Biogas biodesulfurization in an anoxic biotrickling filter packed with open-pore polyurethane foam

Fernández, Maikel; Ramírez, Martín; Gómez, José Manuel; Cantero, Domingo

doi:10.1016/j.jhazmat.2013.10.046

Cited by 105 publications

(82 citation statements)

References 33 publications

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“…In the literature, there are similar studies for simultaneous removal of hydrogen sulfide and nitrate in single-stage biotrickling filters and bioscrubbers (Baspinar et al 2011;Fernández et al 2014). In these single-stage processes, scrubbing of H 2 S and biodesulfurization take place in the same reactor.…”

Section: Performance Of Ufbr With Scrubbed Sulfidementioning

confidence: 99%

“…Removal of H 2 S can be achieved via physicochemical (Nowicki et al 2014;Shang et al 2013;Üresin et al 2014) and biological (Fernández et al 2014;Montebello et al 2012;Rodriguez et al 2014) processes. Amine absorption, liquid phase oxidation and caustics absorption are the most widely used physicochemical methods (Chen et al 2001).…”

Section: Introductionmentioning

confidence: 99%

“…Hence, the spent scrubbing solutions are classified as hazardous substances (Chen et al 2001). The scrubbed H 2 S can be used as electron donor in an autotrophic denitrification process (Eq.3) (Baspinar et al 2011;Fernández et al 2014;Guerrero and Bevilaqua 2015). In this way, the sulfide in the spent scrubbing liquid is desulfurized while the nitrate and/or nitrite ions in wastewater are denitrified.…”

Section: Introductionmentioning

confidence: 99%

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Biogas desulfurization using autotrophic denitrification process

Bayrakdar

Tilahun

Çallı

2015

Appl Microbiol Biotechnol

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The aim of this study was to evaluate the performance of an autotrophic denitrification process for desulfurization of biogas produced from a chicken manure digester. A laboratory scale upflow fixed bed reactor (UFBR) was operated for 105 days and fed with sodium sulfide or H2S scrubbed from the biogas and nitrate as electron donor and acceptor, respectively. The S/N ratio (2.5 mol/mol) of the feed solution was kept constant throughout the study. When the UFBR was fed with sodium sulfide solution with an influent pH of 7.7, about 95 % sulfide and 90 % nitrate removal efficiencies were achieved. However, the inlet of the UFBR was clogged several times due to the accumulation of biologically produced elemental sulfur particles and the clogging resulted in operational problems. When the UFBR was fed with the H2S absorbed from the biogas and operated with an influent pH of 8-9, around 98 % sulfide and 97 % nitrate removal efficiencies were obtained. In this way, above 95 % of the H2S in the biogas was removed as elemental sulfur and the reactor effluent was reused as scrubbing liquid without any clogging problem.

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Section: Performance Of Ufbr With Scrubbed Sulfidementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biogas desulfurization using autotrophic denitrification process

Bayrakdar

Tilahun

Çallı

2015

Appl Microbiol Biotechnol

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“…Such side reactions can lead to a decrease in the octane number of gasoline (Nie et al 2006;Wang et al 2007). Therefore, from both environmental and economic considerations, various alternative deep desulfurization processes have been extensively developed in the past few years, including adsorptive and complexation desulfurization (Mansouri et al 2014;Sevignon et al 2005;Shi et al 2015), biodesulfurization (Boshagh et al 2014;Fernandez et al 2014), extractive desulfurization (Mokhtar et al 2014;Domanska et al 2014;Krolikowski et al 2013), and oxidative desulfurization (ODS) followed by extraction (Zhang et al 2013;Ma et al 2014). …”

Section: Introductionmentioning

confidence: 99%

Efficient desulfurization of gasoline fuel using ionic liquid extraction as a complementary process to adsorptive desulfurization

Nejad

Beigi

2015

Pet. Sci.

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The extractive desulfurization of a model gasoline containing several alkyl thiols and aromatic thiophenic compounds was investigated using two imidazolium-based ionic liquids (ILs), 1-butyl-3-methylimidazolium tetrachloroaluminate, and 1-octyl-3-methylimidazolium tetrafluoroborate, as extractants. A fractional factorial design of experiments was employed to evaluate the effects and possible interactions of several process variables. Analysis of variance tests indicated that the number of extraction steps and the IL/gasoline volume ratio were of statistically highly significant, but none of the interactions were significant. The results showed that the desulfurization efficiency of the model gasoline by the ILs could reach 95.2 % under the optimal conditions. The optimized conditions were applied to study the extraction of thiophenic compounds in model gasoline and several real gasoline samples; the following order was observed in their separation: benzothiophene [ thiophene [ 3-methylthiophene [ 2-methylthiophene, with 96.1 % removal efficiency for benzothiophene. The IL extraction was successfully applied as a complementary process to the adsorptive desulfurization with activated Raney nickel and acetonitrile solvent. The results indicated that the adsorptive process combined with IL extraction could provide high efficiency and selectivity, which can be regarded as a promising energy efficient desulfurization strategy for production of low-sulfur gasoline.

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“…Chemical scrubbers present drawbacks related to outlet sulfur concentration higher than fuel cell tolerance limits and system complexity [11,12]. Biological systems have many disadvantages, because they require a continuous control of the bacteria growth, an accurate conservation of pH values and moisture content [13,14]. Also membrane technologies present the difficulty to obtain high removal capacities in a single treatment cycle and they often have to be coupled with other desulfurization methods [15].…”

Section: Introductionmentioning

confidence: 99%