Photocatalytic Decomposition of Chloroform in a Fully Irradiated Heterogeneous Photoreactor using titanium oxide particulate suspensions

C.A. MARTÍN, M.A. BALTANÁS Y A.E. CASSANO

CATALYSIS TODAY

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 1996 vol. 27 p. 221 - 227

0920-5861

The photocatalytic decomposition of HCCI3 was studied in a fully irradiated photoreactor (FIP) by varying the concentrationsof (a) chloroform, (b) dissolved oxygen and (c) titania, as well as (d) the local volumetric rate of energy absorption (LVREA).Fully irradiated conditions are achievable when all the particles along the light path 'see the photons'. In order to compute theVREA (average value of the LVREA), the radiative transfer equation (RTE) was applied to the reactor and solved using asimplified radiation model. Model parameters, i.e., optical properties, as well as the boundary condition for the RTE wereobtained experimentally.Initial rate data of the chloroform decomposition showed that, within the studied range of process variables and under fullyirradiated conditions: ( 1 ) The reaction rate is of first order with respect to [HCCla], zero order with respect to [02] and aboutone-half-order with respect to the LVREA inside the reactor and (2): The effects due to catalyst concentration are fully accountedfor within the LVREA dependence.C.A. Martín, M.A. Baltanás y A.E. Cassano, "Photocatalytic Decomposition of Chloroform in a Fully Irradiated Heterogeneous Photoreactor using titanium oxide particulate suspensions". Catalysis Today, 27, 221 (1996). ISSN 0920-5861