Conversion of Japanese red pine wood (Pinus densiflora) into valuable chemicals under subcritical water conditions

Asghari, Feridoun Salak; Yoshida, Hiroyuki

doi:10.1016/j.carres.2009.10.006

Cited by 65 publications

(44 citation statements)

References 28 publications

(22 reference statements)

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“…In Figure 8.91 on the right-hand side, water-soluble products, acetone-soluble products, and water-acetoneinsoluble products, which can be attributed mainly to the degraded lignin, tar, and unreacted wood chips, respectively, are shown. Water-soluble products reach about 70 wt% after t ¼ 15 min of treatment, acetone-soluble products are mainly at a level of about 20 wt%, and acetone-water-insoluble products decrease to less than 10 wt% after t ¼ 15 min at T ¼ 270 C [118]. Treatment of sugi (Cryptomeria japonica D. Don) wood in hightemperature water at T ¼ 310-320 C, P ¼ 25 MPa, and a solvent ratio of S/F ¼ 32.5g H 2 O g Wood min ð Þ À1 in a semicontinuous reactor results in a conversion of 70-90 wt% of the sugi wood meal into water-soluble compounds, mainly monosaccharides and oligosaccharides, as a result of hydrolysis of cellulose and hemicelluloses [119].…”

Section: Woodmentioning

confidence: 99%

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Processing of Biomass with Hydrothermal and Supercritical Water

Brunner¹

2014

Supercritical Fluid Science and Technology

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Section: Woodmentioning

confidence: 99%

“…Japanese red pine wood was treated with high-temperature water at T ¼ 270 C in a batch reactor [118]. Sugar products dissolved in the aqueous phase are shown in Figure 8.90 together with the total dissolved organic matter (DOC).…”

Section: Woodmentioning

confidence: 99%

Processing of Biomass with Hydrothermal and Supercritical Water

Brunner¹

2014

Supercritical Fluid Science and Technology

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“…Hydrothermal conversion reactor: (1) stainless steel beaker, (2) thermocouple, (3) stirring impeller, (4) gas inlet, (5) input nitrogen gas, (6) magnetically driven stirrer, (7) pressure gauge, (8) gas sample collector.…”

Section: Figurementioning

confidence: 99%

“…It was observed that addition of catalyst (phosphoric acid) resulted in the production of high yield of organic acids including levulinic acid). They also found that higher sugar yield was obtained with acid treatment and the rehydration of HMF was determined as a main levulinic acid formation pathway from Japanese red pine wood (Asghari and Yoshida 2010). The identification of possible reaction pathways of biomass phytomass (cooked carrots and potatoes) degradation in sub-or supercritical water were also evaluated (Kruse and Gawlik 2003).…”

Section: Introductionmentioning

confidence: 99%

Levuli̇ni̇k Asi̇t Üreti̇mi̇ İçi̇n Selülozun Sicak-Basinçli Suda Hi̇drotermal Muamelesi̇

