Catalytic pyrolysis of biomass: Effects of pyrolysis temperature, sweeping gas flow rate and MgO catalyst

Pütün, Ersan

doi:10.1016/j.energy.2010.02.024

Cited by 240 publications

(74 citation statements)

References 17 publications

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“…Decline in the bio-oil yield was observed with nitrogen flow between 40 to 60 mL/min. This could be as a result of short vapor residence time in the condenser coil which has contributed to yield more non-condensable gas (Uzun et al 2007;Pütün 2010;Keles et al 2011;Soetardji et al 2014). Generally, an increase in the yield of non-condensable gas was observed with increasing nitrogen flow, while bio-char yield decreased due to the rapid removal of pyrolysis vapor from the reaction zone.…”

Section: Effects Of Nitrogen Flow Rate and Reaction Temperature On Pymentioning

confidence: 93%

Pyrolysis of Napier Grass in a Fixed Bed Reactor: Effect of Operating Conditions on Product Yields and Characteristics

Mohammed

Abakr

Kazi

et al. 2015

BioRes

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This study presents a report on pyrolysis of Napier grass stem in a fixed bed reactor. The effects of nitrogen flow (20 to 60 mL/min), and reaction temperature (450 to 650 °C) were investigated. Increasing the nitrogen flow from 20 to 30 mL/min increased the bio-oil yield and decreased both bio-char and non-condensable gas. 30 mL/min nitrogen flow resulted in optimum bio-oil yield and was used in the subsequent experiments. Reaction temperatures between 450 and 600 °C increased the bio-oil yield, with maximum yield of 32.26 wt% at 600 o C and a decrease in the corresponding bio-char and non-condensable gas. At 650 °C, reductions in the bio-oil and bio-char yields were recorded while the non-condensable gas increased. Water content of the bio-oil decreased with increasing reaction temperature, while density and viscosity increased. The observed pH and higher heating values were between 2.43 to 2.97, and 25.25 to 28.88 MJ/kg, respectively. GC-MS analysis revealed that the oil was made up of highly oxygenated compounds and requires upgrading. The bio-char and non-condensable gas were characterized, and the effect of reaction temperature on the properties was evaluated. Napier grass represents a good source of renewable energy when all pyrolysis products are efficiently utilized..

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Section: Effects Of Nitrogen Flow Rate and Reaction Temperature On Pymentioning

confidence: 93%

Pyrolysis of Napier Grass in a Fixed Bed Reactor: Effect of Operating Conditions on Product Yields and Characteristics

Mohammed

Abakr

Kazi

et al. 2015

BioRes

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“…Unlike gasification, pyrolysis process consists of a thermal degradation of the initial solid biomass into gases and liquids without an oxidizing agent [21,26]. The products of biomass pyrolysisprimarily consist of biochar, bio-oil and gases including CH 4 , H 2 , CO and CO 2 [27,28]. Pyrolysis offers a flexible and attractive way of converting solid biomass into an easily stored and transported liquid fuels [29].…”

Section: Introductionmentioning

confidence: 99%

Catalytic reactions of gamma-valerolactone: A platform to fuels and value-added chemicals

Yan

Yang

Chai

et al. 2015

Applied Catalysis B: Environmental

399

217

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“…However, some recent studies on crop stems (Stals et al, 2010), wood (French & Czernik, 2010) and coconut shells (Siengchum, Isenberg, & Chuang, 2013) have demonstrated the use of fixed-bed batch reactors for HHR pyrolysis. Moreover, a typical HHR pyrolysis is performed with a short vapor residence time of 1-5 s, while some studies reveal residence times of 30-88 s in the pyrolysis of rise husk (Tsai, Lee, & Chang, 2007) and cotton seed (Putun, 2010) in fixed-bed reactors. Based on these investigations, the current study employs a fixed-bed reactor for both SHR and HHR pyrolysis of lignocellulosic biomass from herbaceous (wheat straw, timothy grass) and forestry (pinewood) resources.…”

Section: Introductionmentioning

confidence: 99%

Physico-Chemical Properties of Bio-Oils from Pyrolysis of Lignocellulosic Biomass with High and Slow Heating Rate

Nanda¹,

Mohanty²,

Koziński³

et al. 2014

EER

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Bio-oil is a major product of biomass pyrolysis that could potentially be used in motor engines, boilers, furnaces and turbines for heat and power. Upon catalytic upgrading, bio-oils can be used as transportation fuels due to enhancement of their fuel properties. In this study, bio-oils produced from lignocellulosic biomasses such as wheat straw, timothy grass and pinewood were estimated through slow and high heating rate pyrolysis at 450 °C. The slow heating rate (2 °C/min) pyrolysis resulted in low bio-oil yields and high amount of biochars, whereas the high heating rate (450 °C/min) pyrolysis produced significant amount of bio-oils with reduced biochar yields. The physico-chemical and compositional analyses of bio-oils were achieved through carbon-hydrogen-nitrogen-sulfur (CHNS) studies, calorific value, Fourier transform-infra red (FT-IR) spectroscopy, gas chromatography-mass spectrometry (GC-MS), electrospray ionization-mass spectrometry (ESI-MS) and nuclear magnetic resonance (NMR) spectroscopy. The yields of bio-oils produced from the three biomasses were 40-48 wt.% through high heating rate pyrolysis and 18-24 wt.% through slow heating rate pyrolysis. The chemical components identified in bio-oils were classified into five major groups such as organic acids, aldehydes, ketones, alcohols and phenols. The percent intensities of hydrogen and carbon containing species were calculated from 1 H and 13 C-NMR. The study on bio-oils from herbaceous and woody biomasses revealed their potentials for fossil fuel substitution and bio-chemical production.

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Catalytic pyrolysis of biomass: Effects of pyrolysis temperature, sweeping gas flow rate and MgO catalyst

Cited by 240 publications

References 17 publications

Pyrolysis of Napier Grass in a Fixed Bed Reactor: Effect of Operating Conditions on Product Yields and Characteristics

Pyrolysis of Napier Grass in a Fixed Bed Reactor: Effect of Operating Conditions on Product Yields and Characteristics

Catalytic reactions of gamma-valerolactone: A platform to fuels and value-added chemicals

Physico-Chemical Properties of Bio-Oils from Pyrolysis of Lignocellulosic Biomass with High and Slow Heating Rate

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