Hydrogen-Rich Gas Formation Characteristics under Microwave Catalytic Pyrolysis of Sewage Sludge

2013 ◽  
Vol 781-784 ◽  
pp. 2429-2432
Author(s):  
Wei Chao Yu ◽  
Wen Yi Deng ◽  
Ya Xin Su
Keyword(s):  
Sewage Sludge ◽  
Catalytic Pyrolysis ◽  
Single Mode ◽  
Steam Gasification ◽  
Experimental Conditions ◽  
Gas Formation ◽  
Microwave Reactor ◽  
Co Concentration ◽  
Dried Sludge ◽  
Steam Flowrate

Microwave catalytic pyrolysis of sewage sludge were conducted on a single mode microwave reactor. The effects of CaO and steam on hydrogen-rich gas formation characteristics were analyzed. The results indicated that the CaO can improve the formation of H2and CO. When CaO in sewage sludge increased from 0 to 0.75 g/(g dried sludge), the H2and CO concentration increased from 62 vol.% to 77 vol.%, while CH4and CO2concentrations decreased from 28 vol.% to 9 vol.%. The steam can also improve the formation of H2and CO, with 1.59 g/min of the steam flowrate, the H2and CO concentration increased to the maximum of 81 vol.%, and the CH4and CO2concentration decreased to the minimum of 16 vol.%. When the steam gasification was coupled with the CaO catalyzing, the H2concentration can reach to 61 vol.%, which was 79.3% higher than the experimental conditions absent of steam and CaO.

Hydrogen-Rich Gas Production from Microwave Pyrolysis of Sewage Sludge at High Temperature

2012 ◽  
Vol 610-613 ◽  
pp. 2302-2306
Author(s):  
Wen Yi Deng ◽  
Xiao Lei Wang ◽  
Wei Chao Yu ◽  
Ya Xin Su
Keyword(s):  
Particle Size ◽  
Sewage Sludge ◽  
Moisture Content ◽  
Single Mode ◽  
Gas Production ◽  
Pyrolysis Gas ◽  
Microwave Pyrolysis ◽  
Co Concentration ◽  
Gas Products ◽  
Fixed Structure

Microwave pyrolysis of sewage sludge was conducted in a single-mode microwave oven. The influencing effects of experimental factors, including particle size and moisture content of sewage sludge, pyrolysis temperature, and shape of microwave adsorber, on concentration of pyrolysis gas products were studied. The results indicated that with the decrease of particle size, the H2 concentration increased from 31 vol.% to 34 vol.%, and CO concentration increased from 17 vol.% to 22 vol.%. When the moisture content of sewage sludge increased from 0 to 83 wt.%, the H2 concentration increased from 32 vol.% to 42 vol.%, and the CO concentration increased from 20 vol.% to 31 vol.%. Compared with microwave adsorber in powder phase, the microwave adsorber in fixed structure can transform more volatile compounds to uncondensable gas, and the concentrations of H2 and CO were also slightly increased.

Syngas Production from Two-Stage Sorption-Enhanced Steam Gasification of Sewage Sludge over Bifunctional Ni-Ca Catalyst

2021 ◽  
Vol 35 (6) ◽  
pp. 4997-5005
Author(s):  
Xiaoxia Yang ◽  
Shengshen Gu ◽  
Amanj Kheradmand ◽  
Yijiao Jiang
Keyword(s):  
Sewage Sludge ◽  
Steam Gasification ◽  
Two Stage ◽  
Syngas Production

scholarly journals Methodology for the synthesis of methacrylate monomers using designed single mode microwave applicators

2019 ◽  
Vol 4 (8) ◽  
pp. 1472-1476 ◽  
Author(s):  
Adam A. Dundas ◽  
Andrew L. Hook ◽  
Morgan R. Alexander ◽  
Samuel W. Kingman ◽  
Georgios Dimitrakis ◽  
...  
Keyword(s):  
High Throughput ◽  
Single Mode ◽  
Microwave Reactor ◽  
Reactor Geometry ◽  
Single Well ◽  
Methacrylate Monomers ◽  
Microwave Applicators

A novel single-well prototype high throughput microwave reactor geometry has been produced and shown to be capable of synthesizing an array of non-commercially available methacrylate monomers.

scholarly journals Behaviour of dolomite, olivine and alumina as primary catalysts in air–steam gasification of sewage sludge

