Abstract

Due to the restriction such as the Minamata Convention as well as the IED of the European Commission, mercury removal from flue gases of coal-fired power plants (CPP) is an increasingly important environmental issue. This makes this topic very crucial for both the energy industry and scientists. This paper shows how mercury arises from natural resources, i.e., coals, through their combustion processes in CPP and considers the issue of mercury content in flue gases and solid-state coal combustion by-products. The main part of this paper presents a review of the solid sorbents available for elemental mercury control and removal processes, tested on a laboratory scale. The described solutions have a potential for wider usage in exhaust gas treatment processes in the energy production sector. These solutions represent the latest developments in the field of elemental mercury removal from gases. The authors present an overview of the wide range of solid sorbents and their modifications intended to increase affinity for Hg⁰. Among the presented sorbents are the well-known activated carbon solutions but also novel modifications to these and other innovative sorbent proposals based on, e.g., zeolites, biochars, other carbon-based materials, metal-organic frameworks. The paper presents a wide range of characteristics of the described sorbents, as well as the conditions for the Hg⁰ removal experiments summarizing the compendium of novel solid sorbent solutions dedicated to the removal of elemental mercury from gases.

Graphic abstract

中文翻译：

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用于控制和去除气流中元素汞的固体吸附剂分析：综述

摘要

由于《水am公约》和欧盟委员会的IED等限制，从燃煤电厂（CPP）的烟气中除汞已成为一个日益重要的环境问题。这使得该主题对能源行业和科学家都至关重要。本文说明了汞如何通过CPP的燃烧过程从自然资源（即煤）中产生，并考虑了烟道气和固态煤燃烧副产物中的汞含量问题。本文的主要部分介绍了可用于元素汞控制和去除过程的固体吸附剂的综述，并在实验室规模上进行了测试。所描述的解决方案具有在能源生产部门的废气处理过程中更广泛使用的潜力。这些解决方案代表了从气体中去除元素汞领域的最新发展。作者概述了各种固体吸附剂及其旨在增加对汞的亲和力的改性方法⁰。在提出的吸附剂中，有众所周知的活性炭溶液，还有基于沸石，生物炭，其他碳基材料，金属有机骨架等对这些和其他创新性吸附剂提案的新颖修改。本文介绍了上述吸附剂的各种特性，以及Hg ⁰脱除实验的条件，总结了专门用于从气体中脱除元素汞的新型固体吸附剂的概述。

图形摘要