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Yoshihara, Kazutoshi; Kobayashi, Takeshi; Fujii, Toshiro; Akamatsu, Isao

doi:10.2524/jtappij.38.466

Cited by 50 publications

(11 citation statements)

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“…On the extractives-free samples, holocellulose and lignin were, respectively, determined by modified Wise method 17 and modified Klason method. 18 Both were then ash-and proteincorrected by subtracting ash and protein contents of the residues from the total residues yielded. Holocellulose was additionally corrected for its residual lignin content.…”

Section: Analytical Methods For the Determination Of Chemical Composimentioning

confidence: 99%

“…Additionally, monosaccharides composition was determined by a combined method. 20 Glucose was quantified as hydrolysate from the Klason lignin procedure with 72% and subsequent 3% H 2 SO 4 treatments, 18 then analyzed with highperformance anion-exchange chromatography (HPEAC, Dionex ICS-3000 system) equipped with CarboPac PA-1 column (4 mm 6 250 mm), whereas the other neutral sugars and the uronic acids by acid methanolysis method 21 with slight modifications. In brief, 2 ml of 2 M HCl in anhydrous methanol was poured to 10 mg of extractives-free sample for methanolysis at 100 uC for 3 h. Afterwards, the sample was cooled and 100 ml was pipetted into a 1 ml glass microtube which was, then, put into a desiccator and vacuumed overnight to remove the remaining methanol and HCl.…”

Section: Analytical Methods For the Determination Of Chemical Composi...mentioning

confidence: 99%

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Comparative study on chemical composition of various biomass species

2013

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In this study, the chemical composition of 32 samples coming from 29 different biomass species including a gymnosperm, 2 dicotyledonous angiosperms, 17 monocotyledonous angiosperms and 9 algae species was successfully determined using an established method applicable to analyze various biomass species. The obtained data allowed a direct comparison of the biomass in their chemical composition. It was, thus, revealed that although the chemical composition differed from one species to another, and even from different parts of the same plants, similar trends were found in the composition of biomass species belonging to the same taxonomic group. Based on those results, it was clarified that the chemical composition of a biomass sample is related to its taxonomy. Therefore, typical chemical composition for each taxonomic group was proposed and the potential of each group for different biorefinery platforms could be successfully established. Table 1 Various biomass samples studied in this work Taxonomy Scientific name Common name Sample No.

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Section: Analytical Methods For the Determination Of Chemical Composimentioning

confidence: 99%

Section: Analytical Methods For the Determination Of Chemical Composi...mentioning

confidence: 99%

Comparative study on chemical composition of various biomass species

2013

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“…Analisis lignin pada residu holoselulosa ditentukan tidak hanya berasal dari lignin tak larut asam atau lignin Klasson, tetapi karena residu holoselulosa mengandung senyawa lignin yang termodifikasi yang tidak dapat ditentukan dengan asam sulfat 72% dan senyawa lignin tersebut kehilangan kemampuan kondensasi ketika dioksidasi oleh natrium klorit (Suzuki, 1953). Oleh karena itu, kandungan lignin ditentukan berdasarkan jumlah total dari lignin larut dan tak larut asam (Yoshihara et al, 1984). Kadar abu ditentukan secara gravimetri berdasarkan pengabuan contoh pada suhu 600 ºC selama 4 jam dan kadar protein ditentukan dengan metode Kjeldahl (Thiex et al, 2002).…”

