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Study on characteristics and industrial application of catalysts in catalytic combustion of formaldehyde production tail gas
- Low-Carbon Chemistry and Chemical Engineering Vol. 50, Issue 12, Pages: 87-94(2025)
- 作者机构：
1.南通江天化学股份有限公司，江苏 南通 226010
2.西南化工研究设计院有限公司 多孔材料与分离转化 全国重点实验室，国家碳一化学工程技术研究中心，四川 成都 610225
- 作者简介：
- 基金信息：
DOI：10.12434/j.issn.2097-2547.20250098
CLC： TQ426;X701Received：13 March 2025，
Revised：2025-04-30，
Published：25 December 2025
- 稿件说明：
移动端阅览
陆辉,乔莎,张俊等.甲醛生产尾气催化燃烧中催化剂特性及其工业应用研究[J].低碳化学与化工,2025,50(12):87-94.
LU Hui,QIAO Sha,ZHANG Jun,et al.Study on characteristics and industrial application of catalysts in catalytic combustion of formaldehyde production tail gas[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(12):87-94.
陆辉,乔莎,张俊等.甲醛生产尾气催化燃烧中催化剂特性及其工业应用研究[J].低碳化学与化工,2025,50(12):87-94. DOI： 10.12434/j.issn.2097-2547.20250098.
LU Hui,QIAO Sha,ZHANG Jun,et al.Study on characteristics and industrial application of catalysts in catalytic combustion of formaldehyde production tail gas[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(12):87-94. DOI： 10.12434/j.issn.2097-2547.20250098.
摘要
铁钼法甲醇制甲醛生产尾气中含有一氧化碳（CO）、甲醛（CH
2
O）、甲醇（CH
3
OH）和二甲醚（DME）等多种污染物，协同脱除难度较大。结合不同工业催化燃烧催化剂的特性，采用组合装填方式可以提高对复杂污染物的协同净化效率。采用XRD、N
2
吸/脱附和TEM对Cat 1#和Cat 2#两种工业催化剂进行了物性分析。结合催化剂活性实验室评价结果与工业排放控制系统（ECS）装置运行情况，解析了催化剂构效关系，并阐明了其在工业应用中的效果。结果表明，Cat 1#具有较大的比表面积，这促进了贵金属分散，降低了CO起活温度；Cat 2#平均孔径较大，可以减小DME的扩散阻力，增大其转化率。采用组合装填方式汇集了两种催化剂的优点。实验室评价结果显示，反应在设定温度150 ℃（床层温度 135.4 ℃）时开始起活，起活后CO催化燃烧释放的热量使床层温升达到100~110 ℃，DME转化率超过90%。工业运行中，初期入口温度为170 ℃，此时出口甲醛质量浓度为1.1 mg/m
3
，非甲烷总烃质量浓度为1.7 mg/m
3
；工业运行末期，将入口温度提高至183 ℃，此时出口甲醛质量浓度为4.2 mg/m
3
，非甲烷总烃质量浓度为9.8 mg/m
3
，仍能满足排放标准。组合装填策略为复杂废气催化净化技术的开发提供了新思路，其工业应用数据对工程放大具有重要参考价值。
Abstract
Tail gas from Fe-Mo methanol-to-formaldehyde production contains multiple pollutants such as carbon monoxide (CO)
formaldehyde (CH
2
O)
methanol (CH
3
OH) and dimethyl ether (DME)
which are difficult to remove collaboratively. Based on the characteristics of different industrial catalytic combustion catalysts
a combination loading strategy was adopted to enhance the synergistic purification efficiency of complex pollutants. The physical properties of two industrial catalysts
Cat 1# and Cat 2#
were analyzed using XRD
N
2
adsorption/desorption and TEM. Combined with laboratory activity evaluation results and the operation of the industrial emission control system (ECS)
the structure-activity relationships of the catalysts were clarified
and their industrial application performance was elucidated. The results show that Cat 1# has a larger specific surface ar
ea
which promotes precious metal dispersion and reduces the light-off temperature of CO
and Cat 2# has a larger average pore size
which decreases the diffusion resistance of DME and improves its conversion rate. The combination loading strategy integrates the advantages of both catalysts. Laboratory evaluation results show that the reaction start to light off at a set temperature of 150 ℃ (bed temperature 135.4 ℃). After light-off
the heat released by CO catalytic combustion increases the bed temperature from 100 ℃ to 110 ℃
and the DME conversion rate exceeds 90%. In industrial operation
at the initial inlet temperature of 170 ℃
the outlet formaldehyde mass concentration is 1.1 mg/m
3
and the total non-methane hydrocarbons mass concentration is 1.7 mg/m
3
. At the end of operation
when the inlet temperature is increased to 183 ℃
the outlet formaldehyde mass concentration reaches 4.2 mg/m
3
and the total non-methane hydrocarbons mass concentration is 9.8 mg/m
3
still meeting the emission standards. The combination loading strategy provides a new approach for catalytic purification of complex waste gas
and its industrial application data offers important reference value for engineering scale-up.
关键词
Keywords
references
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