Piperazine Degradation in Pilot Plants

Degradation study of piperazine, its blends and structural analogs for CO2 capture: A review

“…Copyright (2014) American Chemical Society. Nielsen et al (2013) found a low concentration of 0.09 mol/kg of MNPZ in SRP campaigns using a synthetic flue gas stream without additional concentration of NOx. The formation of MNPZ under this condition was speculated to take place due to the oxidation of PZ.…”

“…Some identified oxidation products are listed in Table 2. Nielsen et al (2013) studied degradation of PZ in two pilot plants: Separation Research Program (SRP) and Pilot Plant 2 (PP2). The former used highly oxygenated synthetic flue gas containing ambient level NOx, while the latter used a slipstream of real flue gas taken from a coal-fired power plant.…”

“…1.5 m PZ was observed to degrade by up to 1.30 × 10 −4 millimoles per kilogram per second (mmol/(kg s)) in 912 hours at 80 • C and 3.33 × 10 −4 mmol/(kg s) in 456 hours at 100 • C. Oxidation of PZ followed first order and estimated rate constants were found to be as 1.0 × 10 −7 s −1 and 3.3 × 10 −7 s −1 degraded at 80 and 100 • C respectively. Nielsen et al (2013) investigated degradation of PZ in two pilot plants: SRP and PP2, under conditions described previously in Section 2. PZ seemed to oxidize more in PP2 compared to SRP due to the composition of flue gas used.…”

Practical experience in post-combustion CO2 capture using reactive solvents in large pilot and demonstration plants

“…The IC based technique was also used to quantify PZ degradation in pilot plant (Nielsen et al, 2013).…”

Nitrosamines and nitramines in Carbon Capture plants

“…Carbon capture pilot plant at the Maasvlakte coal power plant in Netherlands. (Kolderup et al, 2012, Khakharia, 2015 Absorber outlet: Pilot plant at the Pickle research Campus in Austin, Texas (USA) and Pilot Plant2 (PP2) (Nielsen et al, 2013) In the solvent: MNPZ 10; 140 (PP2) mg/kg MNPZ max. 325 mg/kg DEA 12.7; 9.33 (PP2) mmol/kg PZ nitrates 0.14; 4.82 (PP2) mmol/kg Synthetic flue gas, 12% CO 2 at the inlet, 8m PZ as a solvent.…”