Formation of Hydrogen Cyanide and Ammonia during the Gasification of Sewage Sludge and Bituminous Coal

2005 ◽  
Vol 19 (3) ◽  
pp. 1016-1022 ◽  
Author(s):  
N. Paterson ◽  
Y. Zhuo ◽  
D. Dugwell ◽  
R. Kandiyoti
Keyword(s):  
Sewage Sludge ◽  
Hydrogen Cyanide ◽  
Bituminous Coal

Pyrolysis of blends of different types of sewage sludge with one bituminous coal

Energy ◽  
2005 ◽  
Vol 30 (7) ◽  
pp. 1079-1091 ◽  
Author(s):  
M. Belén Folgueras ◽  
R. María Díaz ◽  
Jorge Xiberta
Keyword(s):  
Sewage Sludge ◽  
Bituminous Coal ◽  
Different Types

Experimental investigation on co-combustion kinetics and gas emission law of sewage sludge-bituminous coal

2018 ◽  
Vol 42 (13) ◽  
pp. 4097-4107 ◽  
Author(s):  
Yaode Li ◽  
Dong Yang ◽  
Mofeng Qu ◽  
Lihui Suo ◽  
Wenbo Sun
Keyword(s):  
Experimental Investigation ◽  
Sewage Sludge ◽  
Bituminous Coal ◽  
Combustion Kinetics ◽  
Gas Emission

The Study of Partitioning of Heavy Metals During Fluidized Bed Combustion of Sewage Sludge and Coal

2005 ◽  
Vol 128 (2) ◽  
pp. 104-110 ◽  
Author(s):  
I. Gulyurtlu ◽  
M. Helena Lopes ◽  
P. Abelha ◽  
I. Cabrita ◽  
J. F. Santos Oliveira
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Fluidized Bed ◽  
Bituminous Coal ◽  
Fluidized Bed Combustion ◽  
Sulphur Compounds ◽  
Legal Limits ◽  
Higher Temperature ◽  
Combustion Tests ◽  
Fluidized Bed Combustor

The behavior of Cd, Cr, Cu, Co, Mn, Ni, Pb, Zn, and Hg during the combustion tests of a dry granular sewage sludge on a fluidized bed combustor pilot (FBC) of about 0.3 MW was evaluated. The emissions of these heavy metals from mono-combustion were compared with those of co-combustion of the sludge with a bituminous coal. The effect of the addition of limestone was also studied in order to retain sulphur compounds and to verify its influence on the retention of heavy metals (HM). Heavy metals were collected and analyzed from different locations of the installation, which included the stack, the two cyclones, and the material removed from the bed. The results showed that the volatility of metals was rather low, resulting in emissions below the legal limits of the new directive on incineration, with the exception of Hg during the mono-combustion tests. The partitioning of metals, except for Hg, appeared to follow that of ashes, amounting to levels above 90% in the bed streams in the mono-combustion case. For co-combustion, there was a lower fixation of HM in the bed ashes, mostly originating essentially from the sewage sludge, ranging between 40% and 80%. It is believed that in this latter case, a slightly higher temperature could have enhanced the volatilization, especially of Cd and Pb. However these metals were then retained in fly ashes captured in the cyclones. In the case of Hg, the volatilisation was complete. The bed ashes were free of Hg and part of Hg was retained in the cyclones and the rest was emitted either with fine ash particles or in gaseous forms. In mono-combustion the Hg emissions from the stack (particles and gas) accounted for about 50%, although there was a significant amount unaccounted for. This appeared to have significantly decreased in the case of co-combustion, as only about 15% has been emitted, due to the retention effect of cyclone ashes which presented high quantities of unburned matter, calcium and sulphur.

SO2 Emission from Municipal Sewage Sludge Cocombustion with Bituminous Coal Under O2/CO2 Atmosphere Versus O2/N2 Atmosphere

2013 ◽  
Vol 27 (11) ◽  
pp. 7067-7071 ◽  
Author(s):  
Cong Shengquan ◽  
Duan Feng ◽  
Zhang Yousong ◽  
Liu Jian ◽  
Zhang Jinpeng ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Bituminous Coal ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
So2 Emission ◽  
N2 Atmosphere ◽  
Co2 Atmosphere

The Study of Partitioning of Heavy Metals During Fluidized Bed Combustion of Sewage Sludge and Coal

2003 ◽  
Author(s):  
I. Gulyurtlu ◽  
M. Helena Lopes ◽  
P. Abelha ◽  
I. Cabrita ◽  
J. F. Santos Oliveira
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Bituminous Coal ◽  
Unburned Carbon ◽  
Fluidized Bed Combustion ◽  
Sulphur Compounds ◽  
Legal Limits ◽  
Bed Temperature ◽  
Combustion Tests ◽  
Sulphur Species

The behaviour of Cd, Cr, Cu, Co, Mn, Ni, Pb, Zn and Hg during the combustion tests of granular dry sewage sludges on a pilot FBC of about 0,3 MW was evaluated. The emissions of these heavy metals from mono-combustion were compared with those of co-combustion of the sludge with a bituminous coal. The effect of the addition of limestone was also studied in order to retain sulphur compounds and to verify its influence on the retention of heavy metals. Heavy metals were collected and analysed from different locations of the installation, which included the stack, the two cyclones and the material removed from the bed. The results showed that the volatility of metals was rather low, resulting in emissions below the legal limits of the new directive on incineration, with the exception of Hg during the mono-combustion tests. The partitioning of metals, except for Hg, appeared to follow that of ashes, amounting to levels above 90% in the bed streams in the mono-combustion case. For co-combustion, there was a lower fixation of HM in the bed ashes, mostly originating essentially from the sewage sludge, ranging between 40 and 80%. It is believed that in this latter case, a slightly higher bed temperature could have enhanced the volatilisation, especially of Cd and Pb. However these metals were then retained in cyclone ashes. In the case of Hg, the volatilisation was complete. The bed ashes were free of Hg and part of it was retained in the cyclone and emitted as both fine ash particles and in gaseous forms. In mono-combustion the Hg emissions from the stack (particles and gas) accounted for about 50%, although there was a significant amount unaccounted for. This appeared to have significantly decreased in the case of co-combustion, as only about 15% has been emitted, due to the retention effect of cyclone ashes which presented high quantities of unburned carbon and possibly condensed sulphur species.

Sign in / Sign up

Export Citation Format

Share Document