...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Energy Conversion & Management >Using CaO- and MgO-rich industrial waste streams for carbon sequestration
【24h】

Using CaO- and MgO-rich industrial waste streams for carbon sequestration

机译：使用富含CaO和MgO的工业废水进行碳固存

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To prevent rapid climate change, it will be necessary to reduce net anthropogenic CO_2; emissions drastically. This likely will require imposition of a tax or tradable permit scheme that creates a subsidy for negative emissions. Here, we examine possible niche markets in the cement and steel industries where it is possible to generate a limited supply of negative emissions (carbon storage or sequestration) cost-effectively. Ca(OH)_2; and CaO from steel slag or concrete waste can be dissolved in water and reacted with CO_2; in ambient air to capture and store carbon safely and permanently in the form of stable carbonate minerals (CaCO_3). The kinetics of Ca dissolution for various particle size fractions of ground steel slag and concrete were measured in batch experiments. The majority of available Ca was found to dissolve on a time scale of hours, which was taken to be sufficiently fast for use in an industrial process. An overview of the management options for steel slag and concrete waste is presented, which indicates how their use for carbon sequestration might be integrated into existing industrial processes. Use of the materials in a carbon sequestration scheme does not preclude subsequent use and is likely to add value by removing the undesirable qualities of water absorption and expansion from the products. Finally, an example scheme is presented which could be built and operated with current technology to sequester CO_2 with steel slag or concrete waste. Numerical models and simple calculations are used to establish the feasibility and estimate the operating parameters of the scheme. The operating cost is estimated to be US$8/t-CO_2; sequestered. The scheme would be important as an early application of technology for capturing CO_2; directly from ambient air.
机译：为了防止迅速的气候变化，有必要减少人为的净二氧化碳。排放量大幅度增加。这很可能需要征收税收或可交易的许可计划，从而为负排放创造补贴。在这里，我们研究了水泥和钢铁行业中可能的利基市场，在这些市场中，可以经济高效地产生有限的负排放（碳存储或封存）。 Ca（OH）_2;钢渣或混凝土废料中的CaO可溶于水并与CO_2反应；在周围空气中以稳定的碳酸盐矿物（CaCO_3）的形式安全，永久地捕获和储存碳。在分批实验中测量了各种粒度的钢渣和混凝土中Ca溶解的动力学。发现大部分可用的Ca在数小时的时间范围内溶解，这被认为足够快以用于工业过程。概述了钢渣和混凝土废料的管理方案，指出了如何将其用于固碳的方法整合到现有的工业流程中。在碳固存方案中使用该材料并不排除随后的使用，并且可能通过消除产品中不希望的吸水和膨胀质量而增加价值。最后，提出了一个示例方案，该方案可以使用当前技术来构建和运行，以隔离钢渣或混凝土废料中的CO_2。数值模型和简单的计算被用来确定该方案的可行性并估计该方案的运行参数。运营成本估计为8美元/吨CO_2；被隔离。该方案作为捕获二氧化碳的技术的早期应用很重要。直接来自环境空气。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号