Mechanistic study of 1,1-dimethylhydrazine transformation over Pt/SiO2 catalyst

Andrei V. Smirnov; Pavel A. Kots; Maksim A. Panteleyev; Irina I. Ivanova

doi:10.1039/c8ra07769j

Mechanistic study of 1,1-dimethylhydrazine transformation over Pt/SiO₂ catalyst

Andrei V. Smirnov, Pavel A. Kots, Maksim A. Panteleyev, Irina I. Ivanova

Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Catalytic oxidation of 1,1-dimethylhydrazine (UDMH) with molecular oxygen over Pt/SiO₂ was studied by in situ FTIR spectroscopy coupled with online MS monitoring of the gas phase. An unusual two-step oxidation process was detected in experiments with the pulse UDMH feeding: initial UDMH oxidation over a fresh platinum surface quickly terminates due to the blockage of active sites; a time-separated second oxidation step corresponds to combustion of the surface residue. This residue consists of CN nitrile groups formed via decomposition of the products of non-oxidative UDMH conversion, such as dimethylamine. The two-step oxidation picture is observed over a broad range of reaction temperatures and oxygen to UDMH ratios.

Original language	English (US)
Pages (from-to)	36970-36979
Number of pages	10
Journal	RSC Advances
Volume	8
Issue number	64
DOIs	https://doi.org/10.1039/c8ra07769j
State	Published - 2018

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering

Access to Document

10.1039/c8ra07769j

Cite this

@article{8a48eccecf3f4aedacdba128e63ef162,

title = "Mechanistic study of 1,1-dimethylhydrazine transformation over Pt/SiO2 catalyst",

abstract = "Catalytic oxidation of 1,1-dimethylhydrazine (UDMH) with molecular oxygen over Pt/SiO2 was studied by in situ FTIR spectroscopy coupled with online MS monitoring of the gas phase. An unusual two-step oxidation process was detected in experiments with the pulse UDMH feeding: initial UDMH oxidation over a fresh platinum surface quickly terminates due to the blockage of active sites; a time-separated second oxidation step corresponds to combustion of the surface residue. This residue consists of CN nitrile groups formed via decomposition of the products of non-oxidative UDMH conversion, such as dimethylamine. The two-step oxidation picture is observed over a broad range of reaction temperatures and oxygen to UDMH ratios.",

author = "Smirnov, {Andrei V.} and Kots, {Pavel A.} and Panteleyev, {Maksim A.} and Ivanova, {Irina I.}",

note = "Publisher Copyright: {\textcopyright} The Royal Society of Chemistry.",

year = "2018",

doi = "10.1039/c8ra07769j",

language = "English (US)",

volume = "8",

pages = "36970--36979",

journal = "RSC Advances",

issn = "2046-2069",

publisher = "Royal Society of Chemistry",

number = "64",

}

TY - JOUR

T1 - Mechanistic study of 1,1-dimethylhydrazine transformation over Pt/SiO2 catalyst

AU - Smirnov, Andrei V.

AU - Kots, Pavel A.

AU - Panteleyev, Maksim A.

AU - Ivanova, Irina I.

N1 - Publisher Copyright: © The Royal Society of Chemistry.

PY - 2018

Y1 - 2018

N2 - Catalytic oxidation of 1,1-dimethylhydrazine (UDMH) with molecular oxygen over Pt/SiO2 was studied by in situ FTIR spectroscopy coupled with online MS monitoring of the gas phase. An unusual two-step oxidation process was detected in experiments with the pulse UDMH feeding: initial UDMH oxidation over a fresh platinum surface quickly terminates due to the blockage of active sites; a time-separated second oxidation step corresponds to combustion of the surface residue. This residue consists of CN nitrile groups formed via decomposition of the products of non-oxidative UDMH conversion, such as dimethylamine. The two-step oxidation picture is observed over a broad range of reaction temperatures and oxygen to UDMH ratios.

AB - Catalytic oxidation of 1,1-dimethylhydrazine (UDMH) with molecular oxygen over Pt/SiO2 was studied by in situ FTIR spectroscopy coupled with online MS monitoring of the gas phase. An unusual two-step oxidation process was detected in experiments with the pulse UDMH feeding: initial UDMH oxidation over a fresh platinum surface quickly terminates due to the blockage of active sites; a time-separated second oxidation step corresponds to combustion of the surface residue. This residue consists of CN nitrile groups formed via decomposition of the products of non-oxidative UDMH conversion, such as dimethylamine. The two-step oxidation picture is observed over a broad range of reaction temperatures and oxygen to UDMH ratios.

UR - http://www.scopus.com/inward/record.url?scp=85056421958&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85056421958&partnerID=8YFLogxK

U2 - 10.1039/c8ra07769j

DO - 10.1039/c8ra07769j

M3 - Article

AN - SCOPUS:85056421958

SN - 2046-2069

VL - 8

SP - 36970

EP - 36979

JO - RSC Advances

JF - RSC Advances

IS - 64

ER -

Mechanistic study of 1,1-dimethylhydrazine transformation over Pt/SiO₂ catalyst

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this