文献类型：期刊文献

英文题名：Spent coffee grounds biochar from torrefaction as a potential adsorbent for spilled diesel oil recovery and as an alternative fuel

作者：Lee, Kuan-Ting[1];Cheng, Ching-Lin[1];Lee, Da-Sheng[2];Chen, Wei-Hsin[1,3,4];Vo, Dai-Viet N.[5];Ding, Lu[6];Lam, Su Shiung[7,8]

机构：[1]Natl Cheng Kung Univ, Dept Aeronaut & Astronaut, Tainan 701, Taiwan;[2]Natl Taipei Univ Technol, Dept Energy & Refrigerating Air Conditioning Engn, Taipei 10608, Taiwan;[3]Tunghai Univ, Res Ctr Smart Sustainable Circular Econ, Taichung 407, Taiwan;[4]Natl Chin Yi Univ Technol, Dept Mech Engn, Taichung 411, Taiwan;[5]Nguyen Tat Thanh Univ, Ctr Excellence Green Energy & Environm Nanomat CE, 300A Nguyen Tat Thanh,Dist 4, Ho Chi Minh City 755414, Vietnam;[6]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China;[7]Univ Malaysia Terengganu, Higher Inst Ctr Excellence HICoE, Inst Trop Aquaculture & Fisheries AKUATROP, Terengganu 21030, Malaysia;[8]Henan Agr Univ, Henan Prov Forest Resources Sustainable Dev & Hig, Sch Forestry, Zhengzhou 450002, Peoples R China

年份：2022

卷号：239

外文期刊名：ENERGY

收录：;EI(收录号：20214511134524);WOS:【SCI-EXPANDED(收录号:WOS:000753478800015)】；

基金：The authors acknowledge the financial support provided by the Ministry of Science and Technology, Taiwan, R.O.C., under the grant numbers MOST 109-2221-E-006-040-MY3, MOST 110-2622-E006-001-CC1, and MOST 110-3116-F-006-003-for this research. This research is also supported in part by the Higher Education Sprout Project, Ministry of Education to the Headquarters of University Advancement at National Cheng Kung University (NCKU). The authors thank Universiti Malaysia Terengganu under Golden Goose Research Grant Scheme (GGRG) (Vot 55191) for supporting Dr. Lam to perform this joint project in collaboration with National Cheng Kung University. The authors gratefully acknowledge the use of EM000600 of 110-2731-M-006-001 belonging to the Core Facility Center of National Cheng Kung University.

语种：英文

外文关键词：Oil spill recovery; Torrefaction; Spent coffee grounds (SCG); Waste reuse and circular economy; Bioadsorbent; Oilchar

摘要：A new approach using torrefled spent coffee grounds (TSCG) as a bioadsorbent is presented for marine oil spill recovery. The adsorbent after diesel adsorption is referred to as "oilchar". The torrefaction of spent coffee grounds (SCG) is performed at 200, 250, and 300 degrees C where the solid yields are 95%, 80%, and 62%, respectively. The specific surface area, hydrophobicity, thermal stability, diesel adsorption capacity of SCG increases with increasing torrefaction temperature. SCG torrefled at 300 degrees C (300-TSCG) can intensify its specific surface area, contact angle, crystallinity, diesel adsorption capacity by factors of 7.6 folds, 10.3%, 35%, and 1.47 times, respectively. The diesel adsorption capacity of 300-TSCG is 1.36 times that of commercial activated carbon. The higher heating value of 300-TSCG is 30.32 MJ kg(-1), accounting for a 45.1% improvement compared with that of untorrefied SCG. After adsorbing diesel, the HHV of the oilchar from 300-TSCG is 1.23 times that of SCG-oilchar, while the ignition temperature of 300-TSCG decreases from 301 to 157 degrees C. Overall, TSCG is a promising material to adsorb spilled diesel oil for environmental protection, and the resultant oilchar is a potential alternative fuel for thermal power plants and steel mills, thereby achieving waste reuse and circular economy. (C) 2021 Elsevier Ltd. All rights reserved.