Synthetic kenyaite as catalyst support for hydrocarbon combustion

2006 ◽  
Vol 66 (3-4) ◽  
pp. 192-197 ◽  
Author(s):  
Yuri Kalvachev ◽  
Vladislav Kostov-Kytin ◽  
Silvia Todorova ◽  
Krasimir Tenchev ◽  
Georgi Kadinov
Keyword(s):  
Catalyst Support ◽  
Hydrocarbon Combustion

Support and Goal Outcomes during COVID-19

2020 ◽  
Author(s):  
Laura Marika Vowels ◽  
Katherine Carnelley
Keyword(s):  
Catalyst Support ◽  
Daily Diary ◽  
Goal Pursuit ◽  
Structured Interview ◽  
Partner Support ◽  
Mixed Methods Study ◽  
Instrumental Support ◽  
The Face ◽  
Quantitative Results ◽  
Sources Of Support

During the COVID-19 pandemic, people have been stuck indoors with their partners for months. Having a supportive partner is likely to be especially important during this time where access to outside sources of support is limited. Individuals have to continue to work on goals and tasks while dealing with demands caused by the pandemic. The present mixed-methods study aimed to investigate how partner support is associated with goal outcomes during COVID-19. The quantitative participants (n = 200) completed a daily diary for a week and weekly longitudinal reports for a month and 48 participants attended a semi-structured interview. The quantitative results showed that higher relational catalyst support was associated with better goal outcomes; qualitative analyses revealed partners use direct and indirect forms of emotional and instrumental support toward goal pursuit. Across both forms of data, participants’ resilience in the face of the pandemic was evident.

scholarly journals Photocatalytic Reduction of CO2 to Methanol Using a Copper-Zirconia Imidazolate Framework

Catalysts ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 346
Author(s):  
Sonam Goyal ◽  
Maizatul Shima Shaharun ◽  
Ganaga Suriya Jayabal ◽  
Chong Fai Kait ◽  
Bawadi Abdullah ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Catalyst Support ◽  
Oxidation Potential ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Molar Ratios ◽  
Optimum Parameters ◽  
Reduction Of Co2 ◽  
Enhanced Yield

A set of novel photocatalysts, i.e., copper-zirconia imidazolate (CuZrIm) frameworks, were synthesized using different zirconia molar ratios (i.e., 0.5, 1, and 1.5 mmol). The photoreduction process of CO2 to methanol in a continuous-flow stirred photoreactor at pressure and temperature of 1 atm and 25 °C, respectively, was studied. The physicochemical properties of the synthesized catalysts were studied using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and photoluminescence (PL) spectroscopy. The highest methanol activity of 818.59 µmol/L.g was recorded when the CuZrIm1 catalyst with Cu/Zr/Im/NH4OH molar ratio of 2:1:4:2 (mmol/mmol/mmol/M) was employed. The enhanced yield is attributed to the presence of Cu2+ oxidation state and the uniformly dispersed active metals. The response surface methodology (RSM) was used to optimize the reaction parameters. The predicted results agreed well with the experimental ones with the correlation coefficient (R2) of 0.99. The optimization results showed that the highest methanol activity of 1054 µmol/L.g was recorded when the optimum parameters were employed, i.e., stirring rate (540 rpm), intensity of light (275 W/m2) and photocatalyst loading (1.3 g/L). The redox potential value for the CuZrIm1 shows that the reduction potential is −1.70 V and the oxidation potential is +1.28 V for the photoreduction of CO2 to methanol. The current work has established the potential utilization of the imidazolate framework as catalyst support for the photoreduction of CO2 to methanol.

scholarly journals Extraction Methods and Their Influence on Yield When Extracting Thermo-Vacuum-Modified Chestnut Wood

Forests ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 73
Author(s):  
Maurizio D’Auria ◽  
Marisabel Mecca ◽  
Maria Roberta Bruno ◽  
Luigi Todaro
Keyword(s):  
Catalyst Support ◽  
Castanea Sativa ◽  
Extraction Methods ◽  
Extraction Technique ◽  
Extraction Techniques ◽  
Surface Color ◽  
Ms Analysis ◽  
Castanea Sativa Mill ◽  
Molybdenum Catalysts ◽  
Chestnut Wood

Improvements in the yield and solubility of chestnut wood extractives, by using different extraction methods and molybdenum catalysts as support, have rarely been reported in literature. Many studies focus on the different parts of trees, except for the chemical characteristics of the remaining extractives achieved from thermally modified (THM) chestnut (Castanea sativa Mill) wood. This research seeks to better understand the effects of extraction techniques and catalysts on the yield and solubility of extractives. GC-MS analysis of the chloroform soluble and insoluble fractions was also used. Accelerated Solvent Extraction (ASE) 110 °C, Soxhlet, and autoclave extraction techniques were used to obtain extractives from untreated and thermally modified (THM) chestnut wood (170 °C for 3 h). Ethanol/H2O, ethanol/toluene, and water were the solvents used for each technique. A polyoxometalate compound (H3PMo12O40) and MoO3 supported on silica were used as catalysts. The THM induced a change in the wood’s surface color (ΔE = 21.5) and an increase in mass loss (5.9%), while the equilibrium moisture content (EMC) was reduced by 17.4% compared to the control wood. The yields of the extractives and their solubility were always higher in THM and mainly used ASE as the technique. GC-MS analysis of the extractives, without catalyst support, showed different results for each extraction technique and type of wood (untreated and THM). Ultimately, the amount of extractive compound dissolved in each solvent will differ, and the choice of extraction technique will depend on the intended final application of the extracted chemical product.

Catalyst-Support Interactions Enhanced Electrochemical Nitrogen Reduction on Au/ZrO2

2021 ◽  
pp. 138222
Author(s):  
Jiankun Wei ◽  
Yidan Jing ◽  
Zelin Zhao ◽  
Zhengwen Fan ◽  
Zijia Liang ◽  
...  
Keyword(s):  
Catalyst Support ◽  
Nitrogen Reduction

scholarly journals Control of hydrogen release during borohydride electrooxidation with porous carbon materials

RSC Advances ◽  
2021 ◽  
Vol 11 (26) ◽  
pp. 15639-15655
Author(s):  
Małgorzata Graś ◽  
Grzegorz Lota
Keyword(s):  
Porous Carbon ◽  
Carbon Materials ◽  
Catalyst Support ◽  
Hydrogen Release ◽  
Technological Application ◽  
Porous Carbon Materials ◽  
Borohydride Electrooxidation

The borohydride electrooxidation process is complex. Technological application of carbon materials is manifested not only in their use as a catalyst support, but also as a physical trap for hydrogen generated during the parasitic hydrolysis.

Effect of Catalyst Support on Aromatic Monomer Production from Lignocellulosic Biomass Over Pt-Based Catalysts

2021 ◽  
Author(s):  
Kiyoyuki Yamazaki ◽  
Ryuto Sasaki ◽  
Tatsuya Watanabe ◽  
Satoko Kuwano ◽  
Yuka Murakami ◽  
...  
Keyword(s):  
Lignocellulosic Biomass ◽  
Catalyst Support ◽  
Aromatic Monomer
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