Yuksel¹

2016

Uludağ University Journal of the Faculty of Engineering

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Abstract:In this paper, hot-pressurized water, operating above boiling point and below critical point of water (374. 15 °C and 22.1 MPa), was used as a reaction medium for the decomposition of cellulose to high-value chemicals, such levulinic acid. Effects of reaction temperature, pressure, time, external oxidant type and concentration on the cellulose degradation and product distribution were evaluated. In order to compare the cellulose decomposition and yields of levulinic acid, experiments were performed with and without addition of oxidizing agents (H 2 SO 4 and H 2 O 2 ). Analysis of the liqueur was monitored by HPLC and GC-MS at different temperatures (150 -280 °C), pressures (5-64 bars) and reaction times (30 -120 mins). Levulinic acid, 5-HMF and formic acid were detected as main products. 73% cellulose conversion was achieved with 38% levulinic acid yield when 125 mM of sulfuric acid was added to the reaction medium at 200 °C for 60 min reaction time.Keywords: Cellulose, levulinic acid, 5-HMF, hot-pressurized water Levulinik Asit Üretimi için Selülozun Sıcak-Basınçlı Suda Hidrotermal MuamelesiÖz: Bu makalede selülozu değerli kimyasallara, özellikle levulinik asite, parçalamak amacı ile suyun kaynama noktası üzerinde ve kritik noktası altında (374. 15 °C ve 22.1 MPa) çalışılan sıcak-basınçlı su, reaksiyon ortamı olarak kullanılmıştır. Reaksiyon sıcaklığı, basıncı, süresi, oksitleme ajanı çeşidi ve miktarının selülozun parçalanmasına ve ürün dağılımına olan etkileri incelenmiştir. Selüloz bozunma yüzdesi ve levulinik asit oluşum verimini kıyaslamak amacı ile deneyler hem oksitleme ajanı (H 2 SO 4 ve H 2 O 2 ) kullanarak, hem de kullanmayarak gerçekleştirilmiştir. Farklı sıcaklık (150 -280 °C), basınç (5-64 bar) ve tepkime sürelerinde (30 -120 dk.) oluşan likit ürünlerin analizleri HPLC ve GC-MS ile gerçekleştirilmiştir. Ana sıvı ürünler olarak levulinik asit, 5-HMF ve formik asit tespit edilmiştir. 125 mM sülfürik asit eklenerek 200 °C sıcaklıkta ve 60 dk boyunca gerçekleştirilen tepkime sonucunda, %73 selüloz bozunmuş ve %38 verimle levulinik asit elde edilmiştir.

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“…Subcritical water can function as an acid catalyst or base catalyst in chemical reactions because its dissociation constant exceeds that of ambient water; subcritical water dissociates into hydrogen and hydroxyl ions to a greater extent, thereby accelerating the reactions (Wiboonsirikul et al 2007). Subcritical water is also employed to hydrolyze esters and polysaccharides without using additional catalysts (Asghari & Yoshida 2010, Fujii et al 2006, Haghighat Khajavi et al 2006, Khuwijitjaru et al 2004). Subcritical water extraction has an advantage over supercritical water extraction in terms of equipment cost and energy consumption because the latter must be performed at a high temperature (>374°C) and under high pressure (>22.4 MPa) (Zhang et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Subcritical Water Extraction of Low-molecular-weight Phenolic Compounds from Oil Palm Biomass

Kawamura

Saary

Hashim

et al. 2014

JARQ

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Subcritical water extraction of low-molecular-weight phenolic compounds from oil palm biomass (trunk, bark, petiole, rachis, leaves, empty fruit bunch fiber, midrib spine leaflets, stalk of fruit bunches, flesh, kernel shells, and albumen) was conducted. It was elucidated that gallic acid, protocatechuicaldehyde, p-hydroxybenzoic acid, p-hydroxybenzaldehyde, vanillic acid, syringic acid, vanillin, syringaldehyde p-coumaric acid and ferulic acid, all of which could be used as 2-pyrone-4,6-dicarboxylic acid (PDC) precursors, were contained in all parts of oil palm, although their composition differed. The peak yield of p-hydroxybenzoic acid was obtained among the PDC precursors. With regard to extraction conditions, temperature: 200°C, time: 20-60 min, and liquor ratio: 50-125 were the most efficient. The kernel shell exhibited the highest yield of PDC precursors, followed by the trunk, empty fruit bunch fiber, and bark. The results of our study indicate the oil palm is a potentially valuable source of PDC precursors.

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Conversion of Japanese red pine wood (Pinus densiflora) into valuable chemicals under subcritical water conditions

Cited by 65 publications

References 28 publications

Processing of Biomass with Hydrothermal and Supercritical Water

Processing of Biomass with Hydrothermal and Supercritical Water

Levuli̇ni̇k Asi̇t Üreti̇mi̇ İçi̇n Selülozun Sicak-Basinçli Suda Hi̇drotermal Muamelesi̇

Subcritical Water Extraction of Low-molecular-weight Phenolic Compounds from Oil Palm Biomass

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