Applicability of selected methods and sorbents to simultaneous removal of siloxanes and other impurities from biogas

Gaj, Kazimierz

doi:10.1007/s10098-017-1422-1

Cited by 30 publications

(11 citation statements)

References 25 publications

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“…It is important to mention that long time is required for RP and EP to achieve equilibrium (170 h), which can be due to the low specific surface area (< 2 m 2 /g). Nevertheless, these low-cost materials can reduce the siloxane D4 concentration to values lower than the recommended by leading manufacturers ( < 28 mg/m 3 ) (Gaj, 2017).…”

Section: Adsorption Kineticsmentioning

confidence: 97%

“…In WWTP and landfills, typical concentrations of siloxanes in biogas are between 1-400 mg/Nm 3 (Dewil et al, 2006), where octamethylcyclotetrasiloxane (D4) is the common siloxane compound found (Tran et al, 2019a). Although, there is no legislation to regulate the amount of siloxanes to avoid damages in the combustion systems, some recommendations had been made for limiting the concentration of siloxanes in biogas from 0.3 to 28.0 mg/m 3 (Gaj, 2017).…”

mentioning

confidence: 99%

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Siloxane removal for biogas purification by low cost mineral adsorbent

Pioquinto-García

Rodríguez

Martínez

et al. 2021

Journal of Cleaner Production

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The potential use of raw and expanded perlite as low-cost adsorbents for biogas purification has been investigated. The thermal expansion of perlite causes a reduction in the density of silanol groups from 2515.43 to 653.75 OH/nm 2 ; in contrast, the specific surface area of perlite increased two-fold due to the thermal expansion. To determine the equilibrium adsorption capacity and the adsorption kinetics batch experiments were conducted. The adsorption capacities are in the following order: activated carbon (6.8 mg/g) > silica gel (6.6 mg/g) > expanded perlite (5.81 mg/g) > raw perlite (5.6 mg/g) when compared at the same experimental conditions. The equilibrium adsorption data showed that perlite can be used to reduce the octamethylcyclotetrasiloxane concentration below 28 mg/m 3 , as recommended by leading manufacturers. The adsorption kinetics of octamethylcyclotetrasiloxane onto raw and expanded perlite followed the Linear-Driving Force model suggesting that the mass transfer is the ratecontrolling step. In addition to its low cost, expanded perlite has the advantage of requiring lower desorption temperature (200 ºC) for regeneration in comparison to the reported values for activated carbon (> 400 ºC) and fast desorption kinetics (20 min), which could contribute to a cleaner production of biogas.

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Section: Adsorption Kineticsmentioning

confidence: 97%

mentioning

confidence: 99%

Siloxane removal for biogas purification by low cost mineral adsorbent

Pioquinto-García

Rodríguez

Martínez

et al. 2021

Journal of Cleaner Production

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“…Modern technologies for siloxane removal from biogas are mainly based on physical adsorption using such sorbents as activated carbon, silica gels, zeolites and molecular sieves [19,20]. Above 99 % of siloxane removal efficiency in accessible technologies can be achieved, reducing their concentrations to below 0.1 mg•m -3 [3,17,18].…”

Section: Introductionmentioning

confidence: 99%

Mineral Deposit Formation in Gas Engines During Combustion of Biogas from Landfills and Municipal WWTP

Konkol

Cebula

Bohdziewicz

et al. 2020

Ecological Chemistry and Engineering S

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The biogas produced in municipal wastewater-treatment plants (WWTP) should be cleaned before it can be used as a fuel in internal combustion engines. Efficient running of such engines is possible only subject to using high quality biogas and lubricating oil. Otherwise, biogas impurities in course of complex chemical reactions may form deposits on various engine parts as well as seriously contaminate the lubricating oil. In this paper, mineral deposits containing high concentration of bismuth, silicon, sulphur, calcium and zinc are studied. Silicon deposits demonstrating strong friction properties are formed during combustion of volatile silica compounds. As these deposits build up, abrasion problems, ignition failure and even engine failure result. The bismuth containing deposits comes from bearings degradation, zinc and calcium were derived from the additives present in commercially available lubricating oil, while lead, aluminium, copper, nickel, iron and chromium were introduced by engine wear phenomena. The highest bismuth content was located at the engine cylinder heads and the lowest at the exhaust elements, whereas highest calcium content was registered on the pistons. Silicon containing deposits are highest in the exhaust and lowest at the engine head. Zinc deposits are highest at the piston.

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“…The use of simultaneous intermittent oxygen injection and caustic shock-loading was studied by Lin et al An adsorption method using a natural zeolite mineral (halloysite) was proposed by Gaj (2017) A novel polyacrylic acid based polymer adsorbent exposed to adsorption/regeneration cycles was evaluated as a biogas siloxane adsorbent (Jung et al, 2017). At room temperature (25 °C), the decamethylcyclopentasiloxane adsorption capacity was reported to be 21.55 mg/g adsorbent and the thermal desorption from the exhausted polymer was greater than 95% at 80°C.…”

Section: Physiochemical Odor/emissions Control Methodsmentioning

confidence: 99%

Gaseous Emissions from Wastewater Facilities

Koh¹,

Shaw²

2018

Water Environment Research

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A review of the literature published in 2017 on topics relating to gaseous emissions from wastewater facilities is presented. This review is divided into the following sections: odorant emissions from wastewater treatment plants (WWTPs); greenhouse gas (GHG) emissions from WWTPs; gaseous emissions from wastewater collection systems; physiochemical odor/emissions control methods; biological odor/emissions control methods; odor/GHG characterization/monitoring/ modeling; and odor impacts/risk assessments.

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Applicability of selected methods and sorbents to simultaneous removal of siloxanes and other impurities from biogas

Cited by 30 publications

References 25 publications

Siloxane removal for biogas purification by low cost mineral adsorbent

Siloxane removal for biogas purification by low cost mineral adsorbent

Mineral Deposit Formation in Gas Engines During Combustion of Biogas from Landfills and Municipal WWTP

Gaseous Emissions from Wastewater Facilities

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