Characteristics of rice husk tar pyrolysis by external flue gas

Zhai, Ming; Wang, Xinyu; Yu, Zhonghua; Dong, Peng; Qi, Guoli

doi:10.1016/j.ijhydene.2015.07.045

Cited by 20 publications

(6 citation statements)

References 23 publications

(20 reference statements)

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“…High biooil yield up to 75 % can be obtained under a careful control of process parameters [10][11][12]. Studies on pyrolysis of RH to bio-oil have been carried out by many researchers [13][14][15][16][17][18][19][20][21][22][23][24]. Bio-oil yields between 25 and 38 wt% rich in acid and ketones are mostly recorded during the pyrolysis of RH at around 600°C [15,16,19,[21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…Studies on pyrolysis of RH to bio-oil have been carried out by many researchers [13][14][15][16][17][18][19][20][21][22][23][24]. Bio-oil yields between 25 and 38 wt% rich in acid and ketones are mostly recorded during the pyrolysis of RH at around 600°C [15,16,19,[21][22][23][24]. Catalytic pyrolysis is also being used towards improving the oil quality from RH, and a considerable degree of deoxygenation is achieved at the detriment of oil yield [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

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Co-pyrolysis of Rice Husk with Underutilized Biomass Species: A Sustainable Route for Production of Precursors for Fuels and Valuable Chemicals

Mohammed

Lim

Kazi

et al. 2016

Waste Biomass Valor

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In this study, co-pyrolysis of rice husk with underutilized biomass, Napier grass and sago waste was carried out in a fixed bed reactor at 600°C, 30°C/min and 5 L/min nitrogen flowrate. Two-phase bio-oil (organic and aqueous) was collected and characterized using standard analytical techniques. 34.13-45.55 wt% total boil-oil yield was recorded using assorted biomass compared to pure risk husk biomass with 31.51 wt% yield. The organic phase consist mainly benzene derivatives with higher proportion in the oil from the co-pyrolysis process relative to the organic phase from the pyrolysis of the individual biomass while the aqueous phase in all cases was predominantly water, acids, ketones, aldehydes, sugars and traces of phenolics. This study has demonstrated a good approach towards increasing valorization of rice husk in a single reaction step for the production of high grade bio-oil, which can be transformed into fuel and valuable chemicals.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Co-pyrolysis of Rice Husk with Underutilized Biomass Species: A Sustainable Route for Production of Precursors for Fuels and Valuable Chemicals

Mohammed

Lim

Kazi

et al. 2016

Waste Biomass Valor

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“…Kadar fenol tertinggi pada sampel cuka kayu hasil evaporasi yaitu sebesar 0,7%. Kadar fenol pada penelitian ini lebih rendah dibandingkan pada penelitian Zhai et al, (2015), kadar fenol yang dihasilkan berkisar antara 1,297-4,652% pada suhu pirolisis yang berbeda. Semakin tinggi suhu dan semakin lama waktu pirolisis maka kadar fenol yang dihasilkan semakin tinggi.…”

Section: Kadar Fenolunclassified

Identifikasi Kandungan Senyawa Kimia Cuka Kayu dari Sekam Padi

Nugrahaini

Kusdiyantini

Tarwotjo

et al. 2017

Bioma

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Wood vinegar rice husk contains a chemical compound that can be used as a biopesticides. Wood vinegar contained compounds which estimated potential as repellent, antifeedant, antimicrobials, antioxidants, disinfectants and as preservatives. The content of chemical compounds in the wood vinegar must be identified. Identification were done by calculating the concentration of acid, phenol and an infrared spectrophotometer. Production of wood vinegar made by the pyrolysis process used pirolisator. Most of the wood vinegar obtained is evaporated using a rotary evaporator and partly extracted using the method of separating funnel. Compound of acid and phenol in wood vinegar evaporation were higher than the extraction of wood vinegar. These results were confirmed by an infrared spectrophotometer spectrum showed the functional groups of acid and phenolic compounds. Keywords: wood vinegar rice husk, acid, phenol, pyrolysis, infrared spetrofotometer

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“…Many studies revealed the effect of pyrolysis temperature on tar composition and pyrolysis product yield. 15,16 Nevertheless, none of the studies focused on the effect of tar composition on the catalytic performance of the char in tar decomposition or tar steam reforming. Consequently, in this work, the steam reforming of biomassderived tar over the pyrolysis char was conducted in a twostage fixed-bed reactor.…”

Section: Introductionmentioning

confidence: 99%

“…In the first step, parameters such as temperature, residence time, and biomass type are the important factors that determine the tar composition. Many studies revealed the effect of pyrolysis temperature on tar composition and pyrolysis product yield. , Nevertheless, none of the studies focused on the effect of tar composition on the catalytic performance of the char in tar decomposition or tar steam reforming.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Steam Reforming of Biomass-Derived Tar over the Coal/Biomass Blended Char: Effect of Devolatilization Temperature and Biomass Type

Mueangta¹,

Kuchonthara²,

Krerkkaiwan

2019

Energy Fuels

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Catalytic tar steam reforming over char was conducted in a two-stage fixed-bed reactor. This reactor was divided into two zones: the "devolatilization zone", where the biomass tar is released, and the "tar reforming zone", where the tar and char are contacted and reformed into products. The temperature of the tar reforming zone was maintained at 800 °C for all experiments. The effects of devolatilization temperature (600, 700, and 800 °C) and biomass type (rice straw, RS, and Leucaena leucocephala wood, LN) on the catalytic performance of char during tar steam reforming were investigated. Biomass chars and coal/biomass blended chars (C/RS and C/LN) were prepared as the catalyst for tar steam reforming. Results revealed that compared with biomass chars, C/RS and C/LN performed a better catalytic activity in tar steam reforming, resulting in a higher carbon conversion into gas and a lower carbon conversion into tar. The main catalytic roles of the coal/biomass blended char can be explained by the improvement of the Brunauer−Emmett−Teller (BET) surface area during co-pyrolysis and the existence of alkali and alkaline earth metallic species (AAEMs), particularly K, as the stable silicate form. Considering the effect of devolatilization temperature, the tar released at 700 °C can be mostly converted among all types of char. Tars containing the mixture of phenolic compounds (i.e., phenol and methyl phenol) and aromatic compounds (i.e., naphthalene and methyl naphthalene) were favorable to reform over the char surface to achieve the relatively high tar conversion. In addition, LN tar was easier to convert than the RS tar in both cases of with and without char because of the lower proportion of a stable aromatic compound. The outcome of this study can be beneficial for the design and operation of the tar removal process during biomass gasification using the low-cost carbon-based catalyst.

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Characteristics of rice husk tar pyrolysis by external flue gas

Cited by 20 publications

References 23 publications

Co-pyrolysis of Rice Husk with Underutilized Biomass Species: A Sustainable Route for Production of Precursors for Fuels and Valuable Chemicals

Co-pyrolysis of Rice Husk with Underutilized Biomass Species: A Sustainable Route for Production of Precursors for Fuels and Valuable Chemicals

Identifikasi Kandungan Senyawa Kimia Cuka Kayu dari Sekam Padi

Catalytic Steam Reforming of Biomass-Derived Tar over the Coal/Biomass Blended Char: Effect of Devolatilization Temperature and Biomass Type

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