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Photocatalytic Degradation of Carcinogenic N-Nitrosodiethylamine (NDEA) in Amine-Based CO₂ Capture Using Carbon Nitride under Visible Light

可視光下における炭素窒化物を用いたアミン系CO₂回収中の発癌性N-ニトロソジエチルアミン（NDEA）の光触媒分解 (AI 翻訳)

Muhammad Zafar1, Sarmad Hassan2, Aqeel Afzal1, Muhammad Muneer3*, Muhammad Sohaib Azeem4

Zenodoプレプリント2026-05-17#CCUS
DOI: 10.5281/zenodo.20251168
原典: https://zenodo.org/records/20251168
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🤖 gxceed AI 要約

日本語

アミンを用いたCO₂回収プロセスで生成する発癌性ニトロソアミン（NDEA）を、可視光照射下で炭素窒化物光触媒を用いて分解する手法を検討。UV-VisとHPLCで分解を追跡し、効率的な除去を確認。エネルギー効率の高いNDEA除去法としてCCUSの安全性向上に寄与。

English

This study investigates the photocatalytic degradation of NDEA, a carcinogenic nitrosamine formed in amine-based CO₂ capture, using carbon nitride under visible light. UV-Vis and HPLC monitoring confirmed significant degradation and complex pathways. The method offers an energy-efficient approach to mitigate health risks in CCS operations.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

日本ではCCSの実証実験が進んでおり、アミン法の安全性向上は重要。本研究成果は、副生成物処理の実用化に資する基礎的知見を提供する。

In the global GX context

Amine-based CO₂ capture is a leading CCS technology globally, but nitrosamine formation poses health risks. This study demonstrates a visible-light photocatalytic solution to degrade NDEA, contributing to safer CCS deployment.

👥 読者別の含意

🔬研究者:Provides a photocatalytic degradation pathway for NDEA using carbon nitride under visible light, relevant to CCS byproduct management.

📄 Abstract（原文）

This study aimed to degrade Nitrosodiethylamine (NDEA), a carcinogenic compound formed during CO2 capture processes due to the use of amines. CO2 emissions are one of the major contributors to global warming, and although various techniques have been developed for carbon capture, amine-based technologies remain among the most effective. However, these systems lead to the formation of hazardous nitrosamines such as NDEA. In this study, NDEA degradation was investigated under visible light (sunlight simulator) using a photocatalyst in the presence of amines, i.e., Monoethanolamide (MEA) and Diethanolamine (DEA), to simulate real-time CO2 capture conditions. Carbon nitride (C3N4) was synthesized using the thermal condensation method from urea and utilized to enhance surface area and maximize light absorption for effective electron activation and pollutant removal. UV-Vi’s spectrophotometry was employed to monitor the degradation of NDEA in both catalytic and non-catalytic systems over a wavelength range of 325 nm to 1100 nm. The results indicated significant degradation with noticeable variations in absorbance due to the formation of intermediate products. A validated HPLC method using gradient elusion was further applied to quantify NDEA degradation and confirm the formation of multiple degradation products, indicating a complex degradation pathway. The findings demonstrate that while UV-Vis provides rapid monitoring of degradation trends, HPLC enables precise quantification and differentiation between NDEA and its byproducts. The study confirms that photocatalytic degradation using carbon nitride under visible light is an energy-efficient and effective approach for the removal of NDEA from amine-based CO2 capture.

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