· 논문명 : Chemical surface modification of cPVC-derived porous carbons to enhance CO2 and CH4 

                adsorption performances for H2 purification

· 저   자 : Phuong Uyen Do, Jae Hyeon Park, Hyeon Uk Kim, Chan Hyun Lee *

· 게재지 : International Journal of Hydrogen Energy (2025, 144, 1279-1291)

· 초록

This study introduces a surface modification process using NaBH4 as a novel agent to enhance the performance of chlorinated

polyvinyl chloride (cPVC)-derived porous carbon adsorbents for CO2/CH4 separation in hydrogen production. Using response

surface methodology for optimization, we treated the adsorbents with 1 M NaBH4 while varying the KOH/cPVC ratio and contact

time to improve their physicochemical properties. The results reveal that both the KOH/cPVC ratio and NaBH4 treatment duration

significantly influence pore structure and surface functional groups. The K24 sample—prepared with a KOH/cPVC ratio of two

and treated with NaBH4 for 40 min—exhibited the highest adsorption capacities, reaching 4.21 mmol/g for CO2 and 1.83 mmol/g

for CH4. This sample also demonstrated the largest narrow micropore volume (0.3662 cm3/g), further confirming the 

effectiveness of the modification process. These findings highlight the potential of NaBH4-treated cPVC-derived carbons as 

scalable, high-performance adsorbents for CO2 and CH4 capture in environmental applications.