Steam co-gasification of iron-loaded biochar and low-rank coal

Shen, Lingbo; Murakami, Kenji

doi:10.1002/er.3565

Cited by 7 publications

(11 citation statements)

References 23 publications

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“…The particle size, the proximate, and the ultimate analyses were identical to our previous studies [17] as shown in Tables 1 and 2. The iron species was a commercial Fe 2 O 3 (α-Fe 2 O 3 ).…”

Section: Experimental Samplessupporting

confidence: 53%

“…The form of iron catalyst after pyrolysis and steam gasification was measured by XRD under conditions that were identical to what was previously reported [17].…”

Section: Characterization Of the Pyrolyzed Char And Gasified Residuementioning

confidence: 85%

“…As reported in the precious study [17], the main reactions under the conditions should be as follows: …”

Section: Resultsmentioning

confidence: 99%

“…As such, iron-loaded biochar can be used as raw sample and as catalyst for gasification [17]. In this method, the iron-loaded biochar must be initially prepared with the iron catalyst loaded with impregnation.…”

Section: Research Articlementioning

confidence: 99%

“…In previous study, iron-loaded biochar was used and shown to increase gasification of AD by 20% when compared to a coal sample with the same amount of iron catalyst. As such, iron-loaded biochar can be used as raw sample and as catalyst for gasification [17]. In this method, the iron-loaded biochar must be initially prepared with the iron catalyst loaded with impregnation.…”

Section: Research Articlementioning

confidence: 99%

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Effect of Fe₂O₃ on steam gasification of subbituminous coal/woody biomass mixture

Shen

Nakamura

Murakami

2018

Energy Science & Engineering

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This study investigated the steam gasification of Indonesian Adaro coal and Japanese cedar mixed in a 1:1 ratio with the physical addition of 10 wt% Fe 2 O 3 in 50 vol% H 2 O at ambient atmospheric pressure and 800°C for 1 h. The primary objective of this work was to examine the effectiveness of an iron catalyst on the interaction between Indonesian Adaro coal and Japanese cedar. The study demonstrated that the H 2 evolution amount for co-gasification of Japanese cedar and Adaro coal (with 1:1 ratio in weight) without a Fe catalyst was 100 mmol/g-char. However, the H 2 evolution amount for co-gasification with the addition of Fe 2 O 3 was 152 mmol/g-char. The increase in the cogasification for H 2 evolution was based on a change in the char structure during pyrolysis and gasification. 282

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Section: Experimental Samplessupporting

confidence: 53%

“…The form of iron catalyst after pyrolysis and steam gasification was measured by XRD under conditions that were identical to what was previously reported [17].…”

Section: Characterization Of the Pyrolyzed Char And Gasified Residuementioning

confidence: 85%

“…As reported in the precious study [17], the main reactions under the conditions should be as follows: …”

Section: Resultsmentioning

confidence: 99%

Section: Research Articlementioning

confidence: 99%

Section: Research Articlementioning

confidence: 99%

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Effect of Fe₂O₃ on steam gasification of subbituminous coal/woody biomass mixture

Shen

Nakamura

Murakami

2018

Energy Science & Engineering

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Impacts of char structure evolution and inherent alkali and alkaline earth metallic species catalysis on reactivity during the coal char gasification with CO₂ /H₂ O

Bai

Yang

et al. 2018

Int J Energy Res

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Summary In this work, we studied the effects of char structural evolution and alkali and alkaline earth metallic species (AAEMs) catalysis on the reactivity during the char gasification with CO2, H2O, and their mixture. The gasified chars with different carbon conversion levels were prepared, and their physicochemical structures were characterized via nitrogen adsorption and FT‐Raman techniques. The concentrations of AAEMs in different modes were obtained by the sequential chemical extraction method. The reactivities of the raw and gasified chars were analyzed by the thermogravimetric analysis. The gasification atmospheres had varied effects on the physicochemical structure of coal char. The gasified char obtained in the CO2 atmosphere had a lower aromatic condensation degree compared with that obtained in the H2O atmosphere, irrespective of the temperature. The impact of the atmospheres on the specific surface area of the char varied with the temperature because H2O and CO2 have different routes of development of pore structure with coal char. A large specific surface area facilitates the exposure and dispersion of more AAEMs on the surface of the channel, which is conducive to their contact with the gasification agent to play the catalytic role. Thus, the reactivity of the gasified char is well correlated with its specific surface area at different gasification temperatures. In the absence of AAEMs, the chemical structure of coal char becomes the dominant factor affecting the reactivity.

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Microwave pretreatment on microalgae: Evolution of gas and char in chemical looping gasification

Jiang

2018

Int J Energy Res

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Summary Chemical looping gasification (CLG) of Chlorella vulgaris was investigated by TGA and FTIR technology. The release characteristic and evolution behavior of gaseous products and bio‐char in different conditions were analyzed to evaluate the effects of CLG and microwave pretreatment. The results indicated that the gas production of CLG was higher than that of SiO2:Chlorella, and it would be higher after microwave pretreatment. CO, CO2, and CH4 were mainly produced in the pyrolysis and gasification stages. After adding Fe2O3, C―O, C═O, and C═C compounds decreased by 3.75%, 20.86%, and 24.72%, respectively. But more CO, CO2, and CH4 were produced. Microwave pretreatment was helpful for reducing the degrees of hydrogen‐rich, aliphatic structure, aromatization, and oxygen‐rich in char. Moreover, microwave pretreatment promoted the reduction of C―O, C═O, and C═C compounds. However, CO increased by 55.63%, and CO2 decreased by 2.31% in this condition. Therefore, microwave pretreatment was beneficial to CLG reaction.

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Steam co-gasification of iron-loaded biochar and low-rank coal

Cited by 7 publications

References 23 publications

Effect of Fe₂O₃ on steam gasification of subbituminous coal/woody biomass mixture

Effect of Fe₂O₃ on steam gasification of subbituminous coal/woody biomass mixture

Impacts of char structure evolution and inherent alkali and alkaline earth metallic species catalysis on reactivity during the coal char gasification with CO₂ /H₂ O

Microwave pretreatment on microalgae: Evolution of gas and char in chemical looping gasification

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Steam co-gasification of iron-loaded biochar and low-rank coal

Cited by 7 publications

References 23 publications

Effect of Fe2O3 on steam gasification of subbituminous coal/woody biomass mixture

Effect of Fe2O3 on steam gasification of subbituminous coal/woody biomass mixture

Impacts of char structure evolution and inherent alkali and alkaline earth metallic species catalysis on reactivity during the coal char gasification with CO2 /H2 O

Microwave pretreatment on microalgae: Evolution of gas and char in chemical looping gasification

Contact Info

Product

Resources

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Effect of Fe₂O₃ on steam gasification of subbituminous coal/woody biomass mixture

Effect of Fe₂O₃ on steam gasification of subbituminous coal/woody biomass mixture

Impacts of char structure evolution and inherent alkali and alkaline earth metallic species catalysis on reactivity during the coal char gasification with CO₂ /H₂ O