Measurements of the Calorific Value of Methane with the New GERG Reference Calorimeter

Schley, P.; Beck, Mary M.; Uhrig, Martin; Sarge, Stefan M.; Rauch, J.; Haloua, Frédérique; Filtz, Jean-Rémy; Hay, Bruno; Yakoubi, M.; Escande, J.; Benito, Ana M.; Cremonesi, P.

doi:10.1007/s10765-010-0714-z

“…The applied power to the heating resistance was 26.97W which is almost same as calorific value of methane. The heat capacity (C cal ) of the calorimeter vessel can be calculated by (1). In (1), E elec indicates the electrical energy liberated in the calorimeter vessel and T elec means the temperature rise during the electrical heating.…”

Section: Resultsmentioning

confidence: 99%

The calorific value measurement of methane using metal burner

Lee

¹

,

Kwon

²

,

Joung

³

2015

17th International Congress of Metrology

0

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Abstract. With the diversification of the natural gas origin and the variations of the gas composition, the accurate determination of the gas calorific value is very important in the natural gas industry and the national standardization. A new reference gas calorimeter is developed by KRISS in Korea based on the isoperibolic principle. In this principle, a gas burner is placed in the calorimeter vessel filled with water and the calorimeter is placed in the constant temperature water bath. Methane, oxygen, argon gas are injected in the gas burner and the combustion takes place for 30 minutes. The temperature variation of the water in the calorimeter vessel is measured by Pt25 thermometer. Electrical heater coils around the heater and simulates actual combustion process to find the heat capacity of the whole calorimeter vessel. The gas burner is usually made of pyrex glass but it has the disadvantages of the brittleness and irregular manufacturing. A metal burner is first invented and applied in this study to achieve precise manufacturing and standardization as well as the hardness. A calorific value of methane is measured with the developed gas calorimeter and the result shows within 0.4% difference between the experiment and the reference.

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“…The applied power to the heating resistance was 26.97W which is almost same as calorific value of methane. The heat capacity (C cal ) of the calorimeter vessel can be calculated by (1). In (1), E elec indicates the electrical energy liberated in the calorimeter vessel and T elec means the temperature rise during the electrical heating.…”

Section: Resultsmentioning

confidence: 99%

The calorific value measurement of methane using metal burner

Lee

¹

,

Kwon

²

,

Joung

³

2015

17th International Congress of Metrology

0

View full text Add to dashboard Cite

Abstract. With the diversification of the natural gas origin and the variations of the gas composition, the accurate determination of the gas calorific value is very important in the natural gas industry and the national standardization. A new reference gas calorimeter is developed by KRISS in Korea based on the isoperibolic principle. In this principle, a gas burner is placed in the calorimeter vessel filled with water and the calorimeter is placed in the constant temperature water bath. Methane, oxygen, argon gas are injected in the gas burner and the combustion takes place for 30 minutes. The temperature variation of the water in the calorimeter vessel is measured by Pt25 thermometer. Electrical heater coils around the heater and simulates actual combustion process to find the heat capacity of the whole calorimeter vessel. The gas burner is usually made of pyrex glass but it has the disadvantages of the brittleness and irregular manufacturing. A metal burner is first invented and applied in this study to achieve precise manufacturing and standardization as well as the hardness. A calorific value of methane is measured with the developed gas calorimeter and the result shows within 0.4% difference between the experiment and the reference.

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“…The upper calorific value of methane was used (11.04 kWh m -3 CH 4 ) to evaluate the energy recovery from the bioaugmentation (Schley et al, 2010).…”

Section: The Potential Economic and Environmental Impact Of Bioaugmenmentioning

confidence: 99%

Effects of added enzymes on sorted, unsorted and sorted-out barley: A model study on realtime viscosity and process potentials using rapid visco analyser

Shetty

¹

,

Zhuang

²

,

Olsen

³

et al. 2017

Journal of Cereal Science

1

0

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Many ammonia-rich biomass sources, such as manures and protein-rich substrates, are potential inhibitors of the anaerobic digestion (AD) process. It was previously demonstrated that bioaugmentation of Methanoculleus bourgensis MS2T in an ammonia inhibited process in a continuous stirred tank reactor (CSTR), resulted in up to 90 % recovery of the methane production compared to the uninhibited production. However, cultivation of pure strains has practical difficulties due to the need of special growth media and sterile conditions. In contrast, acclimatized enriched cultures have minor sterility requirements. In the current study, an enriched ammonia-tolerant methanogenic culture was bioaugmented in a CSTR reactor operating under ammonia-induced, inhibited-steady-state. The results demonstrated that bioaugmentation, completely counteracted the ammonia toxicity effect. This indicates that a commercial application of bioaugmentation could improve up to 36 % the methane production, the greenhouse gas reduction efficiency and the gross revenue of ammonia inhibited full scale biogas reactors. 16S rRNA gene sequencing showed that bioaugmentation changed the microbial composition of the reactors resulting in higher bacterial and lower archaeal community diversity. The bioaugmented reactor showed a fourfold increase of the abundance of the bioaugmented methanogens compared to the control reactor. This indicates that ammonia-tolerant methanogens established well in the ammonia-inhibited reactor and dominated over the domestic methanogenic population. Finally, this study showed that the enriched culture alleviated ammonia toxicity 25 % more efficiently than the previously used pure culture.

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Measurements of the Calorific Value of Methane with the New GERG Reference Calorimeter

Cited by 34 publications

References 7 publications

The calorific value measurement of methane using metal burner

The calorific value measurement of methane using metal burner

The calorific value measurement of methane using metal burner

Effects of added enzymes on sorted, unsorted and sorted-out barley: A model study on realtime viscosity and process potentials using rapid visco analyser

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