Environmental Evaluation of the Improvements for Industrial Scaling of Zeolite Membrane Manufacturing by Life Cycle Assessment
Environmental Evaluation of the Improvements for Industrial Scaling of Zeolite Membrane Manufacturing by Life Cycle Assessment
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DOI：
10.1021/acssuschemeng.8b04336
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发表时间：
2018-10
影响因子：
8.4
通讯作者：
Alberto Navajas;Nitish Mittal;Neel Rangnekar;Han Zhang;A. Cornejo;L. M. Gandía;M. Tsapatsis
中科院分区：
文献类型：
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作者：
Alberto Navajas;Nitish Mittal;Neel Rangnekar;Han Zhang;A. Cornejo;L. M. Gandía;M. Tsapatsis
沸石膜的工业化生产是沸石膜合成进展的普遍愿望，但对其环境因素的评价一直被忽视。这项研究的目的是量化沸石膜合成对环境的影响，涉及沸石膜合成的最新进展：(I)允许亚微米厚度的膜的种子层；(Ii)避免使用大量昂贵的结构导向剂的无凝胶二次处理；以及(Iii)使用低成本的聚合物载体而不是传统的陶瓷载体。通过使用GABI 8.7 Pro软件执行的生命周期评估来评估影响。传统种子层和纳米片种子层的影响是相似的，但只占总影响的一小部分。尽管与溶剂型二次生长相比，无凝胶二次生长的影响要小10倍，但经食人鱼处理的纳米片的生长速度比传统的溶剂型二次生长要小。
Industrial scaling of zeolite membrane manufacturing is the general aspiration of the progresses in zeolite membranes synthesis, but the evaluation of their environmental aspects has been disregarded. The objective of this study is to quantify the environmental impacts of zeolite membrane synthesis with respect to the recent advances in the synthesis of zeolite membranes: (i) seed layers that allow membranes of submicron thickness; (ii) gel-less secondary treatments that avoid the use of large amounts of expensive structure directing agents; and (iii) use of low-cost polymer supports instead of conventional ceramic supports. Impacts are evaluated via life cycle assessment, which is performed using GaBi 8.7 Pro software. The impacts due to conventional and nanosheet seed layers are comparable but contribute only a small portion to the total impacts. Although the gel-less secondary growth has up to 10-fold lesser impacts compared to that for solvent-based secondary growth, a Piranha-treated nanosheets metho...