Thermotechnical comparison of conventional heating and microwave radiation method for dewatering of sewage sludge

2017 ◽  
Vol 72 ◽  
pp. 274-280 ◽  
Author(s):  
Yasar Avsar ◽  
Ugur Kurt
Keyword(s):  
Sewage Sludge ◽  
Microwave Radiation ◽  
Conventional Heating ◽  
Radiation Method ◽  
Microwave Radiation Method

Facile synthesis and enhanced microwave absorption properties of anthracite-based carbon/Ni3Fe/NiO ternary composites

2020 ◽  
Vol 44 (33) ◽  
pp. 13962-13970
Author(s):  
Hengdong Ren ◽  
Jialin Ma ◽  
Jun Zhou ◽  
Xiangfeng Shu ◽  
Zhenying Liu ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Microwave Radiation ◽  
Low Frequency ◽  
Microwave Absorber ◽  
Facile Synthesis ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Radiation Method ◽  
Microwave Radiation Method

A low-frequency microwave absorber was synthesized by using a microwave radiation method.

The Characterization and Photocatalytic Properties of Mesoporous WO3•0.33H2O•NiO Nanocrystalline Synthesized through Using the Microwave Radiation Method

2009 ◽  
Vol 60-61 ◽  
pp. 480-485 ◽  
Author(s):  
Li Xia Zou ◽  
Qing Cheng Liu ◽  
Qing Zhong ◽  
Xiu Ming Bai ◽  
Li Jun Dong
Keyword(s):  
Photocatalytic Activity ◽  
Microwave Radiation ◽  
High Surface ◽  
High Surface Area ◽  
Soxhlet Extraction ◽  
Nitrogen Adsorption ◽  
Radiation Method ◽  
Xrd Patterns ◽  
Gaseous Formaldehyde ◽  
Microwave Radiation Method

Mesoporous WO3•0.33H2O was synthesized by the microwave radiation method using surfactant as the template-directing agent, and the template was removed by Soxhlet extraction. The degree of framework substitution had been monitored by means of powder X-ray diffraction (XRD), nitrogen adsorption, and UV-vis diffuse reflectance (DRUV) spectroscopy techniques. Nitrogen adsorption data and XRD patterns confirmed that, the structure, high surface area, and uniform pore size distribution were maintained in the crystallized samples. The photocatalytic activity for the photo-oxidation of gaseous formaldehyde on the mesoporous WO3•0.33H2O synthesized was improved by NiO loading, the photocatalytic activity was higher than both that of the materials synthesized using calcination in high temperature and commercial Degussa P25 TiO2 under visible light and UV irradiation.

Rapid synthesis of mesoporous silica by an accelerated microwave radiation method

2004 ◽  
Vol 21 (6) ◽  
pp. 1224-1230 ◽  
Author(s):  
Myung-Geun Song ◽  
Jong-Yun Kim ◽  
Sung-Ho Cho ◽  
Jong-Duk Kim
Keyword(s):  
Mesoporous Silica ◽  
Microwave Radiation ◽  
Rapid Synthesis ◽  
Radiation Method ◽  
Microwave Radiation Method

A Study in the Adsorption Behaviors of Cr (VI) on Crosslinked Amphoteric Starches Synthesized through Using the Microwave Radiation Method

2009 ◽  
Vol 87-88 ◽  
pp. 387-392 ◽  
Author(s):  
Li Xia Zou ◽  
Qing Cheng Liu ◽  
Qiong Xu ◽  
Jing Hua Rong
Keyword(s):  
Adsorption Capacity ◽  
Microwave Radiation ◽  
Quaternary Ammonium ◽  
Langmuir Isotherm ◽  
Degree Of Substitution ◽  
Modified Starch ◽  
Radiation Method ◽  
Adsorption Behaviors ◽  
Anionic Groups ◽  
Microwave Radiation Method

