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<p>The rapid growth of automobile usage has contributed to elevated ambient carbon monoxide (CO) concentrations, posing significant public health risks. To address these concerns, ceria–alumina-supported copper-based catalysts were synthesized using two variants of the Incipient Wet Impregnation method for application in automotive exhaust treatment. Comprehensive physicochemical analyses—including CHNS elemental analysis, thermogravimetric analysis (TGA), field emission scanning electron microscopy (FE-SEM), Brunauer–Emmett–Teller (BET) surface area measurements, Fourier transform infrared spectroscopy (FT-IR), and X-ray diffraction (XRD)—were performed to elucidate the catalysts’ composition, thermal stability, textural properties, and crystalline structure. The impact of carbon dioxide (CO<sub>₂</sub>) interference on CO oxidation was systematically investigated by evaluating CO and CO<sub>₂</sub> removal efficiencies and catalyst selectivity. To mitigate CO<sub>₂</sub>-induced suppression of catalytic activity, a secondary CO<sub>₂</sub> adsorbent-packed bed was incorporated upstream of the catalyst bed. Performance evaluations were conducted under cold start and accelerated operating conditions using horizontal packed-bed reactors installed in the tailpipe of a legacy Maruti-Suzuki 800 DX vehicle. Response Surface Methodology (RSM) was employed to validate experimental findings and optimize catalyst loading and operating parameters. Results indicate that increasing catalyst dosage and integrating an appropriate CO<sub>₂</sub> adsorbent substantially reduce CO<sub>₂</sub> interference, thereby enhancing overall CO oxidation efficiency. These findings provide a promising pathway for improving emission control in aging vehicle fleets.</p>

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Selective interference of carbon dioxide (CO2) during the catalytic conversion of carbon monoxide (CO) from automobile exhaust using portable horizontal packed beds

  • 期刊论文

  • 发表日期：

    2026年7月6日

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  • Debojyoti Das,
  • Diptanshu Biswas,
  • Anindya Mukherjee,
  • Souvik Das,
  • Ujjaini Sarkar

摘要

The rapid growth of automobile usage has contributed to elevated ambient carbon monoxide (CO) concentrations, posing significant public health risks. To address these concerns, ceria–alumina-supported copper-based catalysts were synthesized using two variants of the Incipient Wet Impregnation method for application in automotive exhaust treatment. Comprehensive physicochemical analyses—including CHNS elemental analysis, thermogravimetric analysis (TGA), field emission scanning electron microscopy (FE-SEM), Brunauer–Emmett–Teller (BET) surface area measurements, Fourier transform infrared spectroscopy (FT-IR), and X-ray diffraction (XRD)—were performed to elucidate the catalysts’ composition, thermal stability, textural properties, and crystalline structure. The impact of carbon dioxide (CO₂) interference on CO oxidation was systematically investigated by evaluating CO and CO₂ removal efficiencies and catalyst selectivity. To mitigate CO₂-induced suppression of catalytic activity, a secondary CO₂ adsorbent-packed bed was incorporated upstream of the catalyst bed. Performance evaluations were conducted under cold start and accelerated operating conditions using horizontal packed-bed reactors installed in the tailpipe of a legacy Maruti-Suzuki 800 DX vehicle. Response Surface Methodology (RSM) was employed to validate experimental findings and optimize catalyst loading and operating parameters. Results indicate that increasing catalyst dosage and integrating an appropriate CO₂ adsorbent substantially reduce CO₂ interference, thereby enhancing overall CO oxidation efficiency. These findings provide a promising pathway for improving emission control in aging vehicle fleets.