Hydrogen-rich gas production via fast pyrolysis of biophysical dried sludge: Effect of particle size and moisture content on product yields and syngas composition

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.

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Effect of Particle Size and Moisture Content on Cassava Root Pellet Fuel′S Qualities Follow the Acceptance of Pellet Fuel Standard

International Journal of Renewable and Sustainable Energy ◽

10.11648/j.ijrse.20130202.17 ◽

2013 ◽

Vol 2 (2) ◽

pp. 74 ◽

Cited By ~ 1

Author(s):

Sonthi Warajanont

Keyword(s):

Particle Size ◽

Moisture Content ◽

Cassava Root ◽

Effect Of Particle Size

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Quantitative NIR spectroscopy determination of coco-peat substrate moisture content: Effect of particle size and non-uniformity

Infrared Physics & Technology ◽

10.1016/j.infrared.2020.103482 ◽

2020 ◽

Vol 111 ◽

pp. 103482

Author(s):

Bing Lu ◽

Xufeng Wang ◽

Nihong Liu ◽

Can Hu ◽

Hubo Xu ◽

...

Keyword(s):

Particle Size ◽

Moisture Content ◽

Nir Spectroscopy ◽

Effect Of Particle Size ◽

Substrate Moisture

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Effect of Particle Size of Corn Stalk Fast Pyrolysis on Physicochemical Properties of Bio-Oil

Journal of Biobased Materials and Bioenergy ◽

10.1166/jbmb.2010.1109 ◽

2010 ◽

Vol 4 (4) ◽

pp. 391-396 ◽

Cited By ~ 2

Author(s):

Ronghou Liu ◽

Chenjie Shen ◽

Jiawen Wang ◽

Shiyu Liu

Keyword(s):

Particle Size ◽

Physicochemical Properties ◽

Fast Pyrolysis ◽

Corn Stalk ◽

Bio Oil ◽

Effect Of Particle Size

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Issues related to waste sewage sludge drying under superheated steam

Polish Journal of Chemical Technology ◽

10.1515/pjct-2015-0062 ◽

2015 ◽

Vol 17 (4) ◽

pp. 5-14 ◽

Cited By ~ 2

Author(s):

Ihsan Hamawand ◽

Wilton Pereira da Silva ◽

Friederike Eberhard ◽

Diogenes L. Antille

Keyword(s):

Particle Size ◽

Sewage Sludge ◽

Moisture Content ◽

Superheated Steam ◽

Final Particle ◽

Screw Feeder ◽

Rotary Drum ◽

Sludge Drying ◽

Dried Sludge ◽

Mesh Sieve

Abstract Sewage sludge was dried in a rotary drum dryer under superheated steam. Particle size and moisture content were shown to have significant influences on sticking and agglomeration of the materials. Pouring partially dried sludge (70–80% moisture content, wet basis) directly into the screw feeder of the drum dryer resulted in a significant sticking to the surface of the drum and the final particle size of the product was greater than 100 mm in diameter. The moisture content of this product was slightly less than its initial value. To overcome this issue, the sludge was mixed with lignite at variety ratios and then chopped before being introduced to the feeding screw. It was found that mixing the sludge with lignite and then sieving the chopped materials through a four millimetre mesh sieve was the key to solve this issue. This technique significantly reduced both stickiness and agglomeration of the material. Also, this enabled for a significant reduction in moisture content of the final product.

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