This thesis discusses several commercial sorbents for Direct Air Capture (DAC) technology to reduce carbon dioxide (CO2) emissions and slow climate change. The main goal is to assess how effectively different adsorbent materials perform in terms of CO2 collection in dry and humid conditions. Lewatit VP OC 1065, DIAION HP20, DIAION WA20, DIAION HP2MGL, and Polyethylenimine on silica are among the experimental materials that have been studied. By generating the breakthrough curves from the experimental results for each sorbent mentioned above, the adsorption capacity of each material was evaluated under dry and humid conditions.

The results of the investigation show that the investigated materials' adsorption efficiency and capacity varied significantly. Notably, Polyethylenimine on silica had a comparatively lower adsorption capacity compared to Lewatit VP OC 1065, which demonstrated higher adsorption performance. The adsorption capacity of all materials was higher when water vapor was present, albeit with longer adsorption periods.

Based on the breakthrough curve, Lewatit VP OC 1065 shows the highest adsorption capacity under both dry and humid conditions, which is 0.63 mmol/grams and 1.16 mmol/grams respectively. To find out the best working conditions, more tests should be done on different adsorbent materials. Also, more adsorbents should be investigated for better adsorption capacity.