安全、健康和环境2025，Vol.25Issue(10)：38-46,9.DOI:10.3969/j.issn.1672-7932.2025.10.005
精对苯二甲酸工艺氧化尾气净化技术评析与展望
Advances in Oxidation Exhaust Purification of Purified Terephthalic Acid Technology
摘要
Abstract
The composition of the oxidation tail gas from the purified terephthalic acid(PTA)unit is intri-cate.It contains a variety of oxygenated volatile organic compounds(VOCs),carbon monoxide(CO),and bromine-containing compounds,posing a formidable challenge for its purification and treatment.This complexity is attributed to numerous side reactions occurring in the upstream processes.As a result,the concentrations of pollutants in the tail gas,such as total non-methane hydrocarbons(TNMHCs),benzene series compounds,and methyl bromide,significantly exceed the limits specified by national standards.This paper comprehensively re-views the current state-of-the-art in the recovery and treatment technologies for PTA oxidation tail gas.Special emphasis is placed on analyzing two types of recovery techniques,namely condensation recovery and liquid ab-sorption,as well as three treatment methods:direct adsorption,thermal oxidation,and catalytic oxidation.Re-garding recovery technologies,condensation techniques can effectively separate organic substances and recover energy.However,they are associated with issues such as high energy consumption at low temperatures,equip-ment corrosion,and potential secondary pollution.Liquid absorption technologies,despite exhibiting good per-formance in mass transfer efficiency and solvent regeneration,encounter problems such as absorbent loss,sys-tem fouling,and the challenge of wastewater treatment.Among the treatment technologies,direct adsorption of-fers operational flexibility but necessitates frequent regeneration.Thermal oxidation(RTO)can achieve thor-ough treatment;nonetheless,it consumes a large amount of energy and is likely to generate secondary pollution in the form of nitrogen oxides(NOx).Catalytic oxidation technology has emerged as the focus of current research and application due to its advantages of low reaction temperature,low energy consumption,and the absence of NOx formation.This paper delves into the types of catalysts employed in catalytic oxidation technology,including noble metal catalysts,transition metal oxide catalysts,and composite oxide catalysts.And the deactivation mecha-nism of the catalyst used in the purification of PTA tail gas under a bromine-containing environment was analyzed.Finally,the paper offers insights into the future development of PTA oxidation tail gas purification technologies.It is proposed that through strategies such as catalyst innovation,process integration,and intelligent control,it is possible to achieve an upgrade from"compliance discharge"to"resource utilization-zero discharge".关键词
尾气处理/废气回收/PTA氧化尾气/VOCs净化/催化氧化Key words
exhaust gas treatment/waste gas recovery/PTA oxidation exhaust gas/VOCs purification/catalytic oxidation分类
资源环境引用本文复制引用
王轩,徐伟,盛楠,梁威,孙冰..精对苯二甲酸工艺氧化尾气净化技术评析与展望[J].安全、健康和环境,2025,25(10):38-46,9.基金项目
中国石化科技部项目(324069),PTA工艺高压氧化尾气净化技术开发. （324069）
