The use of a combination of activated carbon and nickel microfibers in the removal of hydrogen cyanide from air

Adsorption/desorption of low concentration of carbonyl sulfide by impregnated activated carbon under micro-oxygen conditions

“…Density function theory (DFT) was used to analyze the pore structure parameters, including micro-pore volume, pore volume, and average pore size [26][27][28]. A comparison between AC and Cu-Co-KW shows that the impregnation causes a decrease in the volume of pores smaller than 2 nm, which is accounted for 87.32% of the total pore volume reduction.…”

Kinetics and optimization of L-tryptophan separation with ion-exchange chromatography

“…It has been extensively applied in the description of adsorption and breakthrough behavior in fixed beds regardless of the properties of adsorbate, adsorbent and information of the fixed bed [11,25,26]. The Yoon-Nelson equation pertaining to a single-component system has the following form: (8) where K YN is the Yoon-Nelson rate constant (min −1 ); τ, the time required for 50% breakthrough of absorbate (min).…”

The highly efficient removal of HCN over Cu8Mn2/CeO2 catalytic material

“…The Yoon and Nelson's equation was introduced to describe the breakthrough behaviour of HCN over Cu 8 Mn 2 /CeO 2 . 28 where C 0 was the inlet concentration of HCN, mg m −3 ; C referred to the breakthrough concentration of HCN, mg m −3 ; t was the breakthrough time, min; τ was the time required to obtain 50% breakthrough, min −1 ; k was the lumped shape factor of breakthrough, min −1 .…”