1 research outputs found
<i>In Situ</i> Reforming of the Volatile by Char during Sewage Sludge Pyrolysis
In
this study, the volatile from sewage sludge (SS) pyrolysis is passed
through the hot char from the same source in a fixed bed reactor.
The reforming effect of the sewage sludge char (SSC) on the quality
and energy distribution of liquid and gas products is studied. In
comparison to dolomite, SSC presents a better tar-eliminating effect
from 450 to 650 °C. The production of combustible products, including
CH<sub>4</sub>, H<sub>2</sub>, and CO, is significantly increased
by both the catalytic cracking on the SSC surface and the volatile–char
reaction. After the reforming effect at the pyrolysis temperature
of 650 °C, the gas yield is increased from 17.19 to 34.27 wt
% and the fraction of combustible components is increased by 54.28
vol %. The quality of the oil is also upgraded by reforming of SSC,
with the escalation of the light components, and nitrogen-containing
and oxygenated fractions are greatly reduced. When the pyrolysis temperature
is fixed at 650 °C and the reforming temperature is increased
from 450 to 650 °C, the liquid yield is decreased from 18.76
to 10.67 wt %. In addition, the combustible fraction in the gaseous
product is greatly increased. The calculation of the energy distribution
indicates that, via the reforming process, a lot more heating value
will concentrate on the gas product and the overall high heat value
of the pyrolysis volatile and SSC will be significantly promoted