Thermal conversion of municipal solid waste via hydrothermal carbonization: Comparison of carbonization products to products from current waste management techniques
Thermal conversion of municipal solid waste via hydrothermal carbonization: Comparison of carbonization products to products from current waste management techniques
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DOI：
10.1016/j.wasman.2012.02.012
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发表时间：
2012-07-01
期刊：
影响因子：
8.1
通讯作者：
Berge, Nicole D.
中科院分区：
文献类型：
--
作者：
Lu, Xiaowei;Jordan, Beth;Berge, Nicole D.
水热碳化（HTC）是一种新型的热转化过程，可能是一种可行的手段，用于管理固体废物流，同时最大限度地减少温室气体的产生，并产生具有内在价值的残余材料。HTC是一种湿的、相对低温（180-350 ℃）的热转化方法，其已显示将生物质转化为被称为水热炭的含碳残余物。来自分批实验的结果表明，代表性废物材料的HTC是可行的，并且导致大部分碳（初始存在的碳的45-75%）保留在水热炭内。分批实验期间的气体产生表明，较长的反应时间可能是期望的，以最大化能量有利的产物的产生。如果将水热炭用于碳将保持储存的应用中，结果表明，来自HTC的气体产物导致比与填埋、堆肥和焚烧相关的气体更少的g CO2当量排放。当考虑使用水热炭作为固体燃料时，从水热炭可以得到比从填埋和厌氧消化期间废物降解产生的气体以及从食物废物的焚烧产生的气体更多的能量。使用水热炭作为燃料来源所产生的碳排放量小于焚烧所产生的碳排放量，这表明HTC可能是焚烧的一种对环境有益的替代方法。从HTC获得的环境效益的类型和程度将取决于水热炭的使用/HTC的目的（例如，能源生产或碳储存）。(C)2012爱思唯尔有限公司保留所有权利。
Hydrothermal carbonization (HTC) is a novel thermal conversion process that may be a viable means for managing solid waste streams while minimizing greenhouse gas production and producing residual material with intrinsic value. HTC is a wet, relatively low temperature (180-350 degrees C) thermal conversion process that has been shown to convert biomass to a carbonaceous residue referred to as hydrochar. Results from batch experiments indicate HTC of representative waste materials is feasible, and results in the majority of carbon (45-75% of the initially present carbon) remaining within the hydrochar. Gas production during the batch experiments suggests that longer reaction periods may be desirable to maximize the production of energy-favorable products. If using the hydrochar for applications in which the carbon will remain stored, results suggest that the gaseous products from HTC result in fewer g CO2-equivalent emissions than the gases associated with landfilling, composting, and incineration. When considering the use of hydrochar as a solid fuel, more energy can be derived from the hydrochar than from the gases resulting from waste degradation during landfilling and anaerobic digestion, and from incineration of food waste. Carbon emissions resulting from the use of the hydrochar as a fuel source are smaller than those associated with incineration, suggesting HTC may serve as an environmentally beneficial alternative to incineration. The type and extent of environmental benefits derived from HTC will be dependent on hydrochar use/the purpose for HTC (e.g., energy generation or carbon storage). (C) 2012 Elsevier Ltd. All rights reserved.