Investigation of slagging characteristics and anti-slagging applications for Indonesian coal gasification

Fan, Yanqi; Zhang, Haixia; Lyu, Qinggang; Zhu, Zhengwang

doi:10.1016/j.fuel.2020.117285

Cited by 21 publications

(9 citation statements)

References 20 publications

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“…In this respect, Figure a shows the trend in reactivity as a function of K in the olive pomace samples. An increase in K clearly reduced gasification reactivity whose cause may have been twofold: olive pomace had the highest content of K (as shown in Table ), and thus, adding diatomaceous earth only accounted for 3 wt % of the total (from 23.0 to 23.7 g/L for S-Op and S-Op-50D, respectively), which could be considered negligible; second, the high content of Si could have promoted deactivation of K as a catalyst. , In this study, olive pomace was high in Si (Table ), which increased fivefold on adding diatomaceous earth. Thus, Si was more significant than K, which might explain why gasification reactivity did not improve when diatomaceous earth was added to the olive pomace.…”

Section: Resultsmentioning

confidence: 61%

Olive Waste Valorization Through TGA-MS Gasification: A Diatomaceous Earth Effect

Puig-Gamero

Sánchez-Silva

Sánchez

2021

Ind. Eng. Chem. Res.

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The effect of diatomaceous earth on gasification of olive pomace and olive stone was studied by thermogravimetric analysis with mass spectrometry (TGA-MS). Additionally, gas emissions, the H2/CO ratio, and gasification reactivity were evaluated. First, a preliminary study of the effect of particle size on olive waste gasification was performed to select the most appropriate from a technical and industrial point of view. With olive pomace, the larger the particle size, the lower H2/CO and reactivity. However, with olive stone, optimum results were observed with the largest particles. Subsequently, olive waste was mixed with different percentages (10, 25, and 50 wt %) of diatomaceous earth. When olive pomace contained diatomaceous earth, even though there was no substantial improvement in reactivity, syngas quality in terms of H2/CO was significantly enhanced and increased by up to four times. However, the diatomaceous earth effect on olive stone gasification was more remarkable, enhancing both reactivity and the H2/CO ratio. Different behaviors in the biomasses were due to the different impacts of the alkali and alkaline earth metals on the diatomaceous earth. Whereas both of these made positive contributions to the olive stone, only the latter had a significant influence on olive pomace.

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Section: Resultsmentioning

confidence: 61%

Olive Waste Valorization Through TGA-MS Gasification: A Diatomaceous Earth Effect

Puig-Gamero

Sánchez-Silva

Sánchez

2021

Ind. Eng. Chem. Res.

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“…These elements can promote the deactivation of K and Na as catalysts. They react with Al and Si to form stable and unreactive aluminosilicates at high temperatures (1000–1100 °C), causing inhibition of the gasification reaction . However, when the K amount and the K/Al ratio in the blend increased by addition of biomass to petcoke, petcoke gasification can be enhanced …”

Section: Resultsmentioning

confidence: 99%

Binary Blends Versus Ternary Blends in Steam Cogasification by Means of TGA–MS: Reactivity and H₂/CO Ratio

Puig-Gamero

Alcazar-Ruiz

Sánchez

et al. 2020

Ind. Eng. Chem. Res.

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Cogasification of olive pomace, almond shell, and petcoke was carried out by thermogravimetric analysis coupled with mass spectrometry. Binary and ternary blends were compared in terms of their reactivity, outlet-gas emissions, H2/CO ratios of effluents, and synergistic effect. Synergistic and antagonistic effects were observed with cogasification of blends, but that depended on the ratios of raw materials in the feed. In this regard, the higher the biomass content, the greater the weight loss, the higher the decomposition rate and, thus, the higher the gasification reactivity. Moreover, the synergistic effect on the gasification of the raw materials did not show a clear trend in gas emissions. In general, the higher the biomass content, the greater the H2 and CO2 yields, and the less CO was released. On comparing binary and ternary blends, it was seen that the former presented better results in most parameters studied.

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“…12 The Na conversion rate (indicated by the calculation of the retention ratio of Na in the gasification residue) was significantly affected by the temperature, and the retention ratio of Na and K was significantly reduced with increased temperature. 13 The presence of large amounts of Fe and Ca in the ash increased the ash deposition rate. 14 The introduction above shows that temperature and chemical composition are the main factors determining the slagging behavior in the gasifier.…”

Section: Introductionmentioning

confidence: 99%

“…The fouling rate increases with the increasing gasification temperature as well as increased Fe, Ca, and Mg contents . The Na conversion rate (indicated by the calculation of the retention ratio of Na in the gasification residue) was significantly affected by the temperature, and the retention ratio of Na and K was significantly reduced with increased temperature . The presence of large amounts of Fe and Ca in the ash increased the ash deposition rate …”

Section: Introductionmentioning

confidence: 99%

Chemical Composition Changes during the Commercial Entrained-Flow General Electric and Gaskombinat Schwarze Pumpe Coal Gasification Processes

et al. 2020

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The chemistry of the feed coals and coal gasification residues derived from the commercial entrained-flow General Electric (GE) and Gaskombinat Schwarze Pumpe (GSP) coal gasification plants in China was investigated by proximate and ultimate and X-ray fluorescence (XRF) spectrometer analyses. The chemical compositions of the feed coals and gasification residues derived from the commercial GE and GSP coal gasification plants provided an understanding of the behaviors of the chemical components during entrained-flow coal gasification. The fate of chemical compositions during the commercial entrained-flow coal gasification was evaluated through systematic sampling and chemical analyses. Although the feed coals used in the GE and GSP coal gasification plants were generally similar in properties, the coal gasification residue ashes derived from the GSP gasification were more heterogeneous than those from the GE gasification. However, more proportions of carbon in the feed coal were converted during the GSP coal gasification according to the unreacted carbon contents in the gasification residues indicated by the loss on ignition value. Si and Al were stable in both the GE and GSP gasification processes, while Mg, Na, and P tended to be more volatile. However, the ashes of the GE coal gasification residues and GSP coal gasification residues were respectively ferricalsialic and calsialic, as was mainly determined by the properties of the feed coals instead of the gasification technology. A comparison to previous research showed that the GE and GSP coal gasification residues have a potential for carbon recovery and being used as the raw materials of inorganic materials such as geopolymers.

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Investigation of slagging characteristics and anti-slagging applications for Indonesian coal gasification

Cited by 21 publications

References 20 publications

Olive Waste Valorization Through TGA-MS Gasification: A Diatomaceous Earth Effect

Olive Waste Valorization Through TGA-MS Gasification: A Diatomaceous Earth Effect

Binary Blends Versus Ternary Blends in Steam Cogasification by Means of TGA–MS: Reactivity and H₂/CO Ratio

Chemical Composition Changes during the Commercial Entrained-Flow General Electric and Gaskombinat Schwarze Pumpe Coal Gasification Processes

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Investigation of slagging characteristics and anti-slagging applications for Indonesian coal gasification

Cited by 21 publications

References 20 publications

Olive Waste Valorization Through TGA-MS Gasification: A Diatomaceous Earth Effect

Olive Waste Valorization Through TGA-MS Gasification: A Diatomaceous Earth Effect

Binary Blends Versus Ternary Blends in Steam Cogasification by Means of TGA–MS: Reactivity and H2/CO Ratio

Chemical Composition Changes during the Commercial Entrained-Flow General Electric and Gaskombinat Schwarze Pumpe Coal Gasification Processes

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Product

Resources

About

Binary Blends Versus Ternary Blends in Steam Cogasification by Means of TGA–MS: Reactivity and H₂/CO Ratio