等离子体诱导制备活性基团表层富集吸附剂及其烟气脱汞性能

项目名称： 等离子体诱导制备活性基团表层富集吸附剂及其烟气脱汞性能

项目编号： No.51476066

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 能源与动力工程

项目作者： 罗光前

作者单位： 华中科技大学

项目金额： 83万元

中文摘要： 化学改性吸附剂喷射是控制燃煤烟气汞排放的有效手段。然而烟道喷射时，颗粒内活性组分均匀分布的化学改性吸附剂受内扩散阻力和停留时间短的影响，内层活性组分未得到有效利用。基于此，申请者提出利用低温等离子体诱导含卤含硫前驱体在吸附剂表层生成高汞反应活性基团，增加反应活性，减少内扩散阻力的影响，提高吸附性能同时降低化学物质用量，从而降低吸附剂成本。本申请围绕前驱体的等离子体化学；等离子体中活性粒子与吸附剂表面的相互作用规律；等离子体作用下吸附剂上新生活性基团对汞吸附反应本质机理的影响及吸附剂性能评价；吸附剂制备与喷射耦合集成等方面开展应用基础及开发研究，揭示新型吸附剂汞吸附机理及调控规律，为利用低温等离子体将活性基团富集于吸附剂表层制备廉价高效燃煤烟气喷射脱汞吸附剂和相应的喷射系统设计提供理论指导。

中文关键词： 汞；吸附剂；煤；烟气；低温等离子体

英文摘要： The chemical-impregnated sorbent injection is an efficient way to control mercury emission from coal-fired power plant. However, the active components in the inner layer of the sorbent has no chance to react with mercury due to the high inner diffusion resistance and short residence time during the injection process. Based on this principle, the applicant proposes a novel sorbent synthesis process. The high reactive functional groups are concentrated on the outer layer of sorbents by dissociating gaseous halogen or sulfur containing gas chemical. The sorbent cost was save by reducing the chemical usage. This proposal is going to study the following aspects: 1)plasma chemistry of halogen/sulfur containing chemicals; 2) Interaction between the active species in plasma and sorbent surface; 3) The effects of the new-born reactive functional groups on the native mechanism of mercury adsorption and the assessment of sorbent performance; The optimization of sorbent synthesis process and it's combination to the injection system. Through this study, we will elucidate the mechanism of mercury adsorption on the novel sorbent, proving the fundamentals of how to make a cost-effective sorbent for coal-fired flue gas mercury control and it's injection system design.

英文关键词： mercury;sorbent;coal;flue gas;non-thermal plasma