Catalytic Performance and Carbon Deposition Behavior of a NiO−MgO Solid Solution in Methane Reforming with Carbon Dioxide under Pressurized Conditions

2000 ◽  
Vol 39 (6) ◽  
pp. 1891-1897 ◽  
Author(s):  
Keiichi Tomishige ◽  
Yoshiyuki Himeno ◽  
Yuichi Matsuo ◽  
Yusuke Yoshinaga ◽  
Kaoru Fujimoto
Keyword(s):  
Carbon Dioxide ◽  
Solid Solution ◽  
Carbon Deposition ◽  
Catalytic Performance ◽  
Methane Reforming ◽  
Deposition Behavior

Carbon deposition in methane reforming with carbon dioxide

1996 ◽  
Vol 47 (1) ◽  
pp. 227-234 ◽  
Author(s):  
P. Gronchi ◽  
D. Fumagalli ◽  
R. Del Rosso ◽  
P. Centola
Keyword(s):  
Carbon Dioxide ◽  
Carbon Deposition ◽  
Methane Reforming

Carbon Dioxide Reforming of Methane over Ni/Mo/La2O3-SBA-15 Сatalyst

2012 ◽  
Vol 455-456 ◽  
pp. 960-965
Author(s):  
Jian Huang ◽  
T. Huang ◽  
A. Rongzhang ◽  
Wei Huang ◽  
Ren Xiong Ma
Keyword(s):  
Carbon Dioxide ◽  
Strong Interaction ◽  
Carbon Deposition ◽  
Catalytic Performance ◽  
Stability Test ◽  
X Ray Diffraction ◽  
Carbon Dioxide Reforming ◽  
X Ray ◽  
Long Term Stability

Carbon dioxide reforming of methane over Ni/Mo/ La2O3-SBA-15 was studied. The catalyst was characterized by N2 adsorption, X-ray diffraction, H2-TPR,CO2-TPD and TG-GTA analysis. The results indicated that the introduction of an appropriate amount of La2O3 exhibited a higher activity and stability. In the long term stability test, La2O3 impregnated Ni/Mo-SBA-15 gave the highest conversion and stable activity at 800°C for 250 h. The effect of La was suggested to be due to its lower tendency to carbon deposition. Characterization results showed a strong interaction between La and Mo or Ni which facilitated the improvement of catalytic performance.

scholarly journals The Role of Strontium in CeNiO3 Nano-Crystalline Perovskites for Greenhouse Gas Mitigation to Produce Syngas

Molecules ◽  
2022 ◽  
Vol 27 (2) ◽  
pp. 356
Author(s):  
Naushad Ahmad ◽  
Rizwan Wahab ◽  
Salim Manoharadas ◽  
Basel F. Alrayes ◽  
Munawwer Alam ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Active Sites ◽  
Catalytic Performance ◽  
Catalyst Stability ◽  
Methane Reforming ◽  
Metal Support Interaction ◽  
Production Of Hydrogen

The transition metal-based catalysts for the elimination of greenhouse gases via methane reforming using carbon dioxide are directly or indirectly associated with their distinguishing characteristics such as well-dispersed metal nanoparticles, a higher number of reducible species, suitable metal–support interaction, and high specific surface area. This work presents the insight into catalytic performance as well as catalyst stability of CexSr1−xNiO3 (x = 0.6–1) nanocrystalline perovskites for the production of hydrogen via methane reforming using carbon dioxide. Strontium incorporation enhances specific surface area, the number of reducible species, and nickel dispersion. The catalytic performance results show that CeNiO3 demonstrated higher initial CH4 (54.3%) and CO2 (64.8%) conversions, which dropped down to 13.1 and 19.2% (CH4 conversions) and 26.3 and 32.5% (CO2 conversions) for Ce0.8Sr0.2NiO3 and Ce0.6Sr0.4NiO3, respectively. This drop in catalytic conversions post strontium addition is concomitant with strontium carbonate covering nickel active sites. Moreover, from the durability results, it is obvious that CeNiO3 exhibited deactivation, whereas no deactivation was observed for Ce0.8Sr0.2NiO3 and Ce0.6Sr0.4NiO3. Carbon deposition during the reaction is mainly responsible for catalyst deactivation, and this is further established by characterizing spent catalysts.

The Catalysis of NiO-Al2O3 Aerogels for the Methane Reforming by Carbon Dioxide

2006 ◽  
Vol 45 ◽  
pp. 2137-2142
Author(s):  
Toshihiko Osaki ◽  
Toshiaki Mori
Keyword(s):  
Carbon Dioxide ◽  
Carbon Deposition ◽  
Catalyst Deactivation ◽  
Sol Gel ◽  
Supercritical Drying ◽  
High Dispersion ◽  
Methane Reforming ◽  
Impregnation Method ◽  
Alumina Aerogel ◽  
Nickel Particles

The aerogels of nickel-alumina system have been synthesized from aluminum triisoprppoxide and nickel glycoxide by sol-gel and subsequent supercritical drying, and the catalysis of NiO-Al2O3 aerogels for the methane reforming by carbon dioxide have been examined. The aerogel catalysts showed higher activity for the reforming than the impregnation catalysts prepared by a conventional impregnation method, on the other hand, the carbon deposition was much less significant on the aerogel catalysts than on the impregnation catalysts. By TEM and XRD observations, it was found for aerogel catalysts that fine nickel particles were formed throughout the alumina aerogel support with high dispersion. This resulted in not only higher catalytic reforming activity but also much less coking activity. The suppression of catalyst deactivation during the reforming was ascribed to the retardation of both carbon deposition and sintering of nickel particles on alumina aerogel support.

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