Crosslinked amphoteric starches (CAS) with quaternary ammonium cationic and carboxymethyl anionic groups were prepared by a microwave radiation method. Their adsorption behavior for Cr(VI) was investigated. The results showed that high the degree of substitution (DS) of modified starch was favorable to the synthesis by the microwave heating and crosslinked amphoteric starches prepared with higher the adsorption capacity than by the drying reaction. The adsorption capacity increases with the increasing cationic groups and decreased with increasing degree of substitution of anionic groups. The adsorption capacity was found to follow the Langmuir isotherm.

scholarly journals Microwaves and Heterogeneous Catalysis: A Review on Selected Catalytic Processes

Catalysts ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 246 ◽  
Author(s):  
Vincenzo Palma ◽  
Daniela Barba ◽  
Marta Cortese ◽  
Marco Martino ◽  
Simona Renda ◽  
...  
Keyword(s):  
Heterogeneous Catalysis ◽  
Energy Saving ◽  
Microwave Heating ◽  
Microwave Radiation ◽  
Heterogeneous Catalysts ◽  
Conventional Heating ◽  
Specific Effects ◽  
Natural Choice ◽  
Future Challenges ◽  
Catalyzed Reactions

Since the late 1980s, the scientific community has been attracted to microwave energy as an alternative method of heating, due to the advantages that this technology offers over conventional heating technologies. In fact, differently from these, the microwave heating mechanism is a volumetric process in which heat is generated within the material itself, and, consequently, it can be very rapid and selective. In this way, the microwave-susceptible material can absorb the energy embodied in the microwaves. Application of the microwave heating technique to a chemical process can lead to both a reduction in processing time as well as an increase in the production rate, which is obtained by enhancing the chemical reactions and results in energy saving. The synthesis and sintering of materials by means of microwave radiation has been used for more than 20 years, while, future challenges will be, among others, the development of processes that achieve lower greenhouse gas (e.g., CO2) emissions and discover novel energy-saving catalyzed reactions. A natural choice in such efforts would be the combination of catalysis and microwave radiation. The main aim of this review is to give an overview of microwave applications in the heterogeneous catalysis, including the preparation of catalysts, as well as explore some selected microwave assisted catalytic reactions. The review is divided into three principal topics: (i) introduction to microwave chemistry and microwave materials processing; (ii) description of the loss mechanisms and microwave-specific effects in heterogeneous catalysis; and (iii) applications of microwaves in some selected chemical processes, including the preparation of heterogeneous catalysts.

scholarly journals Application of microwave radiation in the grafting of acidic sites on SBA-15 type material

2021 ◽  
Author(s):  
Maciej Trejda ◽  
Magdalena Drobnik ◽  
Ardian Nurwita
Keyword(s):  
Microwave Radiation ◽  
Thermal Analyses ◽  
Conventional Heating ◽  
Material Surface ◽  
Test Reaction ◽  
Study Materials ◽  
Mesoporous Support ◽  
Acidic Sites ◽  
Post Synthesis ◽  
Adsorption Desorption

AbstractMesoporous silica of SBA-15 type was modified for the first time with 3-(trihydroxysiyl)-1-propanesulfonic acid (TPS) by post-synthesis modification involving microwave or conventional heating in order to generate the Brønsted acidic centers on the material surface. The samples structure and composition were examined by low temperature N2 adsorption/desorption, XRD, HRTEM, elemental and thermal analyses. The surface properties were evaluated by esterification of acetic acid with n-hexanol used as the test reaction. A much higher efficiency of TPS species incorporation was reached with the application of microwave radiation for 1 h than conventional modification for 24 h. It was found that the structure of mesoporous support was preserved after modification using both methods applied in this study. Materials obtained with the use of microwave radiation showed a superior catalytic activity and high stability.

Epoxidation of oleic acid under conventional heating and microwave radiation

2016 ◽  
Vol 102 ◽  
pp. 70-87 ◽  
Author(s):  
Adriana Freites Aguilera ◽  
Pasi Tolvanen ◽  
Kari Eränen ◽  
Sébastien Leveneur ◽  
Tapio Salmi
Keyword(s):  
Oleic Acid ◽  
Microwave Radiation ◽  
Conventional Heating
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