Reutilizing Paper Mill Sludge as Humidity Regulating Material by Hydrothermal Solidifying
Reutilizing Paper Mill Sludge as Humidity Regulating Material by Hydrothermal Solidifying
复制标题
水热固化再利用造纸污泥作为调湿材料
DOI:
10.1007/s12649-022-01747-4
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发表时间:
2022-03
影响因子:
3.2
通讯作者:
Zhenzi Jing
中科院分区:
文献类型:
--
作者:
Jiajun Miao;Weihao Zhu;Liang Yue;Zhenzi Jing
To produce a high-value added product and thus promote the recycling of paper mill sludge (PMS), a novel reutilization of PMS by hydrothermally solidifying it into humidity regulating material with good strength was put forward. The mixture of calcined PMS (about 600 °C), SiO2and Ca(OH)2could be reacted into Calcium Silicate Hydrates (e.g. C-S-H gel and tobermorite) under hydrothermal condition, and tobermorite was favored to form with Ca(OH)2addition (≥ 15 wt%) for over 3 h at 200 °C. The formed tobermorite made the most contribution to the enhancement of strength so that the flexural strength of the product (PMS:Ca(OH)2:SiO2= 70:20:10) could reach up to 13 MPa. On the other hand, an over-high temperature (≥ 240 °C) or overlong time (≥ 24 h) would decrease the strength. After solidification, needle-like tobermorite entwined each other, and thus increased the mesoporous. The better porosity with more mesoporous resulted in a higher adsorbed/desorbed moisture amount (188 g/m2). So the solidified calcined PMS (13 MPa) exerted an evident reduction on relative humidity (RH) variation, i.e., the amplitude of RH variation was decreased to nearly 1/3 (RH 54% ± 7%) compared to that of the empty reference (no humidity regulating materials were set, RH 54% ± 22%). Thus, PMS could be reutilized as a humidity regulating material indoors, and provide a comfortable and energy-saving environment.Graphical Abstract
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DOI:
--
发表时间:
2004
期刊:
--
影响因子:
--
作者:
Yang Mao-xian
通讯作者:
Yang Mao-xian
影响因子:
2
作者:
Z. M. Veloza;K. Yanagisawa;N. Yamasaki
通讯作者:
Z. M. Veloza;K. Yanagisawa;N. Yamasaki
影响因子:
10.9
作者:
N. Khalili;M. Campbell;G. Sandí;J. Gołaś
通讯作者:
N. Khalili;M. Campbell;G. Sandí;J. Gołaś
影响因子:
11.4
作者:
N. Mostafa;S. El-hemaly;E. I. Al-Wakeel;S. El-Korashy;P. Brown
通讯作者:
N. Mostafa;S. El-hemaly;E. I. Al-Wakeel;S. El-Korashy;P. Brown
影响因子:
7.4
作者:
Dinh-Hieu Vu;Wang, Kuen-Sheng;Bui Xuan Nam
通讯作者:
Bui Xuan Nam