Abatement of n-Butane by Catalytic Combustion over Co-ZSM-5 Catalysts

Abstract

Catalytic combustion has become a promising technology to address the accelerating volatile organic compounds (VOCs) emissions. In this work, cobalt modified ZSM-5 zeolite catalysts (3−18 wt % Co) were prepared to investigate the combustion of n-butane (one typical model component of VOCs). The performances of catalysts were evaluated by conducting experiments in a flow tube reactor. XRD, BET, FT-IR, and XPS were also utilized to characterize their physicochemical properties. A significant enhancement of the catalytic activity was demonstrated in terms of the cobalt supported over ZSM-5, with an optimal cobalt loading of 7 wt %. The excellent catalytic activity of 7 wt % Co-ZSM-5 is mainly attributed to a higher concentration of active surface Co 3+ species. Furthermore, DFT calculations indicated that the role of Co can enhance the activity by decreasing the activation barriers for C−H bond cleavage. In addition, the primary reaction mechanism of n-butane combustion on Co-ZSM-5 was also revealed.

Understanding the Iron-Cobalt Synergies in ZSM-5: Enhanced Peroxymonosulfate Activation and Organic Pollutant Degradation

“… 46 , 47 Similarly, the characteristic peaks of Co 3 O 4 were also observed at 31.2, 36.8, 59.3, and 65.2° with the proportion of Co increased to 66.7%. 48 , 49 The phenomena above indicated that Fe 2 O 3 and Co 3 O 4 crystals were generated under the condition of high metal-ion loading.…”

Toward the Mechanism Study of Pd/γ-Al2O3-Assisted Bioalcohol Combustion in a Flow Reactor

“…A schematic diagram of the experimental apparatus and a description of the experimental details are shown in Figure S1, which was modified based on our previous work. ,, Detailed information on how to realize the accurate qualification of ethanol (Aladdin Chemical Reagent Co. Ltd) by a bubbling tank with the control of MKS flow meters is provided elsewhere . In addition, a flame ionization detector equipped with an HP-Plot Q capillary column (Agilent Technologies, 30 m × 320 μm × 20 μm) was adopted to quantify HCs and oxygenated compounds.…”

Enhanced Catalytic Combustion Performance of Toluene over a Novel Co–CeOx Monolith Catalyst

“…Noble metal catalysts, such as Pt, Pd, or Au, show superior oxidizing activity for toluene at a relatively low temperature. , For example, Abbasi et al prepared Pt/Al 2 O 3 –CeO 2 by the wet impregnation method and found that it can realize total oxidation of toluene at 250 °C. However, further industrial application of noble metals is greatly limited due to their high cost, easy sintering, carbon deposits, and poisoning . On the contrary, some non-noble metal catalysts have got much attention due to their high activity and thermal stability, low cost, and high resistance to H 2 O. ,− For the catalytic oxidation reaction, the formation and mobility of surface active oxygen plays a key role.…”

“…Co 3 O 4 is considered to be a typical oxidant material. It is often used in low-temperature CO oxidation, , total oxidation of VOCs, ,, deNO x , deN 2 O, , and CH 4 combustion. , The low Co–O bond strength and high activation capability of molecular oxygen play a crucial role in the catalytic oxidation process, but its catalytic oxidation ability for VOCs at low temperature and thermal stability still need to be further improved for industrial application. Therefore, it is promising to exploit a rational strategy to combine the advantages of Co 3 O 4 and CeO 2 in the oxidation reaction.…”

“…However, further industrial application of noble metals is greatly limited due to their high cost, easy sintering, carbon deposits, and poisoning. 6 On the contrary, some non-noble metal catalysts have got much attention due to their high activity and thermal stability, low cost, and high resistance to H 2 O. 4,7−9 For the catalytic oxidation reaction, the formation and mobility of surface active oxygen plays a key role.…”