The thermal dehydration, decomposition and kinetics of Mn(NO3)2 · 6H2O and its deuterated analogue

Maneva, M.; Petroff, N.

doi:10.1007/bf01913648

Cited by 20 publications

(5 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1) Decompose the Triton-X45 2) Decompose the Mn(NO 3 ) x into MnO x . 29 In addition to this the KNO 3 would melt during the heat treatment (mp(KNO 3 ) = 334 • C 30 ), and for this reason probably redistribute in the electrode. The impregnation procedure just described was repeated twice for both the KNO 3 and the Mn(NO 3 ) x impregnation.…”

Section: Methodsmentioning

confidence: 99%

Improvement of LSM15-CGO10 Electrodes for Electrochemical Removal of NOx by KNO3 and MnOx Impregnation

Traulsen¹

2011

J. Electrochem. Soc.

View full text Add to dashboard Cite

LSM15-CGO10 (La0.85Sr0.15MnO3-Ce0.90Gd0.1O1.95) electrodes were impregnated with either KNO3 or MnOx, and the effect of the impregnations on the activity in NO containing atmospheres was investigated by electrochemical impedance spectroscopy and cyclic voltammetry. The electrodes were tested in 1000 ppm NO, 10% O2 and 1000 ppm NO + 10% O2 in the temperature range 300–500°C and the electrodes were investigated by scanning electron microscopy before and after testing. At 400–450°C a NOx-storage process was observed on the KNO3-impregnated electrodes, this process appeared to be dependent on preceding catalytically formation of NO2. Despite a marked difference in the microstructure of the impregnated KNO3 and MnOx, both impregnations caused a significant reduction in the polarization resistance of the electrodes, due to a general decrease in resistance of all the identified electrode processes. The effect of the impregnation was strongest at low temperatures, likely because the microstructure of the impregnated compounds changed at higher temperatures. Scanning electron microscopy images revealed a significant change in the microstructure of the impregnated samples after the test.

show abstract

Section: Methodsmentioning

confidence: 99%

Improvement of LSM15-CGO10 Electrodes for Electrochemical Removal of NOx by KNO3 and MnOx Impregnation

Traulsen¹

2011

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…However, their actual form is not exactly known. The thermal degradation of metal nitrates in inert atmosphere has been broadly studied in the literature [25][26][27][28][29][30][31] and it was found that nitrates were removed as NO x between 150 and 300 • C. Similarly to the thermal decomposition of nitrocellulose -cellulose doped with nitric acid -it might be assumed that those NO x are mainly NO 2 [32]. Since carbon-based materials are efficient adsorbents [33], the extra-nitrogen measured in chars might therefore originate from the partial adsorption of NO 2 on the carbonaceous material [34] ( Table 3).…”

Section: Expression Of Product Yields On a "Catalyst-free Basis"mentioning

confidence: 99%

“…It was not possible to determine the oxidation states of metals such as cerium, manganese, iron and cobalt in chars. However, regarding others works on the thermal degradation of metal nitrate salts in oxygen-free atmospheres, it might be considered that nanoparticles of CeO 2 [25], MnO 2 [31], Fe 2 O 3 [30] and Co 3 O 4 [27] were formed in chars. However, possible reduction of those oxides by chars was likely.…”

Section: Metal Oxidation Statementioning

confidence: 99%

Catalytic effect of metal nitrate salts during pyrolysis of impregnated biomass

Eibner

Broust

Blin

et al. 2015

Journal of Analytical and Applied Pyrolysis

View full text Add to dashboard Cite

b s t r a c tCatalytic pyrolysis is a promising way to improve bio-oil product quality. In this study, metal salts were directly impregnated in biomass to generate in situ catalysts and investigate their impact on pyrolysis products. Seven metals -Ce, Mn, Fe, Co, Ni, Cu and Zn -were selected and impregnated in eucalyptus using nitrate salts. A fixed-bed reactor, pre-heated at 500• C and inerted with N 2 flow, was used for pyrolysis. Both gas and bio-oil compositions were analysed, paying particular attention to the production of anhydrosugars. The anhydrosugar yields were found to be strongly influenced by the presence of metal salt catalysts. In particular, both Zn and Co salts yielded more anhydrosugars in comparison with catalyst-free sample. Moreover, LAC (1-hydroxy-(1R)-3,6-dioxabicyclo[3.2.1]octan-2-one) was produced in higher amounts than levoglucosan which is commonly produced without any catalyst. Metals were found to remain in all chars and tended to form metal-based nanoparticles (e.g. Cu 0 , Ni 0 , ZnO) able to act as in situ catalysts during the pyrolysis process. It seems that those metal nanoparticles are closely related to LAC production. In parallel to metal cations, nitrates were also suspected to play a significant role during pyrolysis. The suspected impact of anions on levoglucosenone production is discussed. Concerning gas yields, the impregnated nitrate salts were found to strongly affect CO 2 production.

