essential for the evaluation of CFD combustion models which have to include accurate kinetic data.


a b s t r a c t
The dataset presented in this article is the supplementary data for the research article by Ż ukowski and Berkowicz (doi:10.1016/j.combustflame.2019.05.024) [1] , in which for the first time the inert and catalytic cenospheres were used as the fluidised bed material, giving the possibility to burn liquids inside the fluidised bed without the need for using specialised dosing systems. The instantaneous concentrations of the gaseous products during the combustion of glycerol samples were detected using Fourier Transform Infrared Spectroscopy (FTIR, Gasmet DX-40 0 0). The accurate composition at the outlet of the reactor makes it possible to evaluate and verify new kinetic models of the glycerol combustion in the fluidised bed. It also will be helpful in creating new simplified models. The data presented here is essential for the evaluation of CFD combustion models which have to include accurate kinetic data.
© 2020 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY license.
( http://creativecommons.org/licenses/by/4.0/ ) Subject  Chemical Engineering; Environmental Engineering  Specific subject area  Combustion processes, Fluidisation in the inert and catalytic bubbling bed  Type of data  Table  How data were acquired  The species and concentrations of the main gaseous products during glycerol  combustion were obtained by using infrared absorption spectroscopy (FT-IR,  DX-40 0 0, Gasmet Technologies). Data format Raw Parameters for data collection A careful selection of the analysed compounds was made, and for each compound, a suitable wavenumber range was chosen to avoid overlapping with the spectra of other components. Selected FTIR wave number ranges are available as supplementary material in the related research article [1] . Description of data collection Combustion of glycerol was carried out in a fluidised bed reactor. Two kinds of beds were used. The inert bed was made of cenospheres. The catalytic bed was built of cenospheres covered with Fe 2 O 3 . The beds were heated to 40 0-90 0 °C and then glycerol samples were dripped from the top of the reactor. Quantitative analyses of flue gas composition were performed by GASMET software. This software makes the deconvolution of the spectra of the gas mixture using the method of the least-squares. Value of the data

Specifications table
• The data provides detail information on the quality and quantity of the gaseous products during the combustion of glycerol in fluidised bed made of inert or catalytic cenospheres. • These data made it possible to develop the new fluidised combustion models.
• The data indicates products which are present in the flue gases at given temperatures. They can be used to check already known models of fluidised bed combustion as well as to facilitate the selection of necessary simplifications and skeletons when creating new models.

Data description
The modelling of combustion processes is the subject of many works. In the face of current climate problems, low-emission fluidised bed combustion should attract more attention. However, modelling the combustion process in a fluidised bed reactor is a complex task [7] . To obtain the correct modelling results, it is necessary to validate the kinetic parameters of the chemical reactions with a description of mass and heat exchange in the reaction environment. To validate a chemical process model with a specific environment, experimental data is required to provide as much information as possible about the composition of chemical products. In the case of a process carried out for a single portion of fuel introduced into the bed, the data on the dynamics of the chemical composition of exhaust gases over time is extremely important and it is showed here. This work present composition of flue gases recorded by the FTIR analyser during the combustion of glycerol in a fluidised bed made of cenospheres. Glycerol is a waste liquid derived from the production of biodiesel [8] . It is estimated that its quantities will increase. There are attempts to model glycerol steam reforming or pyrolysis [9 , 10] because of the possibility of hydrogen production. Burning waste glycerol continuously in a fluidised bed is also a considered waste management option [11] . As there are no papers presenting well-validated glycerol combustion models, it is believed that sharing the composition of the exhaust gases from a real object during the combustion of fuel in a fluidised bed is particularly important for the further development of modelling of combustion processes.
This dataset contains 11 Tables. Table 1 presents process variables describing features of the fluidised bed reactor, bed material, and fluidising air. Tables 2 -6 contain flue gas composition during glycerol combustion in the inert bed. Tables 7 -11 contain flue gas composition during glycerol combustion in the catalytic fluidised bed.

Experimental design, materials and methods
The reactor was created from a quartz tube located on a chrome-nickel perforated plate. The parameters of the reactor and plate are summarised in Table 1 . The table also includes the features of two fluidised bed materials (inert and catalytic cenospheres) that were placed in the reactor. The minimum fluidisation velocities were calculated from the Wen and Yu correlation [12] . Previous studies of fluidisation of cenospheres and Fe 2 O 3 -cenospheres (which were presented in the publication [1] ) have shown that this correlation gives the results consistent with real ones. The beds were fluidised with 30 dm 3 /min of air (@ 25 °C, 1013 hPa) and were electrically heated to 40 0, 50 0, 60 0, 70 0, 80 0 and 900 °C. At each temperature, samples of glycerol were dripped into the bed from a height of about 500 mm where the temperature was ambient. The glycerol Table 2 Composition of flue gases during glycerol combustion in a fluidised bed of cenospheres at 400 °C.

Table 3
Composition of flue gases during glycerol combustion in a fluidised bed of cenospheres at 500 °C.

Table 4
Composition of flue gases during glycerol combustion in a fluidised bed of cenospheres at 600 °C.

Table 5
Composition of flue gases during glycerol combustion in a fluidised bed of cenospheres at 700 °C.

Table 6
Composition of flue gases during glycerol combustion in a fluidised bed of cenospheres at 800 and 900 °C.

Table 7
Composition of flue gases during glycerol combustion in a fluidised bed of Fe 2 O 3 -cenospheres at 400 °C.

Table 8
Composition of flue gases during glycerol combustion in a fluidised bed of Fe 2 O 3 -cenospheres at 500 °C.

Table 9
Composition of flue gases during glycerol combustion in a fluidised bed of Fe 2 O 3 -cenospheres at 600 °C.

Table 10
Composition of flue gases during glycerol combustion in a fluidised bed of Fe 2 O 3 -cenospheres at 700 °C.

Table 11
Composition of flue gases during glycerol combustion in a fluidised bed of Fe 2 O 3 -cenospheres at 800 and 900 °C.
was purchased from the Chempur Company (Poland), and its density was 1.26 g/cm 3 . The mass samples and bed conditions are summarised in Table 2 . No flame was observed on the surface of the bed. The drops fell centrally into the fluidised bed and they sank into it (due to lower density of bed) and after a while, glycerol samples were burnt inside the fluidised bed. There was a flue gas probe about 15 cm above the surface of the bed, so the flue gases were sampled from the place, where the temperature was above 100 °C. The gas path (to analyzers) was maintained at 170-180 °C; so there was no possibility of any compounds condensation. Quantitative analysis of the ingredients was carried out by infrared absorption spectroscopy (FT-IR, DX-40 0 0, Gasmet Technologies). Registered concentrations are shown in Tables 2 -6 and Tables 7 -11 , respectively for inert and catalytic fluidised bed.