Strategy and technology to recycle wafer-silicon solar modules
Strategy and technology to recycle wafer-silicon solar modules
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DOI：
10.1016/j.solener.2017.01.001
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发表时间：
2017-03-01
期刊：
影响因子：
6.7
通讯作者：
Tao, Meng
中科院分区：
文献类型：
--
作者：
Huang, Wen-Hsi;Shin, Woo Jung;Tao, Meng
可持续太阳能技术的一个主要障碍是寿命结束的太阳能组件。本文提出了一种硅片组件的回收工艺。这是一个三步的过程，分解硅模块，回收各种材料，几乎不留下任何垃圾填埋。演示了两项新技术，以实现拟议的回收过程。一种是顺序电积，可以从Si模块、Ag、Pb、Sn和Cu中逐一回收多种金属。另一个是薄片电阻监测，最大限度地从硅模块中回收太阳级硅。回收的金属纯度在99%以上，回收的硅达到太阳级硅的标准。回收的硅和金属是太阳能产业的新原料，每个组件产生11-12.10美元的收入。这笔收入使硅模组的回收业务在没有任何政府支持的情况下盈利。回收利用的化学品经过精心挑选，以尽量减少对环境的影响。在现有太阳能组件配送网络的基础上，提出了一个回收报废太阳能组件的网络，以控制回收成本。因此，晶圆硅模块的回收过程在技术上、环境上和经济上都是可持续的。(C) 2017 Elsevier Ltd.版权所有。
A major obstacle to sustainable solar technologies is end-of-life solar modules. In this paper, a recycling process is proposed for wafer-Si modules. It is a three-step process to break down Si modules and recover various materials, leaving behind almost nothing for landfill. Two new technologies are demonstrated to enable the proposed recycling process. One is sequential electrowinning which allows multiple metals to be recovered one by one from Si modules, Ag, Pb, Sn and Cu. The other is sheet resistance monitoring which maximizes the amount of solar-grade Si recovered from Si modules. The purity of the recovered metals is above 99% and the recovered Si meets the specifications for solar-grade Si. The recovered Si and metals are new feedstocks to the solar industry and generate $11-12.10/module in revenue. This revenue enables a profitable recycling business for Si modules without any government support. The chemicals for recycling are carefully selected to minimize their environmental impact. A network for collecting end-of-life solar modules is proposed based on the current distribution network for solar modules to contain the collection cost. As a result, the proposed recycling process for wafer-Si modules is technically, environmentally and financially sustainable. (C) 2017 Elsevier Ltd. All rights reserved.