Effect of Operating Conditions for Higher Alcohols Synthesis from Synthesis Gas over Alkali-Modified Co-Rh-Mo Trimetallic Catalyst Supported on Multi-Walled Carbon Nanotubes

nano Online ◽  
2016 ◽  
Author(s):  
Venkateswara Rao Surisetty ◽  
Janusz Kozinski ◽  
Ajay K. Dalai
Keyword(s):  
Carbon Nanotubes ◽  
Synthesis Gas ◽  
Operating Conditions ◽  
Higher Alcohols ◽  
Trimetallic Catalyst ◽  
Higher Alcohols Synthesis ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Effect of Operating Conditions for Higher Alcohols Synthesis from Synthesis Gas over Alkali-Modified Co-Rh-Mo Trimetallic Catalyst Supported on Multi-Walled Carbon Nanotubes

2011 ◽  
Vol 9 (1) ◽  
Author(s):  
Venkateswara Rao Surisetty ◽  
Janusz Kozinski ◽  
Ajay K. Dalai
Keyword(s):  
Carbon Nanotubes ◽  
Synthesis Gas ◽  
Fixed Bed ◽  
Operating Conditions ◽  
Fixed Bed Reactor ◽  
Optimum Operating ◽  
Higher Alcohols ◽  
Higher Alcohols Synthesis ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The effects of operating conditions on the higher alcohols synthesis reaction from synthesis gas were studied in a single-pass tubular downflow fixed-bed reactor, using sulfided K-promoted trimetallic Co-Rh-Mo catalyst supported on multi-walled carbon nanotubes (MWCNTs). The p CO conversion increased monotonically with increasing reaction temperature (from 275 to 350°C) and pressure (from 800 to 1400 psi), while decreasing monotonically with increasing GHSV (from 2.4 to 4.2 m3 (STP)/(kg of cat./h)). To maximize the ethanol STY and selectivity, the optimum operating conditions were determined as 330°C, 1320 psi, and 3.8 m3 (STP)/kg of cat./h). Maximum ethanol STY and selectivity were obtained using gas with H2 to CO molar ratio around 1.25.

scholarly journals Novel Ni-Co-Mo-K Catalysts Supported on Multiwalled Carbon Nanotubes for Higher Alcohols Synthesis

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Venkateswara Rao Surisetty ◽  
Janusz Kozinski ◽  
Ajay Kumar Dalai
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Synthesis Gas ◽  
Space Velocity ◽  
Molar Ratio ◽  
Higher Alcohols ◽  
Multiwalled Carbon ◽  
Ni Content ◽  
Trimetallic Catalyst ◽  
Higher Alcohols Synthesis

Alkali-promoted Ni-Co-Mo catalysts supported on multiwalled carbon nanotubes (MWCNTs) were prepared using 9 wt% K, 4.5 wt% Co, and 15 wt% Mo, whereas Ni content was varied from 0 to 6 wt%. The catalysts were extensively characterized and studied for higher alcohols synthesis from synthesis gas. Alkali-promoted trimetallic catalyst with 3 wt% Ni showed the highest total alcohols yield of 0.284 gm/(gm of cat./h), ethanol selectivity of 20%, and higher alcohols selectivity of 32% at 330°C and 9.0 MPa using gas hourly space velocity (GHSV) of 3.8 m3 (STP)/kg of catalyst/h and H2 to CO molar ratio of 1.25.

Influence of the operating conditions on the production rate of multi-walled carbon nanotubes in a CVD reactor

Carbon ◽  
2004 ◽  
Vol 42 (8-9) ◽  
pp. 1473-1482 ◽  
Author(s):  
C. Gommes ◽  
S. Blacher ◽  
Ch. Bossuot ◽  
P. Marchot ◽  
J. B.Nagy ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Production Rate ◽  
Operating Conditions ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Study on the Influences of Ultrasonic Conditions on the Dispersion of Multi-Walled Carbon Nanotubes in Reinforced Epoxy

2013 ◽  
Vol 561 ◽  
pp. 47-53
Author(s):  
Yu Mei Ding ◽  
Jian Qiang Wang ◽  
Ying An ◽  
Jian Bo Shao ◽  
Kun Ma ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Epoxy Resin ◽  
Operating Conditions ◽  
Suspension Stability ◽  
Ultrasonic Power ◽  
Ultrasonic Time ◽  
Resin Solution ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Ultrasonic Conditions

Absrtract. In this paper, the method of ultrasonic vibration in preparation of multi-walled carbon nanotubes(MWCNTs)/epoxy resin composites was studied. Suspension specimens of MWCNTs/epoxy resin solution prepared by different ultrasonic conditions were compared to find out the influences of operating conditions on dispersion properties. In this study, transmission electron microscopes(TEM) were used to characterize the morphology of the blends and suspension stability was used to evaluate the stability of blends. The results showed that ultrasonic power, ultrasonic time and material quantity have great effect on the dispersion of MWCNTs in epoxy resin solution. Increasing ultrasonic power and time can improve dispersion of MWCNTs, and decreasing material quantity within an appropriate range was helpful to disperse MWCNTs into epoxy resin solution. The results of suspension stability were very similar with TEM results, which demonstrate that suspension stability of MWCNTs/epoxy resin blending could be used as an assistant method to characterize the dispersion of MWCNTs in epoxy resin.

scholarly journals Carbon Nanotubes for Removal of Fast Green Dye

2020 ◽  
pp. 25-35
Author(s):  
Haydar A. Mohammad-Salim ◽  
Sabir Ayob Mohammed Salih ◽  
Mohammed Mahmoud Molla-Babaker
Keyword(s):  
Carbon Nanotubes ◽  
Dye Removal ◽  
Langmuir Equation ◽  
Operating Conditions ◽  
Fast Green ◽  
Adsorption Data ◽  
Multi Walled Carbon Nanotubes ◽  
Analysis Of Results ◽  
Walled Carbon Nanotubes ◽  
Langmuir And Freundlich Models

The adsorption of Fast Green (FG) dye on pristine multi-walled carbon nanotubes (CNTs) was investigated in this study. The adsorption was carried out under different operating conditions. The operating conditions were contact time, adsorbent dosage, initial dye concentration, the pH of the solution and temperature. The analysis of results found that the removal percentage of FG dye on CNTs decreases with increase in initial FG concentration. It was found that the increasing of CNTs dosage enhanced the efficiency of dye removal. It was also found that the increasing of temperature significantly enhanced the removal percent of FG dye and it is indicated that the adsorption of FG dye on CNTs was in endothermic nature. The study reports that the best pH of solution for the adsorption of FG on CNTs were 4. The adsorption data have been analyzed using Langmuir and Freundlich. Fitting the equilibrium adsorption data by Langmuir and Freundlich models shows that experimental data well explained by the Langmuir equation.

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