Adsorption of octamethylcyclotetrasiloxane on silica gel for biogas purification

Sigot, Léa; Ducom, Gäelle; Benadda, Belkacem; Labouré, Claire

doi:10.1016/j.fuel.2014.06.058

Cited by 68 publications

(43 citation statements)

References 20 publications

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“…The authors concluded that the activated carbons with high pore volume and low carboxylic and phenolic content may be very promising materials with both high siloxane capacities and good thermal regeneration characteristics. Sigot et al (2014) investigated the D4 adsorbing capacity of three materials: a coconut-based activated carbon (930 m 2 /g BET surface area), a 13X zeolite (700 m 2 /g BET surface area) and a Chameleon R silica gel (690 m 2 /g BET surface area). The silica gel exhibited the highest D4 adsorbing capacity: ∼250 mg/g at room temperature and 0% relative humidity (RH).…”

Section: Siloxanes Removalmentioning

confidence: 99%

Biogas Management: Advanced Utilization for Production of Renewable Energy and Added-value Chemicals

Yentekakis

Goula

2017

Front. Environ. Sci.

103

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Biogas is widely available as a product of anaerobic digestion of urban, industrial, animal and agricultural wastes. Its indigenous local-base production offers the promise of a dispersed renewable energy source that can significantly contribute to regional economic growth. Biogas composition typically consists of 35-75% methane, 25-65% carbon dioxide, 1-5% hydrogen along with minor quantities of water vapor, ammonia, hydrogen sulfide and halides. Current utilization for heating and lighting is inefficient and polluting, and, in the case of poor quality biogas (CH 4 /CO 2 < 1), exacerbated by detrimental venting to the atmosphere. Accordingly, innovative and efficient strategies for improving the management and utilization of biogas for the production of sustainable electrical power or high added-value chemicals are highly desirable. Utilization is the focus of the present review in which the scientific and technological basis underlying alternative routes to the efficient and eco-friendly exploitation of biogas are described and discussed. After concisely reviewing state-of-the-art purification and upgrading methods, in-depth consideration is given to the exploitation of biogas in the renewable energy, liquid fuels, transport and chemicals sectors along with an account of potential impediments to further progress.Keywords: biogas, upgrading, purification, utilization, SOFC, ethylene, reforming, siloxanes BIOGAS Efficient management of ever-increasing amounts of municipal, industrial and agricultural wastes in order to minimize their environmental impact is an urgent necessity. Biological treatment of wastes, which can be carried out either aerobically or anaerobically, is widely applied in this area. Due to their several advantages the anaerobic processes are to be preferred because they require considerably smaller installations, produce less sludge, operate at lower temperatures and are suited to periodic operation. Much more importantly, they generate biogas, which is an attractive potential source of renewable energy and/or added-value chemicals due to its high content of methane and CO 2 . Anaerobic digestion (AD) can proceed over a wide temperature range, from phychrophilic (ca. 10-20 • C) and mesophilic (ca. 20-45 • C) up to thermophilic (ca. 45-65 • C) and hyperthermophilic (ca. ∼70 • C) levels, by means of cooperation between anaerobes and facultative anaerobe microorganisms, which successively promote a sequence of hydrolysis-acidogenesis,

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Section: Siloxanes Removalmentioning

confidence: 99%

Biogas Management: Advanced Utilization for Production of Renewable Energy and Added-value Chemicals

Yentekakis

Goula

2017

Front. Environ. Sci.

