Combustion of Low-Concentration Coal Bed Methane in a Fluidized Bed

2011 ◽  
Vol 25 (3) ◽  
pp. 975-980 ◽  
Author(s):  
Zhongqing Yang ◽  
John R. Grace ◽  
C. Jim Lim ◽  
Li Zhang
Keyword(s):  
Fluidized Bed ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Low Concentration

Anaerobic treatment of low concentration waste water in an inverse fluidized bed reactor

2000 ◽  
Vol 41 (4-5) ◽  
pp. 245-251 ◽  
Author(s):  
P. Castilla ◽  
M. Meraz ◽  
O. Monroy ◽  
A. Noyola
Keyword(s):  
Fluidized Bed ◽  
Removal Efficiency ◽  
Suspended Solids ◽  
Municipal Wastewater ◽  
Specific Activity ◽  
Biomass Concentration ◽  
Fluidized Bed Reactor ◽  
Anaerobic Treatment ◽  
Low Concentration ◽  
Inverse Fluidized Bed

Low concentration synthetic and municipal wastewaters were treated at HRT as short as 3 and 0.6 h respectively in an anaerobic inverse fluidized bed. Both bioreactors showed gas hold up due to the liquid downflow pattern of the prototype. The bioreactor operated at 3 h had a removal efficiency of 83%, specific activity of 4.5 kg CODremoved/kg IVS (d and the gas hold up varied from 23 to 55%. The reactor treating municipal wastewater had a removal efficiency of 44% when operating at 0.6 h, the specific activity was 4.2 kg CODremoved/kg IVS (d and no biogas was detected apparently because an important fraction was dissolved in the liquid phase. The biomass concentration was 13.8 and 1.1 kg IVS/m3 for synthetic and municipal wastewater and the SEM microphotographs showed a bacterial diversity for the first run and only cocci cells for the second run. The system does not remove suspended solids, so a polishing postreatment to improve water quality has to be implemented.

A New Safety Enrichment Method for Low Concentration Coal Bed Methane-Proportion Pressure Swing Adsorption

2011 ◽  
Vol 233-235 ◽  
pp. 2276-2280 ◽  
Author(s):  
Yong Ling Li ◽  
Ying Shu Liu ◽  
Xiong Yang
Keyword(s):  
Pressure Swing Adsorption ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Carbon Molecular Sieve ◽  
Enrichment Method ◽  
Adsorption Characteristic ◽  
Low Concentration ◽  
Explosion Limit ◽  
Pressure Swing ◽  
Enrichment Process

Based on pressure swing adsorption, Proportion Pressure Swing Adsorption (PPSA), a new enrichment method with high safety, was suggested to enrich the low concentration coal bed gas. A mixture of active carbon (CA) and carbon molecular sieve (CMS) was employed as adsorbent in the process of PPSA. The methane and oxygen in coal bed gas were adsorbed simultaneously. The experimental study was carried out in order to verify the feasibility of this method. The equilibrium adsorption characteristic of CA and CMS were tested. The results showed that both concentrations of CH4 and O2 in desorption gas could be controlled well and would not exceed the explosion limit in enrichment process by adjusting the mass ratio of CMS5/AC1. Therefore, the new method, PPSA, can guarantee the safety in enrichment of coal bed methane.

Investigation of low concentration methane combustion in a fluidized bed with Pd/Al2O3as catalytic particles

RSC Advances ◽  
2014 ◽  
Vol 4 (103) ◽  
pp. 59418-59426 ◽  
Author(s):  
Zhongqing Yang ◽  
Peng Yang ◽  
Li Zhang ◽  
Mingnv Guo ◽  
Yunfei Yan
Keyword(s):  
Fluidized Bed ◽  
Methane Combustion ◽  
Low Concentration ◽  
Catalytic Particles

The effect of low-concentration oxygen in sweep gas during pyrolysis of red oak using a fluidized bed reactor

Fuel ◽  
2014 ◽  
Vol 124 ◽  
pp. 49-56 ◽  
Author(s):  
Kwang Ho Kim ◽  
Xianglan Bai ◽  
Marjorie Rover ◽  
Robert C. Brown
Keyword(s):  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Red Oak ◽  
Low Concentration

Direct Operation of Solid Oxide Fuel Cells on Low-Concentration Oxygen-Bearing Coal-Bed Methane with High Stability

2018 ◽  
Vol 32 (4) ◽  
pp. 4547-4558 ◽  
Author(s):  
Yong Jiao ◽  
Liyang Wang ◽  
Liqin Zhang ◽  
Wenting An ◽  
Wei Wang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
High Stability ◽  
Solid Oxide ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Oxide Fuel ◽  
Low Concentration ◽  
Direct Operation
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