investigation of carbon monoxide gas adsorption on the al2o3/pd(no3)2/zeolite composite film

In this study, al2o3/pd(no3)2/zeolite composite films have been fabricated by roll coating method and characterized by x-ray diffraction, energy-dispersive x-ray spectroscopy and field emission scanning electron microscopy. the gas adsorption was tested in an experimental setup by a continuous gas analyzer kimo kigaz 210 at constant temperature and pressure (32 °c and 1.5 bar) and as a function of reaction time (s). the inlet co gas concentration was 150 mg l−1, and the saturation level of co gas concentration was 5 mg l−1. the maximum adsorption capacity (qmax) and maximum adsorption efficiency (%) were calculated as 111.16 mg g−1 and 97%, respectively. pseudo-first-order, pseudo-second-order, and intra-particle diffusion models were investigated to kinetic study of co adsorption on al2o3/pd(no3)2/zeolite adsorbents. results indicated that co adsorption follows the pseudo-second-order model well according to regression coefficient value (r2 = 0.98), and the value of pseudo-second-order rate constant of adsorption was obtained as 2 × 10−5 g mg−1 s−1. according to the intra-particle diffusion model, adsorption is affected by only one process. so, adsorption of co by al2o3/pd(no3)2/zeolite adsorbent indicated an effective adsorption by obtained results.