Sequential Fractionation of Palm Empty Fruit Bunch and Microwave-Assisted Depolymerization of Lignin for Producing Monophenolic Compounds

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Panyadee R., Posoknistakul P., Jonglertjunya W., Kim-Lohsoontorn P., Laosiripojana N., Matsagar B.M., Wu K.C.-W., Sakdaronnarong C.

ผู้เผยแพร่: American Chemical Society

ปีที่เผยแพร่ (ค.ศ.): 2018

Volume number: 6

Issue number: 12

หน้าแรก: 16896

หน้าสุดท้าย: 16906

จำนวนหน้า: 11

นอก: 2168-0485

eISSN: 2168-0485

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85057626112&doi=10.1021%2facssuschemeng.8b04246&partnerID=40&md5=19a65032f75b74fb33c7cbc3d9efa02f

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

We develop a sequential fractionation of palm empty fruit bunches (EFB) and microwave-assisted depolymerization of lignin for producing monophenolic compounds with high yields. EFB has been known as a low-priced and abandoned residue from the palm oil milling process due to its low heating value and generation of toxic gases upon burning; therefore, valorization of EFB has been an important task for circular economy. In this study, a subsequent alkaline hot compressed water fractionation to separate hemicellulose and lignin from cellulose has been studied. The lignin separation by lignin precipitation and a filtration process followed by microwave-assisted lignin oxidative depolymerization to high value phenolic compounds was proposed. We systematically screened many catalysts as well as investigated reaction conditions (such as the concentration of hydrogen peroxide, reaction time, etc.) to achieve the highest yield of lignin-derived phenolic compounds. It was found that the optimal conditions for depolymerization of pretreated EFB lignin were (i) NaOH solution with 2.5% (w/w) hydrogen peroxide, (ii) microwave (300 W) for 15 min, and (iii) bimetallic Cu(OH)2 and Fe2O3 catalysts. The highest percentage of the total phenolic compound concentration peak area is 91.78%, including 42.84% of syringol, 5.42% of vanillin, 8.71% of acetovanillone, 6.65% of syringaldehyde, and 28.16% of acetosyringone. The proposed sequential fractionation and microwave-assisted treatment would be promising for converting other lignocellulosic raw biomass to useful phenolic compounds. ฉ 2018 American Chemical Society.

คำสำคัญ

Alkaline hot compressed water fractionation, Lignin depolymerization, Microwave reaction, Palm empty fruit bunch