Study on coadsorption of SO₂, NO, and CO₂ over copper‐supported activated carbon sorbent in different operating conditions

Abstract

Copper‐supported activated carbon (Cu‐SAC) was studied for the simultaneous removal of SO2, NO, and CO2 in different operating conditions. The effects of Cu loading, adsorption temperature, O2 concentration, and relative humidity (RH) were studied. The experimental results showed that Cu‐SAC containing 9.8% of Cu had the best removal activity of SO2, NO, and CO2. The activity dropped with the further increase of Cu loading. Higher temperatures were not in favor of simultaneous adsorption of SO2, NO, and CO2. The performances of the removal of SO2 and NO improved obviously in the presence of O2. Water vapor could improve the adsorption performance of SO2, but higher RH was bad for the adsorption performance of SO2. The adsorption of NO and CO2 was deterred in the presence of water vapor. Cu‐SAC was shown to be a potential sorbent for simultaneous adsorption of SO2, NO, and CO2. © 2015 American Institute of Chemical Engineers Environ Prog, 34: 1044–1049, 2015

CO2 Adsorption on N-Doped Porous Biocarbon Synthesized from Biomass Corncobs in Simulated Flue Gas

“…This may be due to the increase of water vapor content that created capillary condensation and blocked the pore structure . It was also possible that the carbonate generated by water vapor and CO 2 occupied the nitrogen active site . It was noted that water vapor had little effect on the adsorption capacity of CO 2 recycling with 8 vol % water vapor, indicating that there was no irreversible chemical reaction between water vapor and the biocarbon sample.…”

“…47 It was also possible that the carbonate generated by water vapor and CO 2 occupied the nitrogen active site. 48 It was noted that water vapor had little effect on the adsorption capacity of CO 2 recycling with 8 vol % water vapor, indicating that there was no irreversible chemical reaction between water vapor and the biocarbon sample. Above all, the cyclic adsorption capacity of CNNK-1 remained essentially constant in the complex flue gas, indicating that the sample had excellent regeneration ability and stability.…”

CuO supported on COK-12 and SBA-15 ordered mesoporous materials for temperature swing SOx adsorption

“…Alumina-supported copper adsorbents have been reported in the literature, but alumina may react with SO2 forming species more difficult to decompose which may compromise the performance and lifetime of the adsorbent [6,[9][10][11][12][13][14]. Activated carbon-supported copper adsorbents have also been investigated, but they have the drawback of retaining some SO3 by physisorption which complicates the adsorption-desorption process [7,[15][16][17]. SBA-15 ordered mesoporous silica-supported CuO adsorbents offer quite promising prospects.…”

Assessment of cationic dye biosorption onto anaerobic digested sludge: Spectroscopic characterization

“…Several authors have evaluated the production of activated carbon from low cost materials using for this purpose different types of agricultural residues, such as coconut shell , corncob and rice husk , among others. The production of activated carbon from sludge of different origins and their utilization for the removal of water pollutants has been also extensively studied .…”