103

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“…The most common adsorbents used to remove siloxanes are activated carbons (AC), which have been widely implemented to treat synthetic gas and real landfill/sewage gas due to their excellent adsorption capacities [2,4,6,8,11,69,[94][95][96][99][100][101][102][103][104][105]. Inorganic adsorbents, such as silica gel, zeolites and alumina, and other polymeric adsorbents, such as polyurethane foams, have also been widely employed [4,8,70,[94][95][96]106].…”

Section: Adsorption Processesmentioning

confidence: 99%

“…Most of the lab-scale experiments (both with AC and inorganic materials) are conducted in N 2 dry matrices and at very high siloxanes concentrations (not representing sewage biogas conditions), leading to higher adsorption capacities, which are not later observed in real operation [4,94,[100][101][102]. For example, a relative humidity of 50-70% can reduce the siloxanes adsorption capacity a factor of 10 or greater [4,106], probably as a result of water adsorption and formation of hydrogen bonds with oxygen functional groups on the adsorbent material surface, which block the adsorption sites. Moreover, Hepburn et al [69] showed that bed dimensioning (height-diameter ratio) also plays an important role in the siloxane adsorption capacity, concluding that operation at high Reynolds number favoured siloxane adsorption.…”

Section: Adsorption Processesmentioning

confidence: 99%

Understanding the effects of the origin, occurrence, monitoring, control, fate and removal of siloxanes on the energetic valorization of sewage biogas—A review

Arespacochaga

Valderrama

Raich-Montiu

et al. 2015

Renewable and Sustainable Energy Reviews

101

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“…Moreover, some of the impurities must be removed before the utilization of biogas, to ensure better performance and to prevent the environmental pollution of toxic gas emissions (Liu al., 2015). The removal of CO 2 and H 2 S from biogas via adsorption is a very simple method, with good results, and the simultaneous and competitive separation of impurities to upgrade the quality of biogas and increase CH 4 via the adsorption method have been reported (Sigot et al, 2014;Gil et al, 2015;Bacsik et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Biogas from Palm Oil Mill Effluent: Characterization and Removal of CO2 using Modified Clinoptilolite Zeolites in a Fixed-Bed Column

Kusrini¹,

Lukita

Gozan³

et al. 2016

IJTech

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The main focus of this article was to investigate the potential of natural zeolite adsorbent for the removal of CO 2 and H 2 S in biogas produced from palm oil mill effluent (POME) in fixed-bed column adsorption. The effects of the flowrates and dosage of the adsorbent on the CO 2 adsorption were also studied. The surface area of the adsorbent was determined using the Brunauer, Emmett, and Teller (BET) model, while the pore size distribution was calculated according to the Barrett, Joyner, and Halenda (BJH) model. The morphology of the adsorbent was determined by field emission scanning electron microscopy and energy dispersive x-ray (FESEM-EDX) analysis. Before and after purification, the biogas was analyzed by gas chromatography with a thermal conductivity detector and polydimethylsiloxane as a column. Biogas from the POME, via the anaerobic digestion process, produced 89% CH 4 and 11% CO 2 . The surface and structure of the clinoptilolite zeolites was modified by a strong acid (1M HCl), strong base (1M NaOH), and calcination at 450C, and the surface area of the natural zeolites was reduced up to 16%. The working capability of CO 2 adsorption by the modified zeolites decreased with increasing flow rates (100, 200, and 300 mL/min) of the biogas, with levels of CO 2 at 106,906, 112,237, and 115,256 mg/L. The removal of the CO 2 in the biogas by using adsorbent dosages of 1.5, 2.0, and 2.5 g was 97,878, 97,404 and 93,855 mg/L, respectively. The optimum purification of the biogas occurred under the flow rate of 100 mL/min and adsorbent dosage of 2.5 g. The high working capability of the modified zeolites for the removal of CO 2 in the biogas was a key factor, and the most important characteristic for the adsorbent. The results indicate that clinoptilolite zeolites are promising adsorbent materials for both the purification and upgrading of biogas.

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Adsorption of octamethylcyclotetrasiloxane on silica gel for biogas purification

Cited by 68 publications

References 20 publications

Biogas Management: Advanced Utilization for Production of Renewable Energy and Added-value Chemicals

Biogas Management: Advanced Utilization for Production of Renewable Energy and Added-value Chemicals

Understanding the effects of the origin, occurrence, monitoring, control, fate and removal of siloxanes on the energetic valorization of sewage biogas—A review

Biogas from Palm Oil Mill Effluent: Characterization and Removal of CO2 using Modified Clinoptilolite Zeolites in a Fixed-Bed Column

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