Influence of pore characteristic on mechanical strength of coal-based
activated coke
Abstract
Through the correlation study between the abrasive resistance,
compressive strength and pore characteristics indexes of coal-based
activated coke (AC) for desulfurization and denitration, the effect of
pore structure on mechanical strength of AC was clarified. The results
show that the open pore is the main pore type that reduces the
compressive strength. The open pore with diameter between 2 and 500 nm
have the most serious damage to the compressive strength. The opening
and closing state of the pore has no obvious effect on the abrasive
resistance. The pores with diameter between 0 and 2 nm have the most
serious damage to the abrasive resistance. With the increase of the
number of recycling times, the AC pore structure further developed, and
the compressive strength and abrasion resistance both decreases
correspondingly. After recycled in the flue gas purification facility,
AC average compressive strength reduces from 499 N to 340 N, while the
abrasion resistance increases from 97.18% to 98.88% because its
surface is smoothed during recycling.