Promoting effect of the alloy formation over Ni-Fe/Al2O3 catalysts for the steam reforming of biomass tar to synthesis gas

2011 ◽  
Vol 1326 ◽  
Author(s):  
Lei Wang ◽  
Dalin Li ◽  
Mitsuru Koike ◽  
Yoshinao Nakagawa ◽  
Keiichi Tomishige
Keyword(s):  
Steam Reforming ◽  
Surface Segregation ◽  
Coke Formation ◽  
Catalytic Performance ◽  
Alloy Formation ◽  
Promoting Effect ◽  
Suitable Amount ◽  
Biomass Tar ◽  
Fe Alloys

ABSTRACTThe addition of Fe addition with suitable amount to Ni /Al2O3 catalyst showed higher catalytic performance than corresponding monometallic Ni and Fe catalysts in the steam reforming of tar from the pyrolysis of cedar wood. Characterization of the catalysts indicates the formation of the Ni-Fe alloys and the surface segregation of Fe atoms on the alloys, and it was also suggested that the structure was almost maintained during the reaction. The surface Fe atoms accept oxygen atom from steam and subsequently supply oxygen species to adsorbed carbonaceous species on neighboring surface Ni atoms, which is connected to the promotion of the steam reforming reaction of tar and the suppression of the coke formation.

scholarly journals Comparison of the Catalytic Performance of Ni/CeO2/ZrO2 and Commercial Catalyst during Steam Reforming of Methane

2008 ◽  
Vol 8 (1 & 2) ◽  
pp. 19
Author(s):  
Anton Purnomo ◽  
Susan Gellardo ◽  
Leonila Abella ◽  
Hirofumi Hinode ◽  
Chris Salim
Keyword(s):  
Steam Reforming ◽  
Thermo Gravimetric Analysis ◽  
Coke Formation ◽  
Catalytic Performance ◽  
Gravimetric Analysis ◽  
Commercial Catalyst ◽  
Operation Temperature ◽  
Zro2 Catalyst ◽  
Steam Reforming Of Methane

Catalytic performance and characterization of Ni/CeO2/ZrO2 and commercial catalyst from Indonesia were investigated in steam reforming of methane. Ni/CeO2/ZrO2 catalyst was prepared using co-impregnation of cerium nitrate and nickel nitrate onto zirconia support material. BET, SEM, EDS, XRD, TPD, TG, and ICP analyses were employed for the characterization of the catalysts. Remarkable catalytic performance of Ni/CeO2/ZrO2 catalyst at 600oC operating temperature and atmospheric pressure of about 74.9% methane conversion was obtained compared to 55.9% using the commercial catalyst. In addition, the presence of cerium in Ni/CeO2/ZrO2 was effective in improving the stability and resistance to coke formation. Less carbon formation was confirmed from the thermo-gravimetric analysis. These results showed that the prepared catalyst is promising in the industrial application which can be used at lower operation temperature for energy saving.

Catalytic performance and characterization of Ni–Co catalysts for the steam reforming of biomass tar to synthesis gas

Fuel ◽  
2013 ◽  
Vol 112 ◽  
pp. 654-661 ◽  
Author(s):  
Lei Wang ◽  
Dalin Li ◽  
Mitsuru Koike ◽  
Hideo Watanabe ◽  
Ya Xu ◽  
...  
Keyword(s):  
Synthesis Gas ◽  
Steam Reforming ◽  
Catalytic Performance ◽  
Co Catalysts ◽  
Biomass Tar

Catalytic performance and characterization of Ni-Fe catalysts for the steam reforming of tar from biomass pyrolysis to synthesis gas

2011 ◽  
Vol 392 (1-2) ◽  
pp. 248-255 ◽  
Author(s):  
Lei Wang ◽  
Dalin Li ◽  
Mitsuru Koike ◽  
Shuichi Koso ◽  
Yoshinao Nakagawa ◽  
...  
Keyword(s):  
Synthesis Gas ◽  
Steam Reforming ◽  
Catalytic Performance ◽  
Biomass Pyrolysis ◽  
Fe Catalysts

SYNTHESIS AND CHARACTERIZATION OF NANOCRYSTALLINE FeNi AND Ni3Fe ALLOYS

2011 ◽  
Vol 25 (07) ◽  
pp. 1013-1019 ◽  
Author(s):  
S. AZADEHRANJBAR ◽  
F. KARIMZADEH ◽  
M. H. ENAYATI
Keyword(s):  
Ball Mill ◽  
Morphological Evolution ◽  
Lattice Parameter ◽  
Internal Stresses ◽  
Alloy Formation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Powder Particles ◽  
Fe Alloys

