Decomposition of limestone in a solar reactor

WREC 1996

i;-u1‘ :

PAUL

SCHERRER

-

INSTITUT

Decomposition of Limestone in a Solar Reactor A. lmhof Laboratory for Energy and Process Technology PaU Scherrei Inst!lute CH 5232 Vllligen PSI Swlizerland

Reaction CaCO,

T = 900 C CaO+CO, AH = 178 kJ/mol

ResultS (1995) Reactants Reactants feeding rate Inlet air flow rate Outlet air flow rate Solar-Input Degree of calcination ‘j Chemical conver. effic. *) Process efficiency ‘)

Cement Raw Materials = 25 kg/h = 80 kg/h = 160 kg/h = 56 kW at 800 W/m* 75% to 85% = 15% =88% CO+air+ CClO-fNtiCl

1) Degree of calcination = 1-(mol CaCO, in product / mol CaCO, in product) 2) Chemical conversion efficiency = AH ISolar-Input 3) Process efficiency = (sensible heat of air and particles +

AH)/Solar-Input

661

solar radiation

WREC 1996 -..

m

p A ” f_ s c H E R R E R , N s T, I ” T

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Beilage 2

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Cop-Mitigation in the Cement Production via Solar Energy A, Imhof; A. Steinfeld l.dboraiory

for Enerc~yand Process Tech,~olog) Paul Scherrer lnstt!ufe

Cii 5232 Vi~liqen PSI SwllzeriAw

Heliostats Transport piping

662

E

Al51

*)

A

Namib Desert Namibia (ca 0.3 Mill. km2)

Atacama Desert Peru/Chile (ca 0.2 Mill. km2)

Chihuahuan Desert Mexico (ca 0.3 Mill. km?)

Sonara Desert South-West USA (ca 0.3 Mill. kms)

INSTITUT

of Solar Engineering”,

”

MC Graw Hill

Solar insolation in Deserts

SCHERRER

Sahara EgyptlLibyalYali Niger/Chad/Sudan (ca 8 Mill. km*)

PAUL

Refernce: F: Krieth, J. Krieger: “Principles

ml

“/

Kalahari Desert Botswana/Namibia (ca 0.5 Mill. km*)

Mokay Desert Madagaskar

Australian Desert (ca 1.5 Mill. km*)

Thar Desert IndlalPaklsian (ca 0.3 Mill. km*)

Takla-Makan Desert West China @a 0.4 Mill. kms)

Saudis Arabia Desert e.g. Rub al Khali (ca 1.5 Mill. km*)

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