Research into the reaction process and the effect of reaction conditions on the simultaneous removal of H2S, COS and CS2 at low temperature

Supported 3wt%Pd/α-Al₂O₃ catalyst was tested in selective oxidation of 1,2-propanediol by molecular oxygen. It was found that the catalyst is active in an alkaline water solution. Lactic acid was obtained as the main product of the reaction. Influence of different reaction conditions on 1,2-PDO conversion and oxidation process selectivity was studied. Partial kinetic orders of the reaction with respect to 1,2-propanediol, c0(NaOH), p(O2), n(1,2-PDO)/n(Pd)) were determined and an experimental kinetic model of the catalytic oxidation reaction was obtained. Activation energy of the process was calculated and was found to be about 53 ± 5 kJ/mol.

Download Full-text

The Hydrolysis of Carbonyl Sulfide at Low Temperature: A Review

The Scientific World JOURNAL ◽

10.1155/2013/739501 ◽

2013 ◽

Vol 2013 ◽

pp. 1-8 ◽

Cited By ~ 12

Author(s):

Shunzheng Zhao ◽

Honghong Yi ◽

Xiaolong Tang ◽

Shanxue Jiang ◽

Fengyu Gao ◽

...

Keyword(s):

Low Temperature ◽

Metal Oxides ◽

Transition Metal Oxides ◽

Carbonyl Sulfide ◽

Earth Metal ◽

Catalytic Hydrolysis ◽

Reaction Conditions ◽

Cos Hydrolysis ◽

Reaction Atmosphere ◽

Hydrolysis Of

Catalytic hydrolysis technology of carbonyl sulfide (COS) at low temperature was reviewed, including the development of catalysts, reaction kinetics, and reaction mechanism of COS hydrolysis. It was indicated that the catalysts are mainly involved metal oxide and activated carbon. The active ingredients which can load on COS hydrolysis catalyst include alkali metal, alkaline earth metal, transition metal oxides, rare earth metal oxides, mixed metal oxides, and nanometal oxides. The catalytic hydrolysis of COS is a first-order reaction with respect to carbonyl sulfide, while the reaction order of water changes as the reaction conditions change. The controlling steps are also different because the reaction conditions such as concentration of carbonyl sulfide, reaction temperature, water-air ratio, and reaction atmosphere are different. The hydrolysis of carbonyl sulfide is base-catalyzed reaction, and the force of the base site has an important effect on the hydrolysis of carbonyl sulfide.

Download Full-text

Research on reaction conditions and mechanism for simultaneous removal of NO and Hg0 over Cu Fe modified activated carbon at low temperature

Journal of the Energy Institute ◽

10.1016/j.joei.2019.04.006 ◽

2020 ◽

Vol 93 (1) ◽

pp. 87-98

Author(s):

Xin Sun ◽

Lina Sun ◽

Ye Liu ◽

Kai Li ◽

Chi Wang ◽

...

Keyword(s):

Activated Carbon ◽

Low Temperature ◽

Simultaneous Removal ◽

Reaction Conditions ◽

Modified Activated Carbon

Download Full-text

Recent Advances in the Catalytic Treatment of Volatile Organic Compounds: A Review Based on the Mixture Effect

Catalysts ◽

10.3390/catal11101218 ◽

2021 ◽

Vol 11 (10) ◽

pp. 1218

Author(s):

Guillaume Rochard ◽

Lilian Olivet ◽

Mariebelle Tannous ◽

Christophe Poupin ◽

Stéphane Siffert ◽

...

Keyword(s):

Catalytic Oxidation ◽

Organic Compounds ◽

Oxidation Reaction ◽

Individual Component ◽

Industrial Processes ◽

Reaction Conditions ◽

Total Oxidation ◽

Catalytic Material ◽

Volatile Organic ◽

Catalytic Treatment

Catalytic total oxidation is an efficient technique for treating VOCs, which are mainly emitted by solvent-based industrial processes. However, studies of the catalytic oxidation of VOCs in combination with other pollutants are very limited, despite the fact that this is a key step of knowledge before industrial application. During the oxidation reaction, the behavior of a molecule may change depending on the reaction mixture. For the treatment of an effluent loaded with VOCs, it is necessary to carefully select not only the catalytic material to be used but also the reaction conditions. Indeed, the catalytic oxidation of a component in a VOCs mixture is not predicted solely from the behavior of individual component. Thus, the objective of this small review is to carry out a study on the effect observed in the case of the oxidation of a VOCs mixture or in the presence of water, NOX or sulfur compounds.

Download Full-text

Dynamics of low temperature N2O formation under SCR reaction conditions over a Cu-SSZ-13 catalyst

Applied Catalysis B Environmental ◽

10.1016/j.apcatb.2021.120245 ◽

2021 ◽

pp. 120245

Author(s):

Yuanzhou Xi ◽

Nathan A. Ottinger ◽

Christopher J. Keturakis ◽

Z. Gerald Liu

Keyword(s):

Low Temperature ◽

Reaction Conditions ◽

N2o Formation

Download Full-text

Enhanced catalytic activity for simultaneous removal of PCDD/Fs and NO over carbon nanotubes modified MnOx-CeO2/TiO2 catalyst at low temperature

Waste Disposal & Sustainable Energy ◽

10.1007/s42768-020-00064-7 ◽

2021 ◽

Vol 3 (1) ◽

pp. 63-71

Author(s):

Qiulin Wang ◽

Zhuping Jiang ◽

Jianjian Zhou ◽

Jin Jing

Keyword(s):

Carbon Nanotubes ◽

Catalytic Activity ◽

Low Temperature ◽

Simultaneous Removal ◽

Tio2 Catalyst

Download Full-text

On Microfaceting Instability of Pt(110) Under Catalytic Oxidation of Adsorbed Co

MRS Proceedings ◽

10.1557/proc-263-233 ◽

1992 ◽

Vol 263 ◽

Author(s):

M. Papoular

Keyword(s):

Catalytic Oxidation ◽

Oxidation Reaction ◽

Nucleation And Growth ◽

Point Of View ◽

Momentum Balance ◽

Layer By Layer ◽

Adsorption Of Co ◽

Specific Temperature ◽

Energy And Momentum ◽

Sawtooth Profile

ABSTRACTAs demonstrated by recent STM [1] and LEED [2] experiments the platinum (110) surface undergoes, at carbon monoxide submonolayer coverages, a phase transition from the 1 x 2 “missing-row” (reconstructed) state to the 1 x 1(bulk-like) state under specific temperature and partial-pressure conditions. The catalytic oxidation reaction CO + 1/2 → CO2 drives a microfaceting instability [3] [4] of the Pt(110) surface which ends up in a regular sawtooth profile with a period ≈ 200 Å, along the [110] direction.We introduce the idea that the rather extensive Pt mass transport, as involved in the process, could be energetically assisted by the reaction itself. Energy and momentum-balance considerations lead us to expect an energy ≲ 0.5 eV to be transferrable to thesubstrate. This should efficiently contribute to initiating the “scraping”process that leads to the microfaceted pattern.A simple model for nucleation and growth of facets is presented (see ref. 5), yielding characteristic times of order minutes (at T = 500 K), in fair agreement with experiment.Independently of the structural/catalytic problem, adsorption of CO at submonolayer coverages on, e.g., Pt(110) might be of interest from a surfactantphysics point of view (see ref. 6 for a very recent study on layer-by-layer homoepitaxial metal growth).

Download Full-text