Towards a more efficient Hydrothermal Carbonization: Processing water recirculation under different conditions

被引：30

作者：

Boutaieb, M. ^{[1
]}

Roman, S. ^{[2
]}

Ledesma, B. ^{[2
]}

Sabio, E. ^{[2
]}

Guiza, M. ^{[1
]}

Ouederni, A. ^{[1
]}

机构：

[1] Univ Gabes, Natl Sch Engn Gabes, Lab Proc Engn & Ind Syst LR11ES54, Medenine St, Gabes 6029, Tunisia

[2] Univ Extremadura, Ind Engn Sch, Appl Phys Dept, Avda Elvas S-N, Badajoz 06006, Spain

来源：

WASTE MANAGEMENT | 2021年 / 132卷

关键词：

Hydrochars; Hydrothermal carbonization; Recycling process water; CARBON MATERIALS; HYDROCHAR; BIOFUEL;

D O I：

10.1016/j.wasman.2021.07.023

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The use of Processing Water (PW) on the Hydrothermal Carbonization (HTC) of tunisian pine cones was investigated under different temperature (200 and 240 degrees C) and residence time conditions (3 and 20 h). Recirculating PW improved the HC (hydrochar) solid yield, without being detrimental to the carbon content of the HC. The heating value of the HCs, that with a single reaction already involved a rise of this parameter in the range 22.1-55.8% as compared to the raw material, was further increased up to 24.9-58.6% for cyclic runs. This was attributed to enhanced secondary char formation by reusing liquid, although this effect depended on the severity of previous HTC and was affected by both temperature and time. The HCs showed an increment on C and especially on N for cyclic runs. Also, thermal degradation peaks during HC TGA/DTA analyses showed a broader temperature range decomposition upon pyrolysis when PW was recirculated. The modifications of HC surface morphologies and functional groups was also investigated and associated to related reaction mechanisms.

引用

页码：115 / 123

页数：9

共 32 条

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