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Efficient Removal of Phosphides from Yellow Phosphorus
Tail Gas Using Phosphate Rock Powder as a Dephosphorization Agent
Cai-Hong Zhang (25147304)
Yin-Tao Wang (25147307)
Li Liu (75607)
Ruo Wu (14632577)
De-Long Xie (25147310)
Yuan-Zhi Zhu (25147313)
Yi Mei (4921822)
Yun-Xiang Nie (25147316)
Microbiology
Physiology
Environmental Sciences not elsewhere classified
Chemical Sciences not elsewhere classified
Ecology
Biological Sciences not elsewhere classified
Cancer
Plant Biology
quality fuel resource
phosphoric acid produced
phosphate products formed
25 %, enabling
reactivity tests reveal
phosphate rock powder
dephosphorization active components
4 </ sub
3 </ sub
10 </ sub
tail gas combustion
reactivity decreasing
system achieved
phosphorus content
fired boilers
efficient removal
efficient dephosphorization
dephosphorization efficiency
Yellow
phosphorus tail gas, containing over 90% CO gas, serves
as a high-quality fuel resource. Nevertheless, the phosphoric acid
produced by the combustion of PH<sub>3</sub> can corrode the gas-fired
boilers. Herein, we propose an in situ dephosphorization strategy
using fluidized phosphate rock powder as an absorbent during tail
gas combustion. In an industrial fluidized bed boiler, PH<sub>3</sub> is oxidized to P<sub>4</sub>O<sub>10</sub> and H<sub>3</sub>PO<sub>4</sub>, which are captured by the powder. The system achieved over
99.8% dephosphorization efficiency, and the phosphorus content at
the outlet was less than 5 mg/m<sup>3</sup>. Meanwhile, the phosphorus
content of phosphate rock powder increases by 5.25%, enabling its
reuse as a yellow phosphorus production feedstock. Characterization
and reactivity tests reveal that dephosphorization active components
are CaMg(CO<sub>3</sub>)<sub>2</sub>, KAl<sub>2</sub>(Si<sub>3</sub>AlO<sub>10</sub>)(OH)<sub>2</sub>, Ca<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>F, and SiO<sub>2</sub>, with reactivity decreasing in that
order. In addition, the phosphate products formed after dephosphorization
were identified. This work provides certain theoretical guidance for
the efficient dephosphorization of the phosphate rock powder.
2026-09-30T00:00:00Z
Text
Journal contribution
10.1021/acs.iecr.6c02861.s001
https://figshare.com/articles/journal_contribution/Efficient_Removal_of_Phosphides_from_Yellow_Phosphorus_Tail_Gas_Using_Phosphate_Rock_Powder_as_a_Dephosphorization_Agent/34037492
CC BY-NC 4.0