## 4 Results and Discussion
The CO2 adsorption capacities acquired at 100 kPa pressure and temperatures ranging from 0 to 30 \({}^{\circ}\)C are detailed in Figure 6:3 The values confirm the conclusions drawn from Figure 6:4  
As a result of cold nitrogen plasma modification, there was a slight increase in CO2 adsorption compared to the original carbon. However, we present preliminary studies here, in which the goal was to demonstrate that cold nitrogen plasma modification can be conducted in such a way that without reducing the values of textural parameters crucial for CO2 adsorption, only the nitrogen content on the surface increases, leading to an enhancement in CO2 adsorption. To the best of our knowledge, this is the first such report. Although [PERSON] et al. [46] conducted a study on the impact of nitrogen plasma modification on CO2 adsorption, they did not achieve an increase in CO2 adsorption, only a slight decrease. Experimental data of CO2 adsorption at temperatures of 0, 10, 20, and 30 \({}^{\circ}\)C on pristine plasma samples (DT0) and those modified by N2 (DT0_1, DT0_2) were fitted to Sips, Toth, Radke-Prausniz, Langmuir, and Freundlich equations. Mathcad Prime 7.0.0.0 was used to determine which of the abovementioned models best described the experimental data. Five mcdx files were created to perform calculations for each model (Supplementary Material data: Model_1_Sips_ang.mcdx, Model_2_Toth_ang.mcdx, Model_3_R_P_ang.mcdx, Model_4_Langmuir_ang.mcdx, and Model_5_Freundlich_ang.mcdx). The parameter values of the models and HYBRID values for the temperatures of 0 \({}^{\circ}\)C, 10 \({}^{\circ}\)C, 20 \({}^{\circ}\)C, and 30 \({}^{\circ}\)C were calculated based on the experimental data (Supplementary Material data: Data.xlsx). The obtained results were collected in an Excel file (Supplementary Material data: Models results.xlsx). The lowest HYBRID values were obtained for the Toth model. The parameters of Equation (3) at different temperatures  
\begin{table}
\begin{tabular}{l l l l l l l l l} \hline \hline \multicolumn{6}{c}{**The CO2 Adsorption at 100 kPa [mmol/g]**} & \multicolumn{6}{c}{**Percentage Increase in CO2 Adsorption**} \\ \hline  & 0 \({}^{\circ}\)C & 10 \({}^{\circ}\)C & 20 \({}^{\circ}\)C & 30 \({}^{\circ}\)C & 0 \({}^{\circ}\)C & 10 \({}^{\circ}\)C & 20 \({}^{\circ}\)C & 30 \({}^{\circ}\)C \\ DT0 & 3.2 & 2.6 & 2.08 & 1.67 & & & & \\ DT0\_1 & 3.24 & 2.65 & 2.13 & 1.72 & 1.  
and HYBRID values are presented in Figure 6:5 The values of the coefficient \(n_{T}\) are far from unity, indicating the heterogeneity of the surface of all carbons. The isosteric heat of adsorption (Q\({}_{iso}\)) is very important to gain deeper insights into the interaction between the adsorbed molecules and the internal surface of the adsorbent. Q\({}_{iso}\) gives a direct assessment of the intensity of the binding forces between the adsorbate molecules and the surface of the adsorbent. The isosteric heat of adsorption is ascertainable through the application of the Clausius-Clapeyron equation, as follows:  
Figure 6:6  
To utilize Equation (9), the Toth equation and parameters from Table 3 were used to calculate the pressure values corresponding to the seven levels of adsorption. The determination of pressure from Equation (3) is not algebraically feasible. Therefore, numerical methods were employed. Mathcad Prime 7.0.0.0 (Supplementary Material data: Adsorption Model_2_Toth ang.mcdx) was utilized to compute the pressure values for corresponding surface loadings levels (q). The obtained values have been compiled in the file (Supplementary Material data: Models results.xlsx, Toth model sheet). Plotting In(p) against the inverse of absolute temperature (1/T) for each loading, straight lines were obtained, with a slope of \(-\)Q\({}_{iso}\)/R (Figure 12). This approach allows for the determination of the heat of adsorption across all relevant loading (see Figure 13). This graph is crucial, as it provides insight into the energetic uniformity of the surface under investigation.