Sorptive H 2 S removal by impregnated activated carbons for the production of SNG

Köchermann, Jakob; Schneider, Jens; Matthischke, Steffi; Rönsch, Stefan

doi:10.1016/j.fuproc.2015.05.004

Cited by 38 publications

(18 citation statements)

References 17 publications

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“…In order to validate the conclusions drawn above, the rates proposed for 18 % and 50 % nickel catalysts were compared with own basic measurements (cf. 37). An electrically heated fixed‐bed reactor with an internal diameter of 13 mm and a length of 184 mm was used.…”

Section: Rate Analysis Selection and Adaptionmentioning

confidence: 99%

Global Reaction Kinetics of CO and CO₂ Methanation for Dynamic Process Modeling

et al. 2016

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For the design and optimization of methfanation processes detailed modeling and simulation work is advisable. However, only a few kinetics published in literature rely on wide temperature and pressure ranges, which are prevalent at modern methanation applications with dynamic operation. Especially the simulation‐based design of methanation processes with commercial catalysts is difficult due to legal restrictions regarding the publication of kinetic data of those catalysts. In this work, rate equations for the dynamic modeling and simulation of methanation processes operating with commercial Ni/Al2O3 catalysts are selected, adapted, and tested in a dynamic reactor model. The results suggest that the catalyst's nickel content is an indicator for the choice of a rate equation. Testing of the equations in a reactor model meets published data for CO and CO2 methanation and own measurements.

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Section: Rate Analysis Selection and Adaptionmentioning

confidence: 99%

Global Reaction Kinetics of CO and CO₂ Methanation for Dynamic Process Modeling

et al. 2016

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“…Usually, the conditions of char's production are adjusted in order to obtain materials with suitable properties [27]. Special modifications using chemicals, such as caustic impregnations or activation [28][29][30] and metal impregnation [21,22,[31][32][33][34] are carried out to enhance the activated carbon efficiency. However, these processes have high environmental footprint (use and management of chemicals), increase the cost of the materials and jeopardize their regeneration (low temperature of self-ignition) [35].…”

Section: Introductionmentioning

confidence: 99%

H2S removal from syngas using wastes pyrolysis chars

Hervy

Minh

Gérente

et al. 2018

Chemical Engineering Journal

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A B S T R A C TPyrolysis chars from wastes were investigated as sorbents for H 2 S removal from syngas. The H 2 S removal tests were performed at ambient temperature in various dry gas matrices (N 2 , Air, Syngas) to study the effect of the gas composition on the adsorption efficiency. Two chars were produced by the pyrolysis of: used wood pallets (UWP), and a 50/50% mixture of food waste (FW) and coagulation-flocculation sludge (CFS). The chars were functionalized by low-cost processes without chemicals: gas phase oxygenation and steam activation. Activated chars were the most efficient materials due to their large specific surface area, alkaline pH, basic O-containing groups and structural defects in graphene-like sheets. Raman analysis evidenced that inherent mineral species (especially Ca and Fe) increased the H 2 S removal efficiency by promoting the formation of metal sulfide and metal sulphate species at the char surface. Mesopores lower than 70 Å were revealed to be important adsorption sites. Under dry Syngas matrix, the chars remained efficient and selective toward H 2 S removal despite the presence of CO 2 , while O 2 in the Air matrix decreased their removal capacity due to the formation of sulfur acid species. The most efficient material was the steam activated char from FW/CFS, with a removal capacity of 65 mg H2S .g −1 under dry syngas. This char was proved to be completely regenerated with a thermal treatment under N 2 at 750°C. This study demonstrated that activated chars from food waste and sludge could be used as eco-friendly, affordable, and selective materials for syngas desulfurization even under dry atmosphere.

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“… Equipment for the removal of H2S by adsorption (active carbon) (ADSP). This method is one of the most widely used procedures to remove H2S from landfill gas when low concentrations are required (Köchermann et al, 2015). In addition to the physical adsorption, activated carbon significantly improves the H2S removal capacity, as it provides a large catalytic surface for oxidation to elemental sulfur and sulfate (Nam et al, 2018).…”

Section: Decision Hierarchy Structure For Energy Valorization Of Biogasmentioning

confidence: 99%

Collaborative elicitation to select a sustainable biogas desulfurization technique for landfills

Curiel-Esparza

Reyes-Medina²,

Martin-Utrillas

et al. 2019

Journal of Cleaner Production

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The 2015 Paris Agreement within the United Nations Framework Convention on Climate Change establishes three key ways for the reduction of the emissions of Greenhouse Effect Gases: mitigation, adaptation and resilience of ecosystems. In this context, one of the major goals for methane recovery from waste is the process of obtaining biogas from biomass or waste, a form of fuel with zero impact on the carbon footprint of the planet. All possible uses of biogas depend mainly on the degree of purification obtained. The removal of hydrogen sulfide (H2S) is the main weakness in using biogas in industrial applications. If the use of biogas is intended for engines, turbines or to enrich the biogas to obtain natural gas, lowering the levels of H2S will be necessary, in order to avoid corrosion in gas lines and in engines. Biogas desulfurization can be achieved through different techniques: physical, chemical, biological or hybrid procedures. Selecting the most sustainable technique to clean biogas entails a complex problem, which involves the analysis of these desulfurization treatments under different criteria. In this paper, we present a novel collaborative elicitation to select the consensus procedure for the reduction of the concentration of H2S in biogases from landfills. The elicitation technique is based on fuzzy set theory and VIKOR method in order to handle intangible data and to avoid potential bias by the panelists. The proposed hybrid method guarantees traceability and transparency to achieve consensus among the panel of experts during the decision making procedure.

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Sorptive H 2 S removal by impregnated activated carbons for the production of SNG

Cited by 38 publications

References 17 publications

Global Reaction Kinetics of CO and CO₂ Methanation for Dynamic Process Modeling

Global Reaction Kinetics of CO and CO₂ Methanation for Dynamic Process Modeling

H2S removal from syngas using wastes pyrolysis chars

Collaborative elicitation to select a sustainable biogas desulfurization technique for landfills

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Sorptive H 2 S removal by impregnated activated carbons for the production of SNG

Cited by 38 publications

References 17 publications

Global Reaction Kinetics of CO and CO2 Methanation for Dynamic Process Modeling

Global Reaction Kinetics of CO and CO2 Methanation for Dynamic Process Modeling

H2S removal from syngas using wastes pyrolysis chars

Collaborative elicitation to select a sustainable biogas desulfurization technique for landfills

Contact Info

Product

Resources

About

Global Reaction Kinetics of CO and CO₂ Methanation for Dynamic Process Modeling

Global Reaction Kinetics of CO and CO₂ Methanation for Dynamic Process Modeling