Adsorption

Adsorptive hydrogen chloride and combined hydrogen chloride–hydrogen sulphide removal from biogas for solid oxide fuel cell application

“…The mass transport through the boundary layer surrounding the particles as well as the mass transport in the pores of the adsorbent forms the rate-determining step. With heats of adsorption >70 kJ/mol, as they can occur in chemisorption, according to Bathen and Ciprian (2006) an influence on the total kinetics is to be expected. Aluminium oxide-based sorbents offer a high surface area which can be processed by surface modifiers.…”

“…The adsorptive is transported through the macro and mesopores. They can be considered as accesses to the actual active surface (Bathen and Ciprian, 2006). A series of experiments on the elimination of H 2 S with adsorbents led to the initiation of this work.…”

“…In the adsorption tower design it is a limiting factor since apart from the tower height, the pellet size is decisive for the pressure drop (Donau Carbon GmbH, 2016). On the other hand, finely ground pellets provide shorter diffusion paths and this results in a larger mass transfer (Bathen and Ciprian, 2006). The sample preparation was carried out the following way.…”

“…Instead, the adsorption is concentrated from multi-component mixtures to the measurement of the breakthrough curve. In particular, this provides information on kinetics and dilution effects (Bathen and Ciprian, 2006). The activated carbon is impregnated with K 2 CO 3 , which allows a simultaneous adsorption of HCl and H 2 S. The reaction of K 2 CO 3 with HCl leads to potassium chloride (KCl) which has a bond dissociation energy of À436 kJ/mol (chemical reaction equation ( 2)).…”

Investigation of NH3 Influence on Adsorptive H2S Removal from Biogas for Solid Oxide Fuel Cell Application

“…Due to the steric selectivity, only molecules with a sufficiently small kinetic diameter can penetrate into the windows and adsorb in the cages. The various basic frameworks result from the so-called module which is determined by the ratio of SiO 2 to Al 2 O 3 [23].…”