Fuel ◽  
2011 ◽  
Vol 90 (2) ◽  
pp. 521-527 ◽  
Author(s):  
Juan Manuel de Andrés ◽  
Adolfo Narros ◽  
María Encarnación Rodríguez
Keyword(s):  
Sewage Sludge ◽  
Steam Gasification

scholarly journals TG pyrolysis of a mixture of dried sludge from urban wastewater and wood pellets and identification of the composition of the resulting gases by infrared spectroscopy

Energetika ◽  
2021 ◽  
Vol 67 (1) ◽  
Author(s):  
Giedrius Stravinskas ◽  
Anupras Šlančiauskas
Keyword(s):  
Infrared Spectroscopy ◽  
Sewage Sludge ◽  
Mass Loss ◽  
Evolved Gas Analysis ◽  
Waste Incineration ◽  
Small Towns ◽  
Gas Analysis ◽  
Wood Pellets ◽  
Intense Mass ◽  
Dried Sludge

The recent tendency of sewage sludge disposal is targeted towards the gasification for heat generation in small towns far from waste incineration plants. The scope of this article is to present the investigation into the mixture of dried sewage sludge and wood pellets during pyrolysis by thermogravimetry (TG) with evolved gas analysis by TG-coupled Fourier transformation infrared spectroscopy (FTIR) method. The maximum intensity of mass loss of sewage sludge material occurs at 300–310°C temperature and it differs from wood cellulose case of 360°C. The 50:50% mixture of these materials was investigated in more details. Pyrolysis reaction kinetics is described by a variation of three constituent parts from TG data. Prefactor A and activation energy E of the Arrhenius law were found, and reaction order n was determined by the Ozawa method employing Avrami phase change. The maximum of gas evolution is always related to the most intense mass loss, and gas composition correlates with the initial material.

Tunable syngas production from two-stage sorption-enhanced steam gasification of sewage sludge

2021 ◽  
Vol 404 ◽  
pp. 126069 ◽  
Author(s):  
Xiaoxia Yang ◽  
Tao Kan ◽  
Amanj Kheradmand ◽  
Haimei Xu ◽  
Vladimir Strezov ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Steam Gasification ◽  
Two Stage ◽  
Syngas Production

Effects of hydrothermal treatment of sewage sludge on pyrolysis and steam gasification

2015 ◽  
Vol 103 ◽  
pp. 401-407 ◽  
Author(s):  
Jihong Moon ◽  
Tae-Young Mun ◽  
Won Yang ◽  
Uendo Lee ◽  
Jungho Hwang ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Hydrothermal Treatment ◽  
Steam Gasification

scholarly journals Air-steam gasification of sewage sludge in a bubbling bed reactor: Effect of alumina as a primary catalyst

2011 ◽  
Vol 92 (3) ◽  
pp. 433-440 ◽  
Author(s):  
Juan Manuel de Andrés ◽  
Adolfo Narros ◽  
María Encarnación Rodríguez
Keyword(s):  
Sewage Sludge ◽  
Steam Gasification ◽  
Bubbling Bed

Effect of Experimental Conditions on Gas Quality and Solids Produced by Sewage Sludge Cogasification. 2. Sewage Sludge Mixed with Biomass

2008 ◽  
Vol 22 (4) ◽  
pp. 2314-2325 ◽  
Author(s):  
Filomena Pinto ◽  
Rui Neto André ◽  
Helena Lopes ◽  
Mário Dias ◽  
I. Gulyurtlu ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Experimental Conditions

scholarly journals Голографические интерферограммы вибрирующего тонкого дискового резонатора из пьезокерамики при асимметричном нагружении точечной массой

2019 ◽  
Vol 89 (4) ◽  
pp. 603
Author(s):  
В.А. Титов
Keyword(s):  
Holographic Interferometry ◽  
High Intensity ◽  
Single Mode ◽  
Thin Disk ◽  
Point Mass ◽  
Radial Coordinate ◽  
Experimental Conditions ◽  
Electric Excitation ◽  
Energy Interaction ◽  
Piston Mode

AbstractDeformations of the base of a free piezoceramic resonator that represents a thin disk are visualized using holographic interferometry under high-intensity electric excitation at antiresonance frequencies of radial modes. Motion of a loading point mass along the radial coordinate is used to specify identification of partial modes and the total number and energy interaction of such modes. Four topologically compatible modes form a single mode on which the pattern of Lamb modes is superimposed under certain experimental conditions, and an implicit piston mode is obtained.

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