Purification of landfill biogases from siloxanes by adsorption: A study of silica and 13X zeolite adsorbents on hexamethylcyclotrisiloxane separation

Montanari, Tania; Finocchio, Elisabetta; Bozzano, Irene; Garuti, Gilberto; Giordano, Andrea; Pistarino, C.; Busca, Guido

doi:10.1016/j.cej.2010.10.032

Cited by 51 publications

(29 citation statements)

References 15 publications

(27 reference statements)

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“…It is in accordance with results from Montanari et al [17]: after adsorption of D3 on SG, they revealed that desorption up to 200°C by purging with nitrogen as well as by vacuum treatment was incomplete. On the contrary, Schweigkofler and Niessner [11] observed excellent desorption efficiency (greater than 95%) of SG loaded with 10 mg/g siloxane (L2 or D5) by thermal desorption (250°C for 20 min) with gas circulation.…”

Section: Adsorption Of D4 After Regeneration By Heatingsupporting

confidence: 91%

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Adsorption of octamethylcyclotetrasiloxane on silica gel for biogas purification

Sigot

Ducom

Benadda

et al. 2014

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Section: Adsorption Of D4 After Regeneration By Heatingsupporting

confidence: 91%

“…One major way to remove VOSiCs is adsorption [12][13][14][15][16][17][18][19][20][21][22]. In this paper, dynamic laboratory-scale experiments were conducted on a synthetic polluted gas stream to compare three adsorbents for the removal of octamethylcyclotetrasiloxane (D4): an activated carbon (AC), a zeolite (Z) and a silica gel (SG).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of octamethylcyclotetrasiloxane on silica gel for biogas purification

Sigot

Ducom

Benadda

et al. 2014

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“…Accordingly, materials that exhibit quasi-linear CO 2 adsorption isotherms at low pressures, as opposed to very steep ones that rapidly flatten above a certain pressure, are far preferable in PSA applications, even if the latter offer much higher ultimate capacities (Grande, 2012). Materials which meet the requirements for effective, low-cost CH 4 -CO 2 separation are zeolites, carbon molecular sieves and activated carbons (Pandey and Fabian, 1989;Cebula, 2009;Montanari et al, 2010;Ryckebosch et al, 2011;Alonso-Vicario et al, 2010).…”

Section: Adsorption Processesmentioning

confidence: 99%

“…Adsoprtion-based removal of CO 2 from biogas is widely practiced and commercially applied at both pilot and demonstration plant levels and is still an active research subject (Cavenati et al, 2008;Cebula, 2009;Petersson and Wellinger, 2009;Alonso-Vicario et al, 2010;Tippayawong and Thanompongchart, 2010;Grande, 2011;Montanari et al, 2010;Grande, 2012;Ryckebosch et al, 2011;Yuan et al, 2013;Andriani et al, 2014). The techniques used include PSA and TSA, both involving two packed-bed columns in a swing-type arrangement employing appropriate valve sequencing, as shown schematically in Figure 2.…”

Section: Adsorption Processesmentioning

confidence: 99%

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

Yentekakis

Goula

2017

Front. Environ. Sci.

102

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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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Dimethylsilanone Generation from Pyrolysis of Polysiloxanes Filled with Nanosized Silica and Ceria/Silica

et al. 2016

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Temperature‐programmed desorption mass spectrometry (TPD MS) was used to study the pyrolysis of PDMS and its composites with nanosized silica and ceria/silica. The results suggest that the elusive organosilicon compound, dimethylsilanone, is generated from PDMS over a broad temperature range (in some cases starting at 70 °C). The presence of nano‐oxides catalyzes this process. Ions characteristic of the fragmentation of dimethylsilanone under electron ionization are assigned with the aid of DFT structure calculations. Possible reaction mechanisms for dimethylsilanone generation are discussed in the context of the calculated kinetic parameters. Observed accompanying products of PDMS pyrolysis, such as tetramethylcyclodisiloxane and hexamethylcyclotrisiloxane, indicate that multiple channels are involved in the dimethylsilanone release.

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Purification of landfill biogases from siloxanes by adsorption: A study of silica and 13X zeolite adsorbents on hexamethylcyclotrisiloxane separation

Cited by 51 publications

References 15 publications

Adsorption of octamethylcyclotetrasiloxane on silica gel for biogas purification

Adsorption of octamethylcyclotetrasiloxane on silica gel for biogas purification

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

Dimethylsilanone Generation from Pyrolysis of Polysiloxanes Filled with Nanosized Silica and Ceria/Silica

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