Nanocrystalline FeNi and Ni 3 Fe alloys were prepared by mechanical alloying of Fe and Ni elemental powders using a planetary ball mill under protection atmosphere. X-ray diffraction measurements were performed to follow alloy formation process in these alloys. A heat treatment of 1 h at 800°C was carried out to relax the internal stresses of the milled samples. Morphological evolution of powder particles was revealed by scanning electron microscopy. The value of lattice parameter was reached to 0.35762 nm and the hardness was found to be 686 HV at 30 h milled FeNi powder. In the case of Ni 3 Fe the values of 0.3554 nm and 720 HV were obtained for lattice parameter and hardness, respectively.

Catalytic performance and characterization of Pd/Ni0.2Mg0.8Al2O4 in oxidative steam reforming of methane under atmospheric and pressurized conditions

2007 ◽  
Vol 325 (1) ◽  
pp. 154-162 ◽  
Author(s):  
Mohammad Nurunnabi ◽  
Yuya Mukainakano ◽  
Shigeru Kado ◽  
Toshihiro Miyao ◽  
Shuichi Naito ◽  
...  
Keyword(s):  
Steam Reforming ◽  
Catalytic Performance ◽  
Steam Reforming Of Methane

Promoting effect of trace Pd on hydrotalcite-derived Ni/Mg/Al catalyst in oxidative steam reforming of biomass tar

2015 ◽  
Vol 179 ◽  
pp. 412-421 ◽  
Author(s):  
Jinhai Chen ◽  
Masazumi Tamura ◽  
Yoshinao Nakagawa ◽  
Kazu Okumura ◽  
Keiichi Tomishige
Keyword(s):  
Steam Reforming ◽  
Promoting Effect ◽  
Biomass Tar

scholarly journals Synthesis and Characterization of Co/Ni/CoNi-ZSM-5 Catalyst for Hydrogen Production

2018 ◽  
Vol 156 ◽  
pp. 06013
Author(s):  
Widayat Widayat ◽  
Arianti Nuur Annisa ◽  
Hantoro Satriadi ◽  
Syaiful Syaiful
Keyword(s):  
Hydrogen Production ◽  
Steam Reforming ◽  
Hydrothermal Process ◽  
Coke Formation ◽  
Nickel Catalysts ◽  
Catalyst Synthesis ◽  
Cobalt Nickel ◽  
Crystalline Product ◽  
Production Of Hydrogen

Nickel is commonly used as a catalyst in hydrogen production. However, the use of nickel catalysts in the steam reforming process has the disadvantage of coke formation and high cost. Therefore, in this research, Ni/ZSM-5 catalyst synthesis was used to reduce production cost and an addition of cobalt (Co) metal to avoid coke formation. The method consists of a synthesis of ZSM-5 catalyst using hydrothermal process. Furthermore, the crystalline product was impregnated with the metal cobalt, nickel and combination of cobalt-nickel as much as 2% by weight metal/weight of the catalyst. Then the XRD and EDX characterization of Co/ZSM-5, Ni/ZSM-5, and CoNi/ZSM-5 was done followed by catalytic testing in the production of hydrogen from glycerol using steam reforming process. From XRD characterization results showed that Co/ZSM-5 catalyst has a crystallinity of 78.69%, Ni/ZSM-5 catalyst has 70.04% crystallinity and CoNi/ZSM-5 catalyst has 76.99% crystallinity. Catalytic testing on hydrogen production showed that CoNi/ZSM-5 catalyst produced the highest hydrogen concentration of 1,756.33 ppm while Ni/ZSM-5 catalyst produces 1,240 ppm and Co/ZSM-5 catalyst produces 491 ppm.

scholarly journals A Review on Catalysts Development for Steam Reforming of Biodiesel Derived Glycerol; Promoters and Supports

Catalysts ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 910 ◽  
Author(s):  
Nasim Ghaffari Saeidabad ◽  
Young Su Noh ◽  
Ali Alizadeh Eslami ◽  
Hyun Tae Song ◽  
Hyun Dong Kim ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Hydrogen Production ◽  
Steam Reforming ◽  
Review Paper ◽  
Coke Formation ◽  
Value Added ◽  
Catalytic Performance ◽  
Process Conditions ◽  
Primary Concern ◽  
Glycerol Conversion

