High temperature steam gasification of wastewater sludge

Nipattummakul, Nimit; Ahmed, Islam; Kerdsuwan, Somrat; Gupta, Ashwani K.

doi:10.1016/j.apenergy.2010.07.001

Cited by 102 publications

(38 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Gasification characteristics of the pyrochar and hydrochar were evaluated in terms of hydrogen yield, lower heating value (LHV) of the product gas and gasification efficiency [15,21]. Besides, an index of energy recovery efficiency (ERE) [22] was used in this work to evaluate the effect of two different pretreatments on the entire energy balance, which is calculated as:…”

Section: Steam Gasification Experimentsmentioning

confidence: 99%

Gasification characteristics of hydrochar and pyrochar derived from sewage sludge

Gai

Chen

et al. 2016

Energy

View full text Add to dashboard Cite

Section: Steam Gasification Experimentsmentioning

confidence: 99%

Gasification characteristics of hydrochar and pyrochar derived from sewage sludge

Gai

Chen

et al. 2016

Energy

View full text Add to dashboard Cite

“…Carbonization products from brown coal gave increased gasification activity as a result of increased carbon compound interaction with water vapor (Kuznetsov et al 2015). Steam gasification of sewage sludge increased the hydrogen yield three-fold compared with air gasification (Nipattummakul et al 2010). Finally, Ahmed and Gupta (2011) gasified woodchip chars with steam and CO2.…”

Section: Introductionmentioning

confidence: 97%

Investigation of the Reaction Behavior of Albizia gummifera Wood under Steam Gasification with Varied Partial Pressures and Gasification Temperatures

Oluoti¹,

Richards²

2016

BioResources

View full text Add to dashboard Cite

The astronomical increase in global energy demand makes locating energy sources other than fossil fuels worthwhile. The use of tropical biomass wood waste as a renewable energy source was investigated in this study. The thermal conversion analysis of Albizia gummifera (ayinre) was carried out in a thermobalance reactor via steam gasification under varying temperature (700 to 1000 °C) and steam partial pressure (0.020 to 0.050 MPa). The experimental data was evaluated using three gas-solid reaction models. The modified volume reaction model (mVRM) gave the overall highest coefficient of determination (0.9993) and thereby the best conversion prediction. The observed char activation constant rates (from paired reaction conditions) indicated, on average, an increase in reactivity as the parameters increased. The results showed that the activation energy of the mVRM gave the lowest value (32.54 kJ/mol) compared with those of the shrinking core model (SCM) and the volume reaction model (VRM) (49.29 and 49.89 kJ/mol, respectively).

show abstract

“…Since then, numerous studies have been performed at laboratory plants [14e17] and the process has even been tried at demonstration and pilot scale [18e20]. Most of these studies used air as a gasification medium, but steam gasification or supercritical water gasification of sewage sludge have also been performed in order to enhance H 2 production and improve gas quality [21,22]. However, the addition of steam into a gasification process accelerates a series of endothermic reactions that result in a temperature decrease, making it more difficult to achieve an autothermal process [23,24].…”

Section: Introductionmentioning

confidence: 99%

Energetic assessment of air-steam gasification of sewage sludge and of the integration of sewage sludge pyrolysis and air-steam gasification of char

Gil-Lalaguna

Sánchez

Murillo

et al. 2014

Energy

View full text Add to dashboard Cite

a b s t r a c tThermo-chemical treatment of sewage sludge is an interesting option for recovering energy and/or valuable products from this waste. This work presents an energetic assessment of pyrolysis and gasification of sewage sludge, also considering the prior sewage sludge thermal drying and the gasification of the char derived from the pyrolysis stage. Experimental data obtained from pyrolysis of sewage sludge, gasification of sewage sludge and gasification of char (all of these performed in a lab-scale fluidized reactor) were used for the energetic calculations. The results show that the energy contained in the product gases from pyrolysis and char gasification is not enough to cover the high energy consumption for thermal drying of sewage sludge. Additional energy could be obtained from the calorific value of the pyrolysis liquid, but some of its properties must be improved facing towards its use as fuel. On the other hand, the energy contained in the product gas of sewage sludge gasification is enough to cover the energy demand for both the sewage sludge thermal drying and the gasification process itself. Furthermore, a theoretical study included in this work shows that the gasification efficiency is improved when the chemical equilibrium is reached in the process.

show abstract

High temperature steam gasification of wastewater sludge

Cited by 102 publications

References 15 publications

Gasification characteristics of hydrochar and pyrochar derived from sewage sludge

Gasification characteristics of hydrochar and pyrochar derived from sewage sludge

Investigation of the Reaction Behavior of Albizia gummifera Wood under Steam Gasification with Varied Partial Pressures and Gasification Temperatures

Energetic assessment of air-steam gasification of sewage sludge and of the integration of sewage sludge pyrolysis and air-steam gasification of char

Contact Info

Product

Resources

About