Effect of the Marangoni convection in the unsteady thin film spray of CNT nanofluids

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Rehman A., Gul T., Salleh Z., Mukhtar S., Hussain F., Nisar K.S., Kumam P.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2019

วารสาร: Fuel Processing Technology (0378-3820)

Volume number: 7

Issue number: 6

นอก: 0378-3820

eISSN: 1873-7188

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85074040381&doi=10.1016%2fj.fuproc.2019.106248&partnerID=40&md5=3096613d545606505483d222350720fa

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

Alkaline lignin obtained from paper manufacturing is a potential feedstock for upgrading to produce value-added chemicals. This study demonstrates the efficiencies of synthesized Ni supported CeO2-ZrO2 catalysts to convert this low-cost alkaline lignin into value-added phenolic-based chemicals for further commercial applications. Lignin depolymerization was performed under mild reaction conditions, namely, reaction temperature of 200–300 °C, and reaction time of 1–5 h. Three different catalyst preparation methods (simple wet-impregnation, wet-impregnation assisted reduction in H2 atmosphere and one-step chemical reduction) were investigated and used to evaluate possible correlations between the active Ni phase and catalytic performance in lignin depolymerization. The active Ni phase was successfully formed by one-step chemical reduction method which showed a significant improvement on product yield, especially lignin oil. The best result obtained in lignin depolymerization was by using 10%Ni/CeO2-ZrO2-red catalyst which resulted in producing a high yield of lignin oil (46.8%) from lignin feedstock under mild condition of 250 °C. The major phenolic compounds in lignin oil were: guaiacol, methyl-guaiacol, ethyl-guaiacol, vanillin, acetovanillone, and homovanillic acid. Furthermore, the reaction temperature affected the product yield and product distribution resulting in higher diversity of phenolic compounds in lignin oil. © 2019

คำสำคัญ

Alkaline lignin, Catalytic depolymerization, Chemical reduction, NaBH4, Reducing agent