In the last decades, environmental crises and increasing energy demand have motivated researchers to investigate the practical techniques for the production of clean fuels through renewable energy resources. It is essential to develop technologies to utilize glycerol as a byproduct derived from biodiesel. Glycerol is known as a sustainable and clean source of energy, which can be an alternative resource for the production of value-added chemicals and hydrogen. The hydrogen production via steam reforming (SR) of glycerol using Ni-based catalysts is one of the promising approaches for the entry of the hydrogen economy. The purpose of this review paper is to highlight the recent trends in hydrogen production over Ni-based catalysts using the SR of glycerol. The intrinsic ability of Ni to disperse easily over variable supports makes it a more viable active phase for the SR catalysts. The optimal reaction conditions have been indicated as 650–900 °C, 1 bar, and 15 wt% Ni in catalysts for high glycerol conversion. In this review paper, the effects of various supports, different promoters (K, Ca, Sr, Ce, La, Cr, Fe), and process conditions on the catalytic performance have been summarized and discussed to provide a better comparison for the future works. It was found that Ce, Mg, and La have a significant effect on catalytic performance as promoters. Moreover, SR of glycerol over hydrotalcite and perovskite-based catalysts have been reviewed as they suggest high catalytic performance in SR of glycerol with improved thermal stability and coke resistance. More specifically, the Ni/LaNi0.9Cu0.1O3 synthesized using perovskite-type supports has shown high glycerol conversion and sufficient hydrogen selectivity at low temperatures. On the other hand, hydrotalcite-like catalysts have shown higher catalytic stability due to high thermal stability and low coke formation. It is vital to notice that the primary concern is developing a high-performance catalyst to utilize crude glycerol efficiently.

scholarly journals The characterization of NiO-CoO/MgO catalyst for autothermal reforming of methane

2018 ◽  
Vol 4 (2) ◽  
pp. 191
Author(s):  
Tutuk Djoko Kusworo ◽  
A R Songip ◽  
N A. Saidina Amin
Keyword(s):  
Steam Reforming ◽  
Coke Formation ◽  
Autothermal Reforming ◽  
Impregnation Method ◽  
Carbon Formation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Temperature Programmed ◽  
Tga Analysis

The characterization of NiO-CoO/MgO catalyst for autothermal reforming of methaneThe drawback of conventional reforming of methane such as partial oxidation and steam reforming was carbon formation. The research was developed a suitable catalyst for combination of partial and steam reforming of methane and called autothermal reforming to reduce the coke formation. The NiO-CoO/MgO catalysts were prepared by an impregnation method and characterized by Temperature Programmed Reduction (TPR), X-ray Diffraction (XRD) and Thermal Gravitymetry Analysis (TGA). The TPR and XRD results reveal that the catalyst characteristic is strongly influenced by the Co/Ni ratio. From TPR and TGA analysis, the sintering phenomena did not occur in the autothermal reforming of methane. The results reveal that Co/Ni ratios have a small effect in the catalytic activity for autothermal reforming. Nevertheless, the catalyst showed an optimum performance in this process when its Co/Ni ratio was 0.75. Keywords: Autothermal ReformingAbstrakMasalah yang terjadi pada proses konvensional reformasi metana seperti oksidasi parsial metana dan reformasi kukus adalah pembentukan karbon. Penelitian yang dilakukan adalah mengembangkan katalis yang sesuai untuk gabungan proses oksidasi parsial dan reformasi kukus atau yang disebut reformasi metana secara autothermal. Katalis NiO-CoO/MgO yang digunakan dibuat dengan metode impregnasi dan dilakukan pengujian dengan TPR, XRD dan TGA untuk mengetahui sifat-sifat dari katalis tersebut. Hasil TPR dan XRD menunjukkan bahwa karakteristik dari katalis sangat dipengaruhi oleh perbandingan CoiN i. Hasil pengamatan TPR dan TGA menunjukan bahwa sintering tidak terjadi di dalam proses reformasi metana secara autothermal. Hasil eksperimen juga menunjukan bahwa perbandingan Co/Ni hanya kecil pengaruhnya pada unjuk kerja katalis. Namun demikian katalis menunjukan unjuk kerja yang optimum pada perbandingan CoiN i = 0.75. Kata Kunci: Reformasi Autothermal

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