Page 58 - Adsorption, Ion Exchange & Catalysis- 2007, Elsevier - Copy

Else_AIEC-INGLE_cH002.qxd 6/20/2006 11:32 AM Page 54
54 2. Adsorption, Ion Exchange, and Catalysis

Catalysis may be of interest een on Mars. The Martian atmosphere consists of 95%
v
v
carbon dioxide and Breedlo v e et al . (2001) hae presented that nickel cluster catalysts
could be used in a photoelectrochemical process to split carbon dioxide, according to the
reaction

CO 2 →  v h CO 1 2 O 2

to provide both oxygen to support life systems and carbon monoxide, which can be used
as a substitute for hydrogen fuel, in a manned mission to Mars.

MULTIPLE CHOICE QUESTIONS

1. s to efer A value of 3 kcal/mol r
(a) physical sorption
(b) chemical sorption
(c) electrostatic sorption
2. Adsorption of a molecule is the r esult of
aals force v (a) the competitieness between repulsion and the v an der W
(b) the attraction of the molecule to the adsorbent’ s surf ace
(c) the repulsion between the cloud of electrons in atoms that form the surface and
those of the molecule

3. The most important property of an adsorbent is
(a) its shape
(b) the shape of its pores
(c) the number of its pores
(d) its pore structure
4. A pore with a diameter of 15 nm is cacterized as a har
(a) macropore
(b) mesopore
(c) micropore
(d) ultramicropore
5. Ion ehangers are able to xc
(a) remoe organic compounds from a solution v
(b) release ions when heated
(c) take up charged ions from a solution and release an equialent amount of other v
ions to the solution
6. Catalysts can
(a) accelerate chemical reactions
a (b) fvor reactions that would not take place otherwise
(c) increase the yield of a reaction by changing the equilibrium composition
(d) alter both the rate and the thermodynamics of a reaction