show abstract

“…Then, after adding cerium to manganese oxide, the specific surface area just decreased a little, which would be more obvious with developing the cerium amount. Considering the fact that the decomposition temperature of Mn(NO 3 ) 2 (<200 °C) is slightly lower than that of Ce(NO 3 ) 3 (>200 °C), , the later formation of CeO 2 nanoparticles might block the porous structure of Mn 2 O 3 accordingly while the surface area would be reduced. However, the specific surface areas of these samples are still much larger than that of Mn 2 O 3 -H, which lacks an obvious pore structure.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Hierarchical Porous Metal Oxides by the HPMC-Assisted Gel Combustion Strategy: Incorporation of Nanoceria into Cookie-like Mn₂O₃ with Enhanced Oxidation Activity and Excellent Water Resistance

Cao

Zhang

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Constructing nonprecious metal oxide catalysts with a hierarchical porous structure by a simple method for the deep catalytic oxidation of toxic volatile organic compounds at low temperatures is of great value and significance. In this work, a porous manganese trioxide catalyst (Mn 2 O 3 -H) was prepared by a hydroxypropyl methylcellulose-assisted combustion synthesis strategy for catalytic complete oxidation of gaseous toluene. Benefiting from the rich porous nanostructure, Mn 2 O 3 -H has much higher specific surface area and active site density, resulting in better low-temperature reducibility and oxygen activation ability than blank Mn 2 O 3 formed by direct calcination. With this sol−gel combustion process, CeO 2 nanoparticles could be successfully introduced to form cookie-like Ce−Mn composite oxide with a hierarchical porous nanostructure, which builds the strong interaction of CeO 2 − Mn 2 O 3 to weaken Mn−O with more active defects. Among Ce-doped catalysts, 5% CeMn-H shows the best catalytic activity in toluene oxidation with 90% conversion temperature at 242 °C under a weight hour space velocity of 60,000 mL•g −1 •h −1 , which is about 30 and 133 °C lower than that of Mn 2 O 3 -H and Mn 2 O 3 -B, respectively. This advantage is also shown in other typical hydrocarbons such as propylene and propane. Moreover, the as-prepared Ce-doped catalyst exhibits excellent stability and water resistance ability. This simple robust sol−gel combustion method will provide valuable enlightenment for designing porous catalysts with high performance for related catalytic reactions.

show abstract

The thermal dehydration, decomposition and kinetics of Mn(NO3)2 · 6H2O and its deuterated analogue

Cited by 20 publications

References 9 publications

Improvement of LSM15-CGO10 Electrodes for Electrochemical Removal of NOx by KNO3 and MnOx Impregnation

Improvement of LSM15-CGO10 Electrodes for Electrochemical Removal of NOx by KNO3 and MnOx Impregnation

Catalytic effect of metal nitrate salts during pyrolysis of impregnated biomass

Fabrication of Hierarchical Porous Metal Oxides by the HPMC-Assisted Gel Combustion Strategy: Incorporation of Nanoceria into Cookie-like Mn₂O₃ with Enhanced Oxidation Activity and Excellent Water Resistance

Contact Info

Product

Resources

About

The thermal dehydration, decomposition and kinetics of Mn(NO3)2 · 6H2O and its deuterated analogue

Cited by 20 publications

References 9 publications

Improvement of LSM15-CGO10 Electrodes for Electrochemical Removal of NOx by KNO3 and MnOx Impregnation

Improvement of LSM15-CGO10 Electrodes for Electrochemical Removal of NOx by KNO3 and MnOx Impregnation

Catalytic effect of metal nitrate salts during pyrolysis of impregnated biomass

Fabrication of Hierarchical Porous Metal Oxides by the HPMC-Assisted Gel Combustion Strategy: Incorporation of Nanoceria into Cookie-like Mn2O3 with Enhanced Oxidation Activity and Excellent Water Resistance

Contact Info

Product

Resources

About

Fabrication of Hierarchical Porous Metal Oxides by the HPMC-Assisted Gel Combustion Strategy: Incorporation of Nanoceria into Cookie-like Mn₂O₃ with Enhanced Oxidation Activity and Excellent Water Resistance