Section: Modifikasi Metode Klorit Asam Dengan Koreksi Kadar Lignin Aunclassified

Analisis Holoselulosa: Tinjauan Metode Analisis Kimia Konvensional

2020

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Holoselulosa merupakan fraksi karbohidrat yang merupakan gabungan antara selulosa dan hemiselulosa. Fraksi holoselulosa menjadi penting karena merupakan bahan baku yang digunakan menjadi berbagai produk yang memiliki bernilai tinggi. Kandungan holoselulosa bervariasi di antara berbagai spesies kayu. Analisis holoselulosa penting untuk memperoleh informasi mengenai karakteristik dan kualitas bahan baku, mengoptimalkan pemanfaatan sumber bahan baku, dan meningkatkan efisiensi proses sehingga memungkinan komersialisasi proses konversi biomassa menjadi bahan lain yang berekonomis tinggi. Prinsip analisis holoselulosa metode kimia konvensional adalah fraksinasi dan isolasi yaitu dengan menyisihkan lignin, ekstraktif, dan abu, namun menjaga selulosa dan hemiselulosa tetap utuh. Metode analisis holoselulosa biasanya menggunakan metode delignifikasi, menggunakan reagen pengoksidasi kuat pada pH rendah atau tinggi dan suhu tinggi. Metode tersebut meliputi klor dioksida, klor-piridin, klor-etanol amina, klor-1,4-dioksan, klorit asam, dan asam perasetat. Metode natrium klorit banyak digunakan untuk analisis holoselulosa dengan karena prosedur pemisahan sederhana dan delignifikasi cepat. Artikel ini memaparkan sejumlah metode analisis holoselulosa, prinsip penentuan, reaksi, keunggulan dan kelemahan masing-masing metode sehingga dapat memberikan gambaran untuk memilih metode yang sesuai dan akurasi masing-masing metode tersebut.Holocellulose Analysis: A Review of Conventional Chemical Analysis MethodsAbstractHolocellulose is a carbohydrate fraction that is a combination of cellulose and hemicellulose. Holocellulose fraction is important because it is the raw material used to be processed into various high-value products. Holocellulose content varies among various wood species. Holocellulose analysis is important to gain information on the characteristics and quality of raw materials, optimize the utilization of raw material sources, and improve process efficiency so that it is possible to commercialize the process of converting biomass into other high-economical materials. The principle of holocellulose analysis by conventional chemistry method is fractionation and isolation by removing lignin, extractives, and ash, but keeping cellulose and hemicellulose intact. Holocellulose analysis methods usually use the delignification method, using strong oxidizing reagents in low or high pH and high temperatures. Such methods include chlorine dioxide, chlorine-pyridine, chlorine-ethanol amine, chlor-1,4-dioxane, acid chlorite, and peracetic acid. The sodium chlorite method is widely used for the analysis holocellulose because of its simple separation procedure and rapid delignification. This article presents several holocellulose analysis methods, principles of determination, reactions, strengths, and weaknesses of each method to provide an overview for selecting the appropriate method and the accuracy of each method.Keywords: holocellulose analysis, conventional analytical chemistry method, delignification

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“…This biomaterial engineering is expected to produce local non-cotton raw materials from a variety of natural resources in Indonesia that are environmentally friendly in fashion applications. The results obtained are also expected to produce innovative substitute products for sustainable palm-based fashion to reduce imported raw materials in the form of synthetic fibers such as polyester and rayon made from cotton [ 10 , 11 , 12 ]. This will contribute immensely through science and technology to provide solutions to two national problems, namely, the abundance of EFB waste and imports of raw materials for the creative fashion industry.…”

Section: Introductionmentioning

confidence: 99%

Oil Palm Empty Fruit Bunches as Raw Material of Dissolving Pulp for Viscose Rayon Fiber in Making Textile Products

et al. 2022

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The creative fashion industry produces several textile products that play an important role in the national economy. In various countries, this industry has continued to grow along with the strong flow of information technology and e-commerce. The development of textile products for fashion is very dynamic and competitive. Competition is not only about price, but also the quality of organic/synthetic materials, the comfort provided, and designs that change every 4–6 months. Recently, creative fashion not only relies on natural and synthetic polymer-made fibers but also biomass-based waste materials. Therefore, this study aims to manufacture textile products from biomass-based waste materials that can be applied to the creative fashion industry. Two types of raw materials from oil palm empty fruit bunches (EFB), namely, whole-empty fruit bunches (WEFB) and stalk-empty fruit bunches (SEFB), are used as an excellent innovation of rayon viscose fiber (RVF), a noncotton organic yarn capable of providing a solution to the 99% import of global cotton needs. This is expected to increase competitiveness, as well as the added value of palm oil products and their derivatives. The process of manufacturing DP chemically includes prehydrolysis, cooking, bleaching to dissolve the lignin and noncellulosic materials as well as isolation to purify POEFB fiber. Furthermore, DP testing is carried out to determine product quality and compare it with the national product standards. The results show that the alpha-cellulose content reaches >94% with variations in the active alkali of 18%, 20% and 24%. This implies that the WEFB and SEFB are used to fulfill the first requirements of the national standard (SNI 938:2017). The WEFB with an active alkali variation of 24% meets the SNI standard for rayon pulp with a value of S10 = 3.07 and S18 = 7.14%, while all variations of SEFB show opposite results. The use of active alkali at 24% had a brighter color than between 18% and 20%. Additionally, the fiber density of WEFB appears to be higher than that of SEFB. These results correlate positively with DP prepared using 24% alkali as the optimum treatment for all products, as well as the morphological observations performed with scanning electron microscopy (SEM), which shows that WEFB fixated fiber had a larger diameter than SEFB.

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Cited by 50 publications

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Comparative study on chemical composition of various biomass species

Comparative study on chemical composition of various biomass species

Analisis Holoselulosa: Tinjauan Metode Analisis Kimia Konvensional

Oil Palm Empty Fruit Bunches as Raw Material of Dissolving Pulp for Viscose Rayon Fiber in Making Textile Products

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