Lee, Seokhyun Ha, Heon Phil Lee, Jung-Hyun Kim, Jongsik 2024-01-19T08:32:05Z 2024-01-19T08:32:05Z 2023-10-05 2023-10 0304-3894 https://pubs.kist.re.kr/handle/201004/113209 NOX rarely binds with labile oxygens of catalytic solids, whose Lewis acidic (LA) species possess higher binding strengths with NH3 (ENH3) and H2O than Bro & BULL;nsted acidic counterparts (BA --H+;-OH), oftentimes leading to elevate energy barrier (EBARRIER) and weaken H2O tolerance, respectively. These limit NH3-assisted wet NOX reduction via Langmuir-Hinshelwood-type or Eley-Rideal (ER)-type model on LA species, while leaving ER-type analogue on BA --H+ species proper to reduce wet NOX. Given hard-to-regulate strength/amount of-OH species and occasional association between ENH3 and EBARRIER, Ni1V2O6 (Ni1) was rationally chosen as a platform to isolate mono-dentate SO32-/SO42-species for use as BA --H+ bonds via protonation to increase collision frequency (k'APP,0) alongside with disclosure of advantages of SO32-/SO42--functionalized Ni1V2O6 (Ni1-S) over Ni1 in reducing wet NOX. Ni1-S outperformed Ni1 in achieving a larger BA --H+ quantity (k'APP,0 & UARR;), increasing H2O tolerance, and elevating oxygen mobility, thus promoting NOX reduction activity/consequences under SO2- excluding gases. V2O5-WO3 composite simulating a commercial catalyst could isolate mono-dentate SO32-/SO42-species and served as a control (V2O5-WO3-S) for comparison. Ni1-S was superior to V2O5-WO3-S in evading ammonium (bi-)sulfate (AS/ABS) poison accumulation and expediting AS/ABS pyrolysis efficiency, thereby improving AS/ABS resistance under SO2-including gases, while enhancing resistance against hydro-thermal aging. English Elsevier BV Uncovering the centrality of mono-dentate SO32-/SO42-modifiers grafted on a metal vanadate in accelerating wet NOX reduction and poison pyrolysis Article 10.1016/j.jhazmat.2023.132278 1 Journal of Hazardous Materials, v.460 Journal of Hazardous Materials 460 Y scie scopus 001066396600001 2-s2.0-85168491151 Engineering, Environmental Environmental Sciences Engineering Environmental Sciences & Ecology Article SELECTIVE CATALYTIC-REDUCTION ACID SITES OXIDE NH3 NH3-SCR MECHANISM VANADIUM SO2 CE STABILITY mono-dentate SO32-/SO42-functionality Nickel vanadate Ammonium (bi-)sulfate NOX reduction