Reaction and regeneration behavior of melamine with SO<sub>2</sub>

HU Xiaowei; LÜ Li; LIANG Bin; QIU Liyou; YUAN Shaojun; ZHENG Dongyao

doi:10.11949/j.issn.0438-1157.20180228

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Reaction and regeneration behavior of melamine with SO₂

更新时间：2025-12-10

- Reaction and regeneration behavior of melamine with SO₂
- CIESC Journal Issue 9, Pages: 4012-4018(2018)
- 作者机构：
  
  四川大学化学工程学院,四川,成都,610065
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20180228
  CLC： 626.43
- Online First：05 September 2018，
  
  Published：05 September 2018
- 稿件说明：
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HU Xiaowei, LÜ Li, LIANG Bin, et al. Reaction and regeneration behavior of melamine with SO₂[J]. CIESC Journal, 2018, (9): 4012-4018. DOI: 10.11949/j.issn.0438-1157.20180228.
DOI：

HU Xiaowei, LÜ Li, LIANG Bin, et al. Reaction and regeneration behavior of melamine with SO₂[J]. CIESC Journal, 2018, (9): 4012-4018. DOI: 10.11949/j.issn.0438-1157.20180228. DOI：

摘要

以固体有机胺三聚氰胺（MN）为脱硫剂，对MN与SO2反应及再生行为进行研究。结果表明，烟气组成0.35% SO2+5% O2+N2，40℃、4% MN（质量分数）条件下，MN可维持140 min脱硫率>99%，穿透硫容（出口SO2浓度200 mg/m3）0.33 g SO2/（g MN）。MN脱硫及再生产物XRD、FTIR、SEM及TG-MS等表征分析表明，MN与SO2反应首先生成三聚氰胺亚硫酸盐，随后被烟气中的氧气氧化为三聚氰胺硫酸盐，加入0.1%对苯二胺可有效抑制三聚氰胺亚硫酸盐氧化；三聚氰胺亚硫酸盐在75~150℃可加热再生，三聚氰胺硫酸盐不能加热再生。烟气含5% O2条件下，加入0.1%对苯二胺，三聚氰胺亚硫酸盐氧化率由36%降低至13%，150℃下再生2 h，再生率由58%提高至94%，MN抗氧二次脱硫性能优良。

Abstract

The reaction and regeneration behavior of melamine (MN)

a kind of solid organic amine

with SO2 was studied. The results show that MN desulfurization rate is above 99% for 140 min at simulated flue gas:0.35%SO2+ 5%O2 + N2

40℃ and 4% MN (mass fraction). Meanwhile

the breakthrough sulfur capacity (200 mg/m3 SO2 in outlet flue gas) is 0.33g SO2/(g MN). The analysis of MN desulfurization and regeneration products by XRD

FTIR

SEM and TG-MS shows that MN reacts with SO2 to produce melamine sulfite firstly

and then melamine sulfite is oxidized to melamine sulfate partly by oxygen in the flue gas. Adding 0.1% p-diphenylamine can effectively inhibit the melamine sulfite to be oxidized. Melamine sulfite can be heated and regenerated in 75-150℃

but the melamine sulfate cannot be regenerated by heating. The oxidation rate of melamine sulfite decreased from 36% at 5%O2 to 13% at 5%O2+ 0.1% p-diphenylamine. When products were heated at 150℃ for 2 h desulfurization

the regeneration rate of melamine increased from 58% at 5%O2 to 94% at 5%O2+ 0.1% p-diphenylamine. MN has excellent desulfurization and regeneration performance in the anti-oxidation mode.

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Reaction and regeneration behavior of melamine with SO2

DOI：10.11949/j.issn.0438-1157.20180228

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Reaction and regeneration behavior of melamine with SO₂