A green and robust solid catalyst facilitating the magnesium sulfite oxidation in the magnesia desulfurization process

2017 ◽  
Vol 5 (17) ◽  
pp. 8018-8028 ◽  
Author(s):  
Lidong Wang ◽  
Tieyue Qi ◽  
Siyu Wu ◽  
Shihan Zhang ◽  
Dan Qi ◽  
...  
Keyword(s):  
Solid Catalyst ◽  
Sulfite Oxidation ◽  
Desulfurization Process ◽  
Cobalt Loading

Effect of cobalt loading on the dispersity and catalysis performance.

Kinetics and Mechanism of Sulfite Oxidation in the Magnesium-Based Wet Flue Gas Desulfurization Process

2012 ◽  
Vol 51 (11) ◽  
pp. 4192-4198 ◽  
Author(s):  
Zhigang Shen ◽  
Shaopeng Guo ◽  
Wanzhong Kang ◽  
Kun Zeng ◽  
Ming Yin ◽  
...  
Keyword(s):  
Flue Gas ◽  
Kinetics And Mechanism ◽  
Flue Gas Desulfurization ◽  
Sulfite Oxidation ◽  
Desulfurization Process

scholarly journals Promoting magnesium sulfite oxidation via partly oxidized metal nanoparticles on graphitic carbon nitride (g-C3N4) in the magnesia desulfurization process

2018 ◽  
Vol 6 (24) ◽  
pp. 11296-11305 ◽  
Author(s):  
Meng Li ◽  
Tieyue Qi ◽  
Ruoxi Yang ◽  
Hui-Ning Xiao ◽  
Zhimo Fang ◽  
...  
Keyword(s):  
Developing Countries ◽  
Sulfur Dioxide ◽  
Metal Nanoparticles ◽  
Carbon Nitride ◽  
Acid Precipitation ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Sulfite Oxidation ◽  
Crucial Problem ◽  
Desulfurization Process

Sulfur dioxide (SO2) emission has become a crucial problem, especially in developing countries since it is one of the main reasons for the formation of acid precipitation.

Oxidation Kinetics of Magnesium Sulfite in Presence of Synthesized Solid Catalyst

2013 ◽  
Vol 750-752 ◽  
pp. 1844-1847
Author(s):  
Li Dong Wang ◽  
Jing Xian Guo ◽  
Pei Yao Xu ◽  
Xiao Yang ◽  
Qiang Wei Li
Keyword(s):  
Catalytic Effect ◽  
Performance Comparison ◽  
Solid Metal ◽  
Metal Catalyst ◽  
Solid Catalyst ◽  
Solid Catalysts ◽  
Sulfite Oxidation ◽  
Reaction Orders ◽  
Kinetics Of ◽  
Catalyzed Oxidation

In the present paper, a bubbling reactor is employed to investigate the macroscopical kinetics of magnesium sulfite oxidation in presence of the solid catalysts. A synthesized solid metal catalyst M was selected by performance comparison, which had significant catalytic effect on the oxidation rate of magnesium sulfite. The experimental results indicated that the reaction orders are 0 and 0.61 with respect to magnesium sulfite concentration and oxygen partial pressure. Moreover the apparent activation energy of the reaction is 10.66 KJ/mol. Thus a useful reference is provided for recycle of byproduct by catalyzed oxidation in magnesia desulphurization.

Synthesis of carbonate esters by carboxymethylation using NaAlO2 as a highly active heterogeneous catalyst

2018 ◽  
Author(s):  
Sreerangappa Ramesh ◽  
Kiran Indukuri ◽  
Olivier Riant ◽  
Damien Debecker
Keyword(s):  
Heterogeneous Catalyst ◽  
Dimethyl Carbonate ◽  
Sodium Aluminate ◽  
High Yield ◽  
Solid Catalyst ◽  
Highly Active ◽  
Aromatic Alcohols ◽  
Green Conditions ◽  
Mixed Carbonate

<p>Sodium aluminate is presented as a highly active heterogeneous catalyst able to convert a range of alcohols into the corresponding mixed carbonate esters, in high yield and under green conditions. The reaction is carried out using dimethyl carbonate both as a reactant and solvent, at 90°C. Allylic, aliphatic and aromatic alcohols are converted in good yields. The solid catalyst is shown to be truly heterogeneous, resistant to leaching, and recyclable. </p>

Synthesis, Characterization and Application of N,N-Dimethyl-N-Sulfoethan Ammonium tetra-Chloro Aluminate: A Novel micro-Heterogeneous Cata-lyst for Synthesis of tri-Arylmethanes

2020 ◽  
Vol 17 ◽  
Author(s):  
Saeid Azimi ◽  
Niloofar Mohamadighader
Keyword(s):  
Ionic Liquid ◽  
Heterogeneous Catalyst ◽  
Mass Spectroscopy ◽  
Aromatic Aldehydes ◽  
Solid Catalyst ◽  
Sem Images ◽  
One Pot ◽  
Acidic Catalyst ◽  
Eds Analysis ◽  
Ft Ir

Abstract: A new solid catalyst was synthesized from an ionic liquid and heterogenised by changing anion reaction. The new heterogeneous acidic catalyst was characterized by SEM images, EDS analysis, AFM images, Ft-IR, HNMR, 13CNMR and Mass Spectroscopy. It was applied to synthesis of tri-arylmethanes throughout one-pot tri-component reactions among aromatic aldehydes, N,N-dimethylaniline and other carbonic nucleophiles such as anisole and indole. Hence, synthesis of convenient and inexpensive micro-heterogeneous catalyst was introduced, the efficiency of which was confirmed. Also, various useful products were synthesized throughout this simple and clean procedure.

