Ni/Ru–Mn/Al2O3 catalysts for steam reforming of toluene as model biomass tar

Oh, Gunung; Park, Ga Young; Seo, Myung Won; Kim, Yong Ku; Won, Ho; Lee, Jae-Goo; Yoon, Sang Jun

doi:10.1016/j.renene.2015.09.013

Cited by 80 publications

(30 citation statements)

References 27 publications

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“…Coke deposition on catalysts is the most significant influencing factor of catalytic activity of the metallic active sites and can block partial support pores affecting the active surface . The specific surface area of the catalyst was decreased after the catalytic reactions (Table ) because pores of the catalysts were blocked by coke deposition . However, the decrease in the specific surface area varied with the catalytic temperatures.…”

Section: Resultsmentioning

confidence: 99%

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Experimental study on catalytic effect of biomass pyrolysis volatile over nickel catalyst supported by waste iron slag

Shen

et al. 2017

Int J Energy Res

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Summary The study aims to analyze catalytic tar destruction, evaluate the activity of the Ni‐based catalyst supported by waste iron slag, and obtain clean pyrolysis syngas. The effects of different nickel loadings, catalytic temperatures, and catalyst calcination temperatures on volatile were investigated in order to determine the optimal process condition. The analysis results showed that the iron slag Ni‐based catalyst had a relatively low specific surface area. However, it showed an excellent resistance performance to the coke deposition and displayed the high tar removal ability. Moreover, the tar conversion and the yield of syngas were significantly affected by nickel loadings. When the nickel loading reached 3%, the tar dew point was decreased by nearly 100 °C and the tar conversion reached 94.84%. The favorable reaction temperature was about 800 °C based on the consideration of energy consumption and the catalytic performance. Calcination temperature affected tar yield and syngas yield. The application of iron slag in nickel catalyst realized the reutilization of waste materials, indicating significant practical values. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 99%

“…As a kind of potential renewable energy, biomass energy can replace partial fossil fuels, mitigate the greenhouse effect, and relieve climate change and other issues . Pyrolysis and gasification are most widely used to produce a syngas rich in H 2 and CO for the utilization of biomass energy .…”

Section: Introductionmentioning

confidence: 99%

Experimental study on catalytic effect of biomass pyrolysis volatile over nickel catalyst supported by waste iron slag

Shen

et al. 2017

Int J Energy Res

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“…A higher S/C ratio also increased toluene conversion to gas. Some researchers suggested that the most suitable S/C ratio was mostly between 2.5 and 3.5, because more excess steam would not increase toluene conversion or H 2 production, causing a drop in toluene partial pressure [26]. Table 5 compares the product yields of CO, CO 2 and H 2 with different S/C ratios.…”

Section: Influence Of S/c Ratio In Toluene Steam Reformingmentioning

confidence: 99%

“…Methane reforming followed by a water-gas shift reaction converts the produced CO with steam to H 2 and CO 2 . A Boudouard reaction is an exothermic reaction that produces C from CO. All of these reactions are heavily conditioned by the temperature, space velocity and reactants ratio [26][27][28]. Hence, a careful assessment of the impact of these parameters will allow us to identify the optimum conditions towards the generation of added value products.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Steam Reforming of Toluene: Understanding the Influence of the Main Reaction Parameters over a Reference Catalyst

2020

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Identifying the suitable reaction conditions is key to achieve high performance and economic efficiency in any catalytic process. In this study, the catalytic performance of a Ni/Al2O3 catalyst, a benchmark system—was investigated in steam reforming of toluene as a biomass gasification tar model compound to explore the effect of reforming temperature, steam to carbon (S/C) ratio and residence time on toluene conversion and gas products. An S/C molar ratio range from one to three and temperature range from 700 to 900 °C was selected according to thermodynamic equilibrium calculations, and gas hourly space velocity (GHSV) was varied from 30,600 to 122,400 h−1 based on previous work. The results suggest that 800 °C, GHSV 61,200 h−1 and S/C ratio 3 provide favourable operating conditions for steam reforming of toluene in order to get high toluene conversion and hydrogen productivity, achieving a toluene to gas conversion of 94% and H2 production of 13 mol/mol toluene.

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“…During Petrobras gasification studies at pilot scale using sugarcane bagasse as feedstock, the production of 7.4 g N −1 m −3 of tar (best results) and a high content of methane (6.20 %) and olefins (2.75 % ethylene and 0.37 % propene) in the syngas was experimentally verified, which contribute to the accelerated deactivation of the catalysts. Another concern is the presence of H 2 S, in the range of 20–110 ppm, which represents a high value in relation to the minimum admissible for nickel catalysts (up to 15 ppm) . All these concerns led to the process development using noble metals supported on materials with higher thermal and hydrothermal stability, and also explain why some authors use these more expensive materials on tar removal catalysts in spite of their high cost .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Operational Cycles for Long‐Term Run of a Tar Removal Catalytic System

et al. 2019

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Biomass gasification experiments on pilot/demo scales have some issues related to the early deactivation of catalysts during the tar removal step. To avoid this problem, a method was developed in a bench-scale micro activity unit using toluene as tar model compound in order to suppress this effect. The runs were performed with a commercial Pt catalyst supported on Ce-Zr-Al, alternating periods of regeneration and reactivation steps with steam, nitrogen, and hydrogen. The toluene steam reforming using operational cycles in order to reach a long-term run provided useful information for pilot plant studies, mainly reactivation and regeneration procedures. The main concern on tar removal studies by steam reforming is the catalyst deactivation due to the presence of polyaromatic and olefinic compounds on the material pores, which is produced during biomass gasification.

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Ni/Ru–Mn/Al2O3 catalysts for steam reforming of toluene as model biomass tar

Cited by 80 publications

References 27 publications

Experimental study on catalytic effect of biomass pyrolysis volatile over nickel catalyst supported by waste iron slag

Experimental study on catalytic effect of biomass pyrolysis volatile over nickel catalyst supported by waste iron slag

Catalytic Steam Reforming of Toluene: Understanding the Influence of the Main Reaction Parameters over a Reference Catalyst

Evaluation of Operational Cycles for Long‐Term Run of a Tar Removal Catalytic System

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