State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, PR China; Department of New Energy Science and Engineering, University of Science and Technology, Wuhan, Hubei 430074, PR China.
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, PR China; Department of New Energy Science and Engineering, University of Science and Technology, Wuhan, Hubei 430074, PR China; Harvard China Project, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Pierce Hall G2B, 29 Oxford St., Cambridge, MA 02138, United States.
Bioresour Technol. 2018 Aug;261:62-69. doi: 10.1016/j.biortech.2018.03.094. Epub 2018 Mar 29.
The study presented an approach to introduce Mg-based additives into cotton stalk for strengthening deoxygenation effect during torrefaction. Then catalytic pyrolysis of torrefied feedstock with Mg-based additives residue as catalyst was performed at 550 °C for 10 min in a fixed-bed reactor. The effects of torrefaction temperature (200, 230, 260, 290, 320, 350 °C), type of Mg-based additive (MgO and MgO-KCO), mass ratio of additive to biomass (0.5, 1 and 2) on pyrolysis were investigated. The results indicated that yields of bio-char and bio-oil significantly increased and decreased with torrefaction temperature rising to 350 °C. MgO inhibited pyrolysis bio-char yield increase with torrefaction severity. MgO-KCO increased H yield a lot from 1.39 to 3.67 mmol/g. It also effectively improved the aromatic hydrocarbons in bio-oil and the reduction of acids. A maximum aromatic hydrocarbons yield of 16.05% was obtained with MgO-KCO (the mass ratio of 0.5:1) at torrefaction temperature of 320 °C.
该研究提出了一种在热解过程中向棉秆中添加镁基添加剂以增强脱氧效果的方法。然后，在固定床反应器中，以 Mg 基添加剂残渣为催化剂，在 550°C 下对热解原料进行催化热解，时间为 10min。考察了热解温度（200、230、260、290、320、350°C）、镁基添加剂类型（MgO 和 MgO-KCO）和添加剂与生物质的质量比（0.5、1 和 2）对热解的影响。结果表明，随着热解温度升高到 350°C，生物炭和生物油的产率显著增加和减少。MgO 抑制了热解生物炭产率随热解严重程度的增加。MgO-KCO 使 H 产率从 1.39mmol/g 大幅增加到 3.67mmol/g。它还有效地改善了生物油中的芳烃和酸的减少。在 320°C 的热解温度下，使用 MgO-KCO（质量比为 0.5:1）可获得最大芳烃收率 16.05%。
