Ni-Ce/SiO<sub>2</sub> nanocomposite: Characterization and catalytic activity in the cracking of tar in biomass gasifiers

Shanmuganandam, K.; Ramanan, M. Venkata

doi:10.1080/15567036.2015.1062826

Cited by 8 publications

(5 citation statements)

References 15 publications

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“…Such a uniform distribution also implied that an alloy of NiMo was formed ( Wang et al, 2013 ). These better morphologies are rare in Ni-based catalysts made by gas reduction ( Shanmuganandam and Ramanan, 2016 ; Wu et al, 2019b ). In our preparation, proper metal loading based on the support and stable conditions contributed to this result together.…”

Section: Resultsmentioning

confidence: 99%

Alloying effect of Ni-Mo catalyst in hydrogenation of N-ethylcarbazole for hydrogen storage

et al. 2022

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Liquid organic hydrogen storage with N-ethylcarbazole (NEC) as a carrier is a very promising method. The use of precious metal hydrogenation catalysts restricts the development in industrial grade. Efficient and low-cost hydrogen storage catalysts are essential for its application. In this work, a Ni-Mo alloy catalyst supported by commercial activated carbon was synthesized by impregnation method, and the Ni-Mo ratio and preparation conditions were optimized. The catalyst was characterized by XRD, XPS, H2-TPR, SEM, and TEM. The results showed that the doping of Mo could dramatically promote the catalytic hydrogenation of N-ethylcarbazole by the Ni-based catalyst. More than 5.75 wt% hydrogenation could be achieved in 4 h using the Ni-Mo catalyst, and the selectivity of the fully hydrogenated product 12H-NEC could be effectively improved. This result reduces the cost of hydrogenation catalysts by more than 90% and makes liquid organic hydrogen storage a scaled possibility.

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Section: Resultsmentioning

confidence: 99%

Alloying effect of Ni-Mo catalyst in hydrogenation of N-ethylcarbazole for hydrogen storage

et al. 2022

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“…But, liquid water produced as the result of the methanation reaction increased from 12 wt.% to 39 wt.% with the increase in catalytic hydrogenation temperature which showed the 404 promotion of the methanation reactions (Eqs. [10][11]. Table shows that the percentage 405 carbon content in the product gases remained roughly the same at all the catalytic 406 hydrogenation temperatures studied because the carbon from gaseous CO2 and CO was 407 converted into gaseous CH4.…”

Section: Figurementioning

confidence: 96%

“…Also, different support materials such as Al2O3, SiO2, MCM-41, zeolites, and dolomite etc. have been reported in the literature to be active for steam reforming reactions [5,[10][11][12][13].…”

Section: Takedownmentioning

confidence: 99%

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Synthetic natural gas production from the three stage (i) pyrolysis (ii) catalytic steam reforming (iii) catalytic hydrogenation of waste biomass

Jaffar

Nahil

Williams

2020

Fuel Processing Technology

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“…Another common method of tar cracking is the thermal cracking. In this method, high temperature of > 1100°C is required to achieve tar cracking but it results in substantial energy penalty [9] (Shanmuganandam and Ramanan, 2016).…”

Section: Introductionmentioning

confidence: 99%

Ex-situ catalytic cracking of gasifier tar using Ni-loaded pigeonpea stalk char catalyst

Mandal

Jena

Gangil

et al. 2022

Preprint

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Purpose Tar in producer gas causes detrimental effects in downstream pipelines in gasifier based power generation system. Ni-supported char based catalysts have been proven to be effective and low-cost solution for cracking of tar. Use of simple method to make the catalyst with locally available biomaterial and its optimization can effectively solve this problem. Methods This paper includes efficacy of ex-situ catalytic cracking temperature, Ni-loading, particle size of char catalyst and catalyst bed depth on cracking efficiency. Producer gas generated from pigeonpea stalk pellets using a laboratory scale downdraft gasifier was passed through a hot catalyst bed in an ex-situ reactor. Taguchi method was used for de-compositional analysis of the variables affecting tar-cracking efficiency. Results Experiments showed increase in cracking efficiency with increasing temperature, Ni loading, bed depth and with decrease in particle size. Optimum values of operating parameters were 700 °C catalyst bed temperature, 0.3 M Ni loading, 5–10 mm particle size and 400 mm bed depth. Improvement in gas composition with the increase in Ni-loading was observed. Conclusion These findings confirmed that using pigeonpea stalk char supported with Ni, tar in producer gas can be decomposed to the tune of 84% at 600°C which can be easily achievable at the peripheral space of oxidation zone in a downdraft gasifier. With further increase in temperature to 700°C and using low size of 1–5 mm catalysts cracking efficiency can be achieved up to 93%. Catalytic cracking also improved the quality of producer gas.

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Ni-Ce/SiO₂ nanocomposite: Characterization and catalytic activity in the cracking of tar in biomass gasifiers

Cited by 8 publications

References 15 publications

Alloying effect of Ni-Mo catalyst in hydrogenation of N-ethylcarbazole for hydrogen storage

Alloying effect of Ni-Mo catalyst in hydrogenation of N-ethylcarbazole for hydrogen storage

Synthetic natural gas production from the three stage (i) pyrolysis (ii) catalytic steam reforming (iii) catalytic hydrogenation of waste biomass

Ex-situ catalytic cracking of gasifier tar using Ni-loaded pigeonpea stalk char catalyst

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Ni-Ce/SiO2 nanocomposite: Characterization and catalytic activity in the cracking of tar in biomass gasifiers

Cited by 8 publications

References 15 publications

Alloying effect of Ni-Mo catalyst in hydrogenation of N-ethylcarbazole for hydrogen storage

Alloying effect of Ni-Mo catalyst in hydrogenation of N-ethylcarbazole for hydrogen storage

Synthetic natural gas production from the three stage (i) pyrolysis (ii) catalytic steam reforming (iii) catalytic hydrogenation of waste biomass

Ex-situ catalytic cracking of gasifier tar using Ni-loaded pigeonpea stalk char catalyst

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Ni-Ce/SiO₂ nanocomposite: Characterization and catalytic activity in the cracking of tar in biomass gasifiers