scholarly journals Investigation of the emission control of sulfur trioxide aerosols based on heterogeneous condensation and the deflectors tray of the desulfurization tower

RSC Advances ◽  
2020 ◽  
Vol 10 (63) ◽  
pp. 38515-38523
Author(s):  
Rui Zhang ◽  
Xiaodong Si ◽  
Lingling Zhao ◽  
Linjun Yang ◽  
Hao Wu
Keyword(s):  
Flue Gas ◽  
Sulfur Trioxide ◽  
Emission Control ◽  
Flue Gas Desulfurization ◽  
Heterogeneous Condensation ◽  
Desulfurization Process

In this paper, control over the emission of sulfur trioxide aerosols was investigated based on heterogeneous condensation in the wet flue gas desulfurization process.

scholarly journals Modified sodium molybdate as an efficient high yielding heterogeneous catalyst for biodiesel from Ghanaian indigenous Camelina sativa as a non-edible resource

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Mohammed Takase ◽  
Paul Kwame Essandoh ◽  
Rogers Kipkoech
Keyword(s):  
Reaction Time ◽  
Sodium Molybdate ◽  
Normal Pressure ◽  
Camelina Sativa ◽  
International Standards ◽  
Lewis Acidity ◽  
Molar Ratio ◽  
Solid Catalyst ◽  
Atmospheric Conditions ◽  
Heterogeneous Solid

AbstractSodium molybdate (Na2MoO4) has been synthesized and investigated as a heterogeneous solid catalyst for biodiesel from Camelina sativa seed oil. Transesterification reactions occurred under atmospheric conditions with relatively, low temperature short reaction time and normal pressure. The prepared catalyst was characterised by means of SEM, TGA, UV, XRD and FTIR. The properties of the biodiesel were compared with international standards. The transesterification reaction was very efficient with the optimum yield higher than 95% at methanol to oil molar ratio of 17:1, catalyst amount of 6%, reaction temperature of 60 °C and reaction time of 2.5 h. The molybdate complex had a high Lewis acidity and most certainly act as alcohol O–H bond leading to a transient species which has high nucleophilic character. The catalyst was easily recovered and after being washed for three times, showed capacity of recyclability for another catalytic reaction of five cycles with similar activity. The properties of the biodiesel were comparable to international standards.

scholarly journals Iron Based Core-Shell Structures as Versatile Materials: Magnetic Support and Solid Catalyst

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 72
Author(s):  
Christian Zambrzycki ◽  
Runbang Shao ◽  
Archismita Misra ◽  
Carsten Streb ◽  
Ulrich Herr ◽  
...  
Keyword(s):  
Water Purification ◽  
Functional Materials ◽  
Core Material ◽  
Solid Catalyst ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
The Core ◽  
Shell Nanostructures ◽  
Sio2 Shell ◽  
Iron Based

Core-shell materials are promising functional materials for fundamental research and industrial application, as their properties can be adapted for specific applications. In particular, particles featuring iron or iron oxide as core material are relevant since they combine magnetic and catalytic properties. The addition of an SiO2 shell around the core particles introduces additional design aspects, such as a pore structure and surface functionalization. Herein, we describe the synthesis and application of iron-based core-shell nanoparticles for two different fields of research that is heterogeneous catalysis and water purification. The iron-based core shell materials were characterized by transmission electron microscopy, as well as N2-physisorption, X-ray diffraction, and vibrating-sample magnetometer measurements in order to correlate their properties with the performance in the target applications. Investigations of these materials in CO2 hydrogenation and water purification show their versatility and applicability in different fields of research and application, after suitable individual functionalization of the core-shell precursor. For design and application of magnetically separable particles, the SiO2 shell is surface-functionalized with an ionic liquid in order to bind water pollutants selectively. The core requires no functionalization, as it provides suitable magnetic properties in the as-made state. For catalytic application in synthesis gas reactions, the SiO2-stabilized core nanoparticles are reductively functionalized to provide the catalytically active metallic iron sites. Therefore, Fe@SiO2 core-shell nanostructures are shown to provide platform materials for various fields of application, after a specific functionalization.

scholarly journals A Radiometric Technique for Monitoring the Desulfurization Process of Blister Copper

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 842
Author(s):  
Alejandro Vásquez ◽  
Francisco Pérez ◽  
Maximiliano Roa ◽  
Ignacio Sanhueza ◽  
Hugo Rojas ◽  
...  
Keyword(s):  
Near Infrared ◽  
Spectral Emissivity ◽  
Optical Probe ◽  
Blister Copper ◽  
Optical Absorption Spectroscopy ◽  
Total Irradiance ◽  
Desulfurization Process ◽  
Radiometric Technique ◽  
Collimating Lens ◽  
Total Emissivity

In this paper, a novel optical technique for following the progress of the blister copper desulfurization process is presented. The technique is based on the changes observed in the continuous spectrum of the visible–near-infrared (VIS–NIR) radiation that the blister melt emits while the chemical reactions of the sulfur elimination process are taking place. Specifically, the proposed technique uses an optical probe composed of an optical fiber, a collimating lens, and a quartz tube, which is immersed in the melt. This optical probe provides a field of view of the blowing zone where the desulfurization reaction occurs. The experimental results show that the melt VIS–NIR total irradiance evolves inversely to the SO2 concentration reported by a gas analyzer based on differential optical absorption spectroscopy. Furthermore, the blister copper spectral emissivity as well as the total emissivity observed throughout the process show strong correlation with the sulfur content during desulfurization reaction.

Sign in / Sign up

Export Citation Format

Share Document