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Gao, Yu; Han, Zhitao; Zhai, Guangpeng; Dong, Jingming; Pan, Xinxiang

doi:10.1016/j.eti.2021.102124

Cited by 4 publications

(7 citation statements)

References 42 publications

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“…Finally, the water obtained from filtering all packing material samples was individually analyzed using a pH meter (Jiao et al, 2022;Gao et al, 2022). Figure 2 displays a pH-meter with an accuracy of up to 0.001.…”

Section: Phmentioning

confidence: 99%

“…Hydrogen sulfide, certainly one of the most harmful substances found in raw biogas, can make various challenges for the environment and human health if not removed before the primary gas is utilized for electricity generation (Abd & Othman, 2022). Several techniques are utilized to purify H 2 S from biogas (Gao et al, 2022). Among all, the most environmentally friendly and efficient method for desulfurizing hydrogen sulfide from biogas is the utilization of a pilot-scale biofilter (Khalil et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Experimental Research on the Selected Biofiltration Materials Under Dynamic Conditions

Mohammadi,

Vaiškūnaitė

2024

Science - Future of Lithuania

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Hydrogen sulfide (H2S) is a hazardous chemical compound present in raw biogas and requires removal. Biofiltration offers an eco-friendly solution by utilizing sulfur oxidizing bacteria (SOBs) within a biofilter. This biofilter typically comprises packing material to house SOBs and facilitate desulfurization. To optimize removal efficiency (RE), the physicochemical properties of packing materials (organic/inorganic/synthetic) need evaluation. This study focused on the characteristics of sewage sludge and biochar samples produced via pyrolysis at temperatures of 400 °C, 500 °C, and 600 °C, along with cellular concrete (CLC) waste and polyurethane foam (PUF). Measurements included bulk density, pH, and electrical conductivity, with discussion on their impact on H2S purification from biogas under dynamic conditions. Ultimately, PUF, CLC waste, biochar after 600 °C pyrolysis, and sewage sludge exhibited superior performance in terms of lowest bulk density, optimal pH, and highest electrical conductivity.

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Section: Phmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Research on the Selected Biofiltration Materials Under Dynamic Conditions

Mohammadi,

Vaiškūnaitė

2024

Science - Future of Lithuania

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“…Due to its simple operation, high efficiency, and adaptability, the chemical method of removing H 2 S for industrial use looks promising. In the chemical method, alkanolamine, alkali, and an oxidant are frequently used to absorb H 2 S (Gao et al, 2022). Ionic liquids and other absorbents are expensive; Consequently, it is challenging to implement them in the industry (Gao et al, 2022).…”

Section: Chemical Absorption (Wet Technologies)mentioning

confidence: 99%

“…In addition, during combustion, H 2 S is oxidized into acidic sulfur dioxide (SO 2 ), which can be extremely corrosive to metal surfaces (Ghimire et al, 2021;Nhut et al, 2020). Physically adsorbing dissolved sulfide to the surfaces of additional adsorbents lowers the concentration of dissolved sulfides, which is known as adsorption (Gao et al, 2022). Its simple system, low device requirements, simple operation, mild operating conditions, and absence of wastewater generation are drawing more and more attention (Ma et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Analysis and Evaluation of the Biogas Purification Technologies From H2s

Mohammadi,

Vaiškūnaitė

2023

Science - Future of Lithuania

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H2S concentrations in biogas are limited by environmental regulations. Because these gases are toxic to human health, cause corrosion, and damage the combined heat and power (CHP) engines and other metallic parts after burning. Hence, the following requirements must be met by a biogas purification method: 1 – high H2S removal efficiency (RE), 2 – stability over a long period of time, 3 – low cost, 4 – minimal biogas dilution, and 5 – straightforward structure. There are various physical, chemical, and biological technologies, which can be undertaken to meet earlier mentioned criteria and efficiently remove H2S from biogas. In this study, electrochemical oxidation, adsorption by zeolite, pressure swing adsorption, adsorption on activated carbon, adsorption on metal oxides, adsorption on nano-particles, metal sulfide precipitation, water scrubbing, membrane separation, organic solvents (amine), microaeration, and purification by sulfur-oxidizing bacteria (anoxic, aerobic, anaerobic), will be introduced, while their pros and cons are compared and discussed in detail.

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“…The exposed concentration beyond 500 ppm causes a loss of consciousness (Azargohar et al 2011). The conventional methods for H 2 S treatment contain the biological treatment (Barbusinski et al 2021), wet scrubbing (Wang et al 2020), low temperature plasma technology (Feng et al 2021), advanced oxidation (Gao et al 2022), special activated carbon adsorption (Ning et al 2018;Shen et al 2018;Li et al 2022). Among these methods, adsorption is one of the most effective methods for deodorization and has been widely used.…”

Section: Introductionmentioning

confidence: 99%

Effect of Catalytic Factors of Activated Carbon and Gas Stream Properties on H2S Catalytic Conversion

Liu

Zuo

2023

Water Air Soil Pollut

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Catalysts loaded activated carbons are the widely used adsorbents to remove H 2 S for puri cation of the gas streams. Virgin carbon, single and mixed catalyst loaded carbon are used as adsorbents. Their performance of H 2 S catalytic conversion were studied by evaluating their breakthrough curves in order to investigate the effect of catalysts contents, categories, assistant catalysts and virgin carbon properties on the H 2 S adsorption. The effects of gas stream properties on H 2 S catalytic adsorption are also investigated. The results show the H 2 S uptake amount is increased with catalyst contents and the assistant catalysts can enhance H 2 S catalytic conversion. NaOH loaded carbon has has better catalytic performance than KOH loaded carbon with same contents. Carbons after impregnation keep a relative high pore volume between 2-20 nm, which is bene cial to give full play to the catalysis. The relative humidity and oxygen can enhance the H 2 S adsorption capacity and play important roles on H 2 S adsorption. CTC has little effects on the impregnated carbon for H 2 S catalytic conversion. Carbon impregnated with speci c catalyst can accelerate target substance adsorption and will restrict the pore volume for organics adsorption.

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Oxidation absorption of gaseous H2S using UV/

Cited by 4 publications

References 42 publications

Experimental Research on the Selected Biofiltration Materials Under Dynamic Conditions

Experimental Research on the Selected Biofiltration Materials Under Dynamic Conditions

Analysis and Evaluation of the Biogas Purification Technologies From H2s

Effect of Catalytic Factors of Activated Carbon and Gas Stream Properties on H2S Catalytic Conversion

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