Co-gasification of beech-wood and polyethylene in a fluidized-bed reactor

Zhu, Hua Lun; Zhang, Ye Shui; Materazzi, Massimiliano; Aranda, Gabriela N.; Brett, Dan J. L.; Shearing, Paul R.; Manos, George

doi:10.1016/j.fuproc.2019.03.010

Cited by 61 publications

(28 citation statements)

References 42 publications

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“…When reforming is envisaged as a downstream tar upgrading unit after gasification, the most interesting temperature interval for atmospheric reforming is between 600 and 900 • C, since the gasification effluent temperature will normally be lower than 900 • C [33]. Research also suggested that high temperature might reduce H 2 yield as the reverse water-gas shift reaction is favoured due to its endothermic nature [34][35][36]. The experiments were conducted at different temperatures to investigate the most suitable conditions for toluene conversion and H 2 production.…”

Section: Influence Of Temperature On Toluene Steam Reformingmentioning

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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Section: Influence Of Temperature On Toluene Steam Reformingmentioning

confidence: 99%

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

2020

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“…One of the major indicators for why very little biomass waste is used in comparison to other renewable technologies is the ash constituents present in the waste feedstock. This is variable depending on the type of lignocellulosic biomass waste used; wood based examples include pine, eucalyptus, oak, poplar, beech wood, , or olive kernel wood . Other nonwood includes herbaceous wastes such as wheat straw, sugar cane straw, switchgrass, and bagasse …”

Section: Introductionmentioning

confidence: 99%

Augmented Leaching Pretreatments for Forest Wood Waste and Their Effect on Ash Composition and the Lignocellulosic Network

Taylor

Alabdrabalameer

Michopoulos

et al. 2020

ACS Sustainable Chem. Eng.

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By augmenting conventional leaching technologies for the removal of ash constituents from lignocellulosic waste residues, a cleaner and energy efficient solution can be provided for critical industrial problems such as biomass feeding, defluidization, and reactor corrosion. It has been found that not only are inorganic constituents (ash) effectively removed by coupling a physicochemical technology with conventional leaching but also the intermolecular interactions within the lignocellulosic matrix can be modified, as shown by a variable crystallinity index (powder X-ray diffraction) without the loss of physical bonding (Fourier-transform infrared spectroscopy). Ultimately, this allowed for a greater thermochemical transformation of cellulose, hemicellulose, and lignin for all technologies used: conventional leaching, indirect/directed ultrasound, and microwave irradiation. However, the use of directed ultrasound was found to be the standout, energy efficient technology (8.6 kJ/g) to radically improve the thermochemical transformation of wood waste, especially in the reduction of fixed carbon at high temperatures. It was also found to be efficient at removing vital eutectic mixture causing elements, including Si, which is known to be notoriously difficult to remove via leaching. In comparison, hot plate leaching and microwave irradiation use 39 and 116 times more energy, respectively. The integration of this technology into the energy production sector will prove vital in the future due to its scalability, as compared with microwave alternatives, which are currently not suitable for large scale operations. Additionally, the residence time required for directed ultrasound was found to be negligible as compared to the various other physicochemical techniques, 0.1 h opposed to 4 h.

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“…In order to inhibit the phenomena of bed particle agglomeration, which leads to defluidisation of the bed, BFB reactors should operate at temperatures lower than the fuel's ash melting temperature (Samiran et al, 2016). Zhu et al (2019) studied the co-gasification of polyethylene and beech wood in a lab-scale fluidised bed reactor. In particular, they investigated the effect of steam injection, feedstock composition and bed material on the hydrogen production.…”

Section: Bubbling Fluidised Bed Reactormentioning

confidence: 99%

Fluidised Bed Reactors for the Thermochemical Conversion of Biomass and Waste

Iannello

Morrin

Materazzi

2020

KONA

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The growing population and economic development globally has led to increasing resource consumption and waste generation. This has generated concern at local, national and international levels on environmental issues including air quality, resource scarcity, waste management (including plastics) and global warming. The resulting antipathy towards fossil fuels and waste landfilling has spurred the demand for alternative bioenergy and biofuels production methods, making use of abundant biomass and waste feedstock. Although not new concepts, there has been renewed impetus recently to develop advanced thermochemical processes such as pyrolysis and gasification to treat biomass and municipal solid waste (including refuse-derived fuel therefrom). This is because these processes have the potential to add value to cheap and abundant materials by converting them into advanced biofuels and chemicals. The work presented in this paper is concerned principally with the technical analysis and review of new-generation, state-of-the-art systems based on fluidised bed reactors operated with biomass and solid waste. A comprehensive assessment of fluidised bed reactor types and operations is considered, with particular attention given to those processes aimed at the production of clean syngas for the subsequent synthesis of high-value products, including bio-hydrogen, synthetic natural gas (SNG), and liquid fuels.

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Co-gasification of beech-wood and polyethylene in a fluidized-bed reactor

Cited by 61 publications

References 42 publications

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

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

Augmented Leaching Pretreatments for Forest Wood Waste and Their Effect on Ash Composition and the Lignocellulosic Network

Fluidised Bed Reactors for the Thermochemical Conversion of Biomass and Waste

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