Time changeability model of the bog ore sorption ability

Gaj, Kazimierz; Cybulska-Szulc, Hanna

doi:10.2478/eces-2014-0010

Cited by 3 publications

(3 citation statements)

References 27 publications

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“…(a) bog iron ore (porous sedimentary rock). up to 90% [6,9,14,15,37] Membrane (porous or diffusive) -chemical potential of solutions or mixtures. up to 99% [15,38] Absorption (wet) -caustic soda solution; -aqueous alkanolamine solutions; -ferrous chloride solution.…”

Section: Aspects Of Biogas Desulphurization In the Technical Technolo...mentioning

confidence: 99%

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Raw Biogas Desulphurization Using the Adsorption-Absorption Technique for a Pilot Production of Agricultural Biogas from Pig Slurry in Poland

et al. 2021

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The article reviews selected methods and techniques of agricultural biogas desulphurization. Presented is the current state of technological and measurement systems as well as raw biogas purification methods in terms of control and measurement-socio-economic aspects were also pointed out. On the example of a pilot agricultural biogas with the use of pig slurry, the required technical and technological criteria for the production and processing of agricultural biogas were indicated. The article presents the preliminary results of experimental studies on the course of changes in the volumetric composition of biogas on the basis of the average daily production of agricultural biogas. The amount of H2S in raw and purified biogas was analyzed with the proprietary biogas desulphurization method in terms of the process parameters. A novelty is the use of a developed carbon mixture (activated carbon) with turf ore (iron compounds), which allows for 100% desulfurization of raw agricultural biogas under process conditions for mesophilic fermentation. The measurement results show a clear influence of desulphurization using the proprietary adsorption-absorption technique-agricultural biogas.

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Section: Aspects Of Biogas Desulphurization In the Technical Technolo...mentioning

confidence: 99%

“…Of particular importance is the methane (CH 4 ) content of biogas, which determines the calorific value of this fuel. A significant parameter is also the H 2 S concentration, which is a pollutant of biogas and hinders its utilisation [3][4][5][6][7][8][9][10][11][12][13][14][15][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Raw Biogas Desulphurization Using the Adsorption-Absorption Technique for a Pilot Production of Agricultural Biogas from Pig Slurry in Poland

et al. 2021

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“…The composition of bog iron ores combined with their porous structure results in complex surface chemistry and large specific surface areas. Therefore, these mineral raw materials have been used as sorbents for removing hydrogen sulfide and hydrogen cyanide from flue gases and biogas [41][42][43][44][45] and have also been recently investigated as heavy metal sorbents [46,47].…”

Section: Introductionmentioning

confidence: 99%

Mineral transformations and textural evolution during roasting of bog iron ores

Rzepa

Bajda

Gaweł

et al. 2015

J Therm Anal Calorim

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The processes occurring during roasting of bog iron ores were characterized using TG-DTG-DTA-QMS, XRD, FTIR and specific surface analysis. Removal of physically adsorbed water is followed by dehydroxylation of iron oxyhydroxides and oxidation of organic matter at 200-600°C. The main product of the transformations is disordered nanocrystalline (proto)hematite or hematite/-maghemite mixture, depending on organic matter content and heating conditions. The conversion of iron oxyhydroxides to hematite occurs at temperatures different than those reported for pure compounds. At higher temperatures, protohematite undergoes recrystallization to the stoichiometric hematite, and manganese oxides are partially reduced. At 1000°C, the roasting products consist of hematite and cristobalite together with Mn-Fe spinels if the initial ore contained Mn oxides. The admixtures of various secondary silicates were encountered as well. Low-to moderate-temperature roasting slightly affects the specific surface area and lowers volume of micropores. The hightemperature transformations lead to decrease in the specific surface area and to the destruction of porous texture of the bog iron ores. Although the general course of the processes during roasting was similar in all the samples, some of their details as well as mineralogy and properties of the products are highly dependent on the composition of the initial material.

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