Gasification of sugarcane bagasse in supercritical water; evaluation of alkali catalysts for maximum hydrogen production

Sheikhdavoodi, Mohammad Javad; Almassi, Morteza; Ebrahimi-Nik, Mohammadali; Kruse, Andrea; Bahrami, Houshang

doi:10.1016/j.joei.2014.10.005

Cited by 93 publications

(32 citation statements)

References 62 publications

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“…The considerable increase in H 2 and CO 2 yields with lower CO yields were attributed to enriched WGS reaction by KOH and NaOH. The alkali catalysts promote WGS reaction tending to shift the equilibrium toward H 2 and CO 2 [37]. There was a three-fold increase in H 2 yields from catalytic gasification than non-catalytic gasification at similar operating conditions.…”

Section: Effect Of Catalystmentioning

confidence: 94%

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Supercritical water gasification of fructose as a model compound for waste fruits and vegetables

Nanda

Reddy

Hunter

et al. 2015

The Journal of Supercritical Fluids

100

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Section: Effect Of Catalystmentioning

confidence: 94%

“…The alkali catalysts also favor water-gas shift reaction that considerably improves H 2 and CO 2 yields [37].…”

Section: Effect Of Catalystmentioning

confidence: 99%

Supercritical water gasification of fructose as a model compound for waste fruits and vegetables

Nanda

Reddy

Hunter

et al. 2015

The Journal of Supercritical Fluids

100

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“…Experimental studies have shown that increment of temperature follows with a significant effect on SCW gasification and promote the total gas and hydrogen yields (Sheikhdavoodi et al 2014;Azadi et al 2009). Figure 3 demonstrates the variation of main gaseous yields with temperatures from 400 to 1000°C.…”

Section: Effect Of Temperaturementioning

confidence: 99%

“…Sugarcane bagasse is one of the most abundant lignocellulosic feedstock in Iran. Million tons of it is wasted or burned annually in the lack of conversion industries (Sheikhdavoodi et al 2014). It can be fermented via biological conversion for ethanol production or gasified via thermochemical conversion for syngas production (Tavasoli et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Gasification of sugarcane bagasse in supercritical water media for combined hydrogen and power production: a novel approach

Safari

Tavasoli

Ataei

2016

Int. J. Environ. Sci. Technol.

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A novel process based on supercritical water gasification has been used in this study for co-production of hydrogen and power from sugarcane bagasse as one of the main agricultural wastes of Iran. The cycle of the process was designed first, and then, the thermodynamic equilibrium model of the gasification process was simulated using ASPEN PLUS. The effects of temperature and feed concentration on molar fraction of main components of produced gas were investigated. The temperature was directly correlated with hydrogen production in which hydrogen and carbon monoxide production was favored at higher temperatures. The maximum hydrogen production occurred in the sugarcane bagasse concentrations about 20-30 wt%. Palladium membrane as a metallic dense membrane was used for separation of highpurity hydrogen. Hydrogen production of 8.55 kg/h and electrical power generation of 56 kW were obtained for the 20 wt% mixture of bagasse with a mass flow rate of 1000 kg/ h, reactor pressure of 300 bars and temperature of 700°C.

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“…Supercritical water (SCW) is the water that higher than its critical point (temperature > 3748C, pressure > 22.1 MPa). Also, Sheikhdavoodi et al's study on SCWG of bagasse achieved higher hydrogen gasification efficiency (the ratio of hydrogen in gas phase to hydrogen in feed stock) of 250% with KOH catalyst [3]. SCW features low dielectric constant, high mass-transport and complete miscibility of hydrocarbons, which makes the reactions more quickly and efficiently without interfacial resistance.…”

Section: Introductionmentioning

confidence: 99%

Interactive effects of phenol, naphthalene and acetic acid during the supercritical water gasification process

Wang

Gao

Yang

et al. 2017

Env Prog and Sustain Energy

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Phenol, acetic acid, and naphthalene, as the most common and refractory intermediates during the supercritical water gasification (SCWG) of biomass were selected as the model compounds, and the their mutual interactive effects during the SCWG process were investigated. The gasification performances of one‐component solutions and their two‐ and three‐components mixtures were thoroughly studied in a tubular reactor at 550°C, 25 MPa, reaction time of 20 s. Results showed that for the one‐component solutions, the difficulty degree of degradation order of the three compounds was naphthalene > phenol > acetic acid, and concentration of the reactants showed little influence on the gasification efficiencies. For the two‐components solutions, acetic acid promoted the degradation of phenol and naphthalene, and the gasification of phenol and naphthalene inhibited each other. The 3D curved surface for gas yields and total organic concentration (TOC) removal efficiencies of three‐components mixture clearly showed that the increasing concentration of acetic acid increased the H2 and CO2 yields. While the interactive effects of the three compounds were favorable for CH4 yield. Acetic acid played a positive effect on TOC removal, while the increasing concentration of naphthalene was unfavorable for the degradation of TOC, and the inhibition effect was higher when phenol existed. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 1140–1148, 2018

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Gasification of sugarcane bagasse in supercritical water; evaluation of alkali catalysts for maximum hydrogen production

Cited by 93 publications

References 62 publications

Supercritical water gasification of fructose as a model compound for waste fruits and vegetables

Supercritical water gasification of fructose as a model compound for waste fruits and vegetables

Gasification of sugarcane bagasse in supercritical water media for combined hydrogen and power production: a novel approach

Interactive effects of phenol, naphthalene and acetic acid during the supercritical water gasification process

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