Deactivation Studies of Alkali-Promoted Trimetallic Co−Rh−Mo Sulfide Catalysts for Higher Alcohols Synthesis from Synthesis Gas

2011 ◽  
Vol 25 (2) ◽  
pp. 580-590 ◽  
Author(s):  
Venkateswara Rao Surisetty ◽  
Ajay Kumar Dalai ◽  
Janusz Kozinski
Keyword(s):  
Synthesis Gas ◽  
Higher Alcohols ◽  
Sulfide Catalysts ◽  
Higher Alcohols Synthesis ◽  
Mo Sulfide

The Effect of CO Pretreatment on Fe/ADM Catalyst for Higher Alcohols Synthesis from Syngas

2011 ◽  
Vol 347-353 ◽  
pp. 3772-3776
Author(s):  
Hai Cheng Xiao ◽  
Fan Hua Kong ◽  
Gui Zhi Wang ◽  
Si Han Wang ◽  
Gang Wang ◽  
...  
Keyword(s):  
High Activity ◽  
Synthesis Gas ◽  
Iron Carbide ◽  
Catalytic Performance ◽  
Higher Alcohols ◽  
Xps Spectra ◽  
Higher Alcohols Synthesis ◽  
Hydrocarbons Synthesis

The catalyst of FeS modified K2CO3/MoS2 (ADM) (Fe/ADM) were prepared and tested for higher alcohols (C2+OH) synthesis (HAS) from synthesis gas(syngas, mixture of H2 and CO). The effects of CO pretreatment on Fe/ADM catalyst and the catalytic performance for HAS were investigated. The ability for C2+OH formation was enhanced and the hydrocarbon selectivity was lowered after CO pretreatment. The XPS spectra revealed that the iron carbide species appeared and the potassium enriched on the surface of CO pretreated Fe/ADM catalyst, which might be responsible for the high activity of higher alcohols and low hydrocarbons synthesis, respectively.

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.

scholarly journals Catalysts design for higher alcohols synthesis by CO2 hydrogenation: Trends and future perspectives

2021 ◽  
Vol 291 ◽  
pp. 120073
Author(s):  
Feng Zeng ◽  
Chalachew Mebrahtu ◽  
Xiaoying Xi ◽  
Longfei Liao ◽  
Jie Ren ◽  
...  
Keyword(s):  
Co2 Hydrogenation ◽  
Higher Alcohols ◽  
Future Perspectives ◽  
Higher Alcohols Synthesis

scholarly journals Ultra-small and highly-dispersed MoP particles for remarkable enhanced catalytic performance in higher alcohols synthesis

2020 ◽  
Vol 137 ◽  
pp. 105945 ◽  
Author(s):  
Bin Kang ◽  
Shuxia Qi ◽  
Xiaoman Wang ◽  
Fenghua Bai ◽  
Na Wang ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Higher Alcohols ◽  
Higher Alcohols Synthesis ◽  
Highly Dispersed
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