Effect of biomass fuel ash and bed material on the product gas composition in DFB steam gasification

Fürsatz, Katharina; Fuchs, Josef; Benedikt, Florian; Kuba, Matthias; Hofbauer, Hermann

doi:10.1016/j.energy.2020.119650

Cited by 28 publications

(16 citation statements)

References 62 publications

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“…Ca-and P-rich chicken manure has also been studied for its interactions with K-feldspar, fresh/activated olivine, and limestone using a 100 kWth DFB rig. 50 However, the layer formation process on olivine with P-rich chicken manure has not been described as what has been done for Kfeldspar. Furthermore, the influence of K species on the layer formation of olivine particles has received even less attention, and each atmosphere condition may influence the agglomeration behavior 51,52 as well as carbon conversion.…”

Section: Introductionmentioning

confidence: 99%

“…A detailed investigation of each operating condition of a DFB gasifier, which requires isolation between the two reactors, is needed to address the knowledge gaps. Ca- and P-rich chicken manure has also been studied for its interactions with K-feldspar, fresh/activated olivine, and limestone using a 100 kWth DFB rig . However, the layer formation process on olivine with P-rich chicken manure has not been described as what has been done for K-feldspar.…”

Section: Introductionmentioning

confidence: 99%

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Agglomeration of Olivine with Potassium- or Silicon-Rich Agricultural Residues Under Conditions Relevant to Dual Fluidized Bed Gasification

Nathan

Kuba

et al. 2022

Energy Fuels

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The agglomeration characteristics of olivine-and potassium (K)-rich grape marc or silicon (Si)-rich wheat straw were studied in a laboratory-scale fluidized reactor and compared under air combustion, steam gasification, or CO 2 gasification atmospheres at temperatures relevant to a dual fluidized bed gasifier. Agglomeration with grape marc is found to be induced mostly by the formation of adhesive K-rich layers onto the olivine, a process that is significantly augmented in a steam atmosphere compared to that in the air or CO 2 . The formation of an initial Krich outer layer, which is caused by the mere physical attachment of K-species onto the olivine surface, facilitated the formation of an inner layer. This inner layer exhibits chemical reactions between grape marc ash and olivine, with the ash elements involved in the chemical reactions differing between combustion and steam gasification environments. Agglomeration with a wheat straw is most significant under air combustion conditions and depends primarily on the temperature rather than on the atmosphere.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Agglomeration of Olivine with Potassium- or Silicon-Rich Agricultural Residues Under Conditions Relevant to Dual Fluidized Bed Gasification

Nathan

Kuba

et al. 2022

Energy Fuels

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“…Since the syngas from FR needs to be cooled down for the removal of ashes in a bag filter, we can expect some ash deposition on the heat transfer surfaces resulting in corrosion, but large-scale pilot projects on DFB gasification such as GoBiGas have shown to work well without any major corrosion issues [5]. For CLG, the presence of alkali and alkaline earth minerals (AAEM) in the ash may aid in catalyzing char reaction and the WGS reaction in FR leading to better syngas yield and higher H 2 /CO ratio [45,46] whereas the presence of chlorine in ash can result in the reaction of chlorine with oxygen carrier leading to deactivation of the oxygen carrier [47]. Table 3 shows the ultimate and proximate analysis of the typical biomass in Nordic countries [48].…”

Section: Biomassmentioning

confidence: 99%

Production of Aviation Fuel with Negative Emissions Via Chemical Looping Gasification of Biogenic Residues: Full Chain Process Modelling and Techno-Economic Analysis

et al. 2022

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“…With the operating parameters in the operation period 2018, the gasification ran for the longer time (95 h) than the operation period 2017 (34.5 h). Biomass ash, calcium hydroxide and dolomite were added to the olivine during the operation periods 2017 and 2018 to increase activity of the bed material for better plant performance [27,34]. As mentioned before, calcium, which influences the tar reduction, requires time to interact and be incorporated into the bed material.…”

Section: Product Gas Composition and Tar Concentration In The Product...mentioning

confidence: 99%

Influence of Gasification Operating Parameters on Performance of the Nong Bua Dual Fluidized Bed Gasification System in Thailand

Prasong

Siriwongrungson

Hongrapipat³

et al. 2021

Curr. Appl. Sci. Technol.

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Gasification system performance generally depends on feed moisture content, activity of bed material, gasifier and combustor temperatures, and scrubber media. The tar concentration and gas composition of product gas are two indicators of the gasification system performance. In this research, the effects of gasifier temperature and the activity of bed material on the tar concentration and gas composition of the product gas produced from a dual fluidized bed (DFB) gasification system power plant were investigated. The DFB gasification system power plant is located in Nong Bua district, Nakhon Sawan province, Thailand. Two periods of gasification operation were examined. These two periods were when the olivine was freshy activated and then after a period of operation. The gasifier temperature had several peaks during the operation, which caused the product gas composition to fluctuate. When the olivine had been used for a period, the percentage of hydrogen was approximately 3% higher than when the olivine had been freshly activated, and a lower heating value was observed, which was probably due to lower heating value of hydrogen. The tar concentration was substantially lower when compared with the freshly activated olivine. When the olivine was used for a period, the average tar concentration was 56±22 mg/Nm3 (this is after 95 h continuous operating time) while the average tar concentration of the freshly activate olivine was 872±125 mg/Nm3 (which was after 34.5 h continuous operating time). It was concluded that the average tar concentration and gas composition were influenced by the activity of the bed material and the gasification temperature.

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Effect of biomass fuel ash and bed material on the product gas composition in DFB steam gasification

Cited by 28 publications

References 62 publications

Agglomeration of Olivine with Potassium- or Silicon-Rich Agricultural Residues Under Conditions Relevant to Dual Fluidized Bed Gasification

Agglomeration of Olivine with Potassium- or Silicon-Rich Agricultural Residues Under Conditions Relevant to Dual Fluidized Bed Gasification

Production of Aviation Fuel with Negative Emissions Via Chemical Looping Gasification of Biogenic Residues: Full Chain Process Modelling and Techno-Economic Analysis

Influence of Gasification Operating Parameters on Performance of the Nong Bua Dual Fluidized Bed Gasification System in Thailand

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