Production of Synthesis Gas via Dry Reforming of Methane over Co-Based Catalysts: Effect on H2/CO Ratio and Carbon Deposition

2015 ◽  
Vol 38 (8) ◽  
pp. 1397-1405 ◽  
Author(s):  
Ahmed A. Ibrahim ◽  
Muhammad Awais Naeem ◽  
Anis H. Fakeeha ◽  
Wasim Ullah Khan ◽  
Ahmed S. Al-Fatesh ◽  
...  
Keyword(s):  
Synthesis Gas ◽  
Carbon Deposition ◽  
Dry Reforming ◽  
Dry Reforming Of Methane

Effect of Calcium Promoter on Ni-Based Catalysts Supported on α-Al2O3 and TiO2-P25

2012 ◽  
Vol 204-208 ◽  
pp. 3909-3913 ◽  
Author(s):  
A.H. Fakeeha ◽  
A.S. Al-Fatesh ◽  
A.A. Ibrahim ◽  
A.E. Abasaeed
Keyword(s):  
Synthesis Gas ◽  
Carbon Deposition ◽  
Catalyst Deactivation ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Carbon Formation ◽  
Ni Catalysts ◽  
Active Metal ◽  
Α Al2o3 ◽  
Gas Ratio

CH4 and CO2 are greenhouse gases. Hence, their emission to the atmosphere must be controlled to avoid the global warming. Dry reforming of methane could provide a valuable tool in alleviating this problem as well as producing synthesis gas. This process is hampered by rapid catalyst deactivation due to carbon deposition and sintering of both the support and active metal. The presented study focuses on the experimental investigation the effect of addition of Calcium promoter to 1%Ni catalysts supported on a mixed 80%α-Al2O3 and 20%TiO2-P25 support. The performance of the developed catalyst was quantified by determining CH4 and CO2 conversions, synthesis gas ratio (H2/CO) and stability. Spent and fresh catalysts were characterized by TGA, SEM and EDS. Time on stream stability tests of the promoted catalyst showed that addition of limited amounts of Ca promoter would reduce carbon formation.

scholarly journals Effect of La2O3 as a Promoter on the Pt,Pd,Ni/MgO Catalyst in Dry Reforming of Methane Reaction

Catalysts ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 750 ◽  
Author(s):  
Ali M. A. Al-Najar ◽  
Faris A. J. Al-Doghachi ◽  
Ali A. A. Al-Riyahee ◽  
Yun Hin Taufiq-Yap
Keyword(s):  
Carbon Deposition ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Precipitation Method ◽  
Gravimetric Analysis ◽  
Bet Method ◽  
Spent Catalysts ◽  
Ft Ir ◽  
Co Precipitation ◽  
Surfactant Assisted

Pt,Pd,Ni/MgO, Pt,Pd,Ni/Mg0.97La3+0.03O, Pt,Pd,Ni/Mg0.93La3+0.07O, and Pt,Pd,Ni/Mg0.85La3+0.15O (1% of each of the Ni, Pd, and Pt) catalysts were prepared by a surfactant-assisted co-precipitation method. Samples were characterized by the XRD, XPS, XRF, FT-IR, H2-TPR, TEM, the Brunauer–Emmett–Teller (BET) method, and TGA and were tested for the dry reforming of methane (DRM). TEM and thermal gravimetric analysis (TGA) methods were used to analyze the carbon deposition on spent catalysts after 200 h at 900 °C. At a temperature of 900 °C and a 1:1 CH4:CO2 ratio, the tri-metallic Pt,Pd,Ni/Mg0.85La3+0.15O catalyst with a lanthanum promoter showed a higher conversion of CH4 (85.01%) and CO2 (98.97%) compared to the Ni,Pd,Pt/MgO catalysts in the whole temperature range. The selectivity of H2/CO decreased in the following order: Pt,Pd,Ni/Mg0.85La3+0.15O > Pt,Pd,Ni/Mg0.93La3+0.07O > Pt,Pd,Ni/Mg0.97La3+0.03O > Ni,Pd,Pt/MgO. The results indicated that among the catalysts, the Pt,Pd,Ni/Mg0.85La23+0.15O catalyst exhibited the highest activity, making it the most suitable for the dry reforming of methane reaction.

Combined partial oxidation and dry reforming of methane to synthesis gas over noble metals supported on Mg–Al mixed oxide

2004 ◽  
Vol 275 (1-2) ◽  
pp. 149-155 ◽  
Author(s):  
Andrey I. Tsyganok ◽  
Mieko Inaba ◽  
Tatsuo Tsunoda ◽  
Kunio Suzuki ◽  
Katsuomi Takehira ◽  
...  
Keyword(s):  
Partial Oxidation ◽  
Synthesis Gas ◽  
Mixed Oxide ◽  
Noble Metals ◽  
Dry Reforming ◽  
Dry Reforming Of Methane

CO2 conversion to synthesis gas via DRM on the durable Al2O3/Ni/Al2O3 sandwich catalyst with high activity and stability

2018 ◽  
Vol 20 (12) ◽  
pp. 2781-2787 ◽  
Author(s):  
Yu Zhao ◽  
Yunqing Kang ◽  
Hui Li ◽  
Hexing Li
Keyword(s):  
High Activity ◽  
Synthesis Gas ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Molar Ratio ◽  
Co2 Conversion

CO2 conversion to synthesis gas with a CO/H2 molar ratio around 1 was realized by using the dry reforming of methane reaction (DRM) at 800 °C.

scholarly journals One-Step Synthesis of Highly Dispersed and Stable Ni Nanoparticles Confined by CeO2 on SiO2 for Dry Reforming of Methane

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5956
Author(s):  
Chengyang Zhang ◽  
Renkun Zhang ◽  
Hui Liu ◽  
Qinhong Wei ◽  
Dandan Gong ◽  
...  
Keyword(s):  
Carbon Deposition ◽  
Combustion Method ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Solution Combustion ◽  
Spatial Confinement ◽  
Oxide Interfaces ◽  
Highly Dispersed ◽  
One Step ◽  
The One

Sintering and carbon deposition are the two main ways to deactivate Ni-based catalysts during methane reforming. Herein, a stable Ni-CeO2/SiO2(CSC) catalyst was prepared by a one-step colloidal solution combustion method (CSC) and used for dry reforming of methane. In the catalyst, the small Ni particles were confined by CeO2 particles and highly dispersed on the surface of SiO2, forming a spatial confinement structure with a rich Ni-CeO2 interface in the catalyst. The Ni-CeO2/SiO2(CSC) catalyst prepared by the one-step CSC method exhibited superior activity at 700 °C during dry reforming of methane, and the performance of the catalyst was stable after 20 h of reaction with only a small amount of carbon deposition present (1.8%). Due to the spatial confinement effect, Ni was stable and less than 5 nm during reaction. The small Ni particle size and rich Ni-CeO2 interface reduced the rate of carbon deposition. This colloidal combustion method could be applied to prepare stable metal-based catalysts with rich metal–oxide interfaces for high-temperature reactions.

Sign in / Sign up

Export Citation Format

Share Document