School of Energy & Environment, Zhongyuan University of Technology, Zhengzhou 450007, China; Key Laboratory of Heating and Air Conditioning, The Education Department of Henan Province, China.
School of Energy & Environment, Zhongyuan University of Technology, Zhengzhou 450007, China.
Bioresour Technol. 2017 Jun;233:92-98. doi: 10.1016/j.biortech.2017.02.072. Epub 2017 Feb 21.
Hydrothermal carbonization (HTC) was employed to produce hydrochar from bamboo (Phyllostachys heterocycla cv. pubescens) shoot shell (BS) at severity (combined temperature and time) of 4.83-7.69. The pyrolysis and thermodynamics properties of the hydrochars were fully investigated. The results showed that the hydrochar properties (solid yield, C content, H/C and O/C atomic ratios, pyrolysis yield, pyrolysis index, formation of enthalpy, exergy, LHV, and HHV) of BS were highly dependent on severity and could be expressed by dose-response functions. The rapid variations of the hydrochar properties appeared at severity of 5.93-6.59. The pyrolysis temperature interval for the maximum weight loss shifted from 300 to 400°C at hydrothermal severity less than 6.59 to 400-500°C at hydrothermal severity greater than 6.59. The hydrochar thermal stability increased greatly with the severity increasing. And the thermodynamic properties of hydrochar approached those of lignin model compounds as the hydrothermal severity was greater than 6.59.
水热碳化（HTC）被用于在 4.83-7.69 的严酷条件下（综合温度和时间）从毛竹（Phyllostachys heterocycla cv. pubescens）笋壳（BS）中生产水炭。对水炭的热解和热力学性质进行了全面研究。结果表明，BS 的水炭性质（固体产率、C 含量、H/C 和 O/C 原子比、热解产率、热解指数、生成焓、火用、低位热值和高位热值）高度依赖于严酷程度，可以用剂量反应函数来表示。在 5.93-6.59 的严酷程度下，水炭性质的快速变化出现。在水热严酷程度小于 6.59 时，最大失重的热解温度间隔从 300 到 400°C，而在水热严酷程度大于 6.59 时，热解温度间隔从 400-500°C。水炭的热稳定性随着严酷程度的增加而大大提高。随着水热严酷程度大于 6.59，水炭的热力学性质接近木质素模型化合物。
