EURO-ECO 2011 Hanover 21 - 22 November 2011	Environmental, Engineering - Economic and Legal Aspects for Sustainable Living
	European Academy of Natural Sciences, Hanover European Scientific Society, Hanover University of Bremen, Bremen

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In conjunction with world modern tendencies of hydrocarbon processing industry development and great content of hydrogen sul?de in the associated oil gases the problem of H₂S utilization for hydrogen production is especially actual for Kazakhstan, because H₂S is known as one of the most toxic environment pollutant. There are many studies focused on the environmental applications of heterogeneous photocatalysis.

In the present study for photocatalytic decomposition of H₂S Ti, Fe and Ti-Fe - systems were selected for hydrogen and sulfur production. Ti, Fe and Ti-Fe – catalysts were prepared by pillaring of montmorillonite (MM) in Na - form by iron, titanium and their mixture.

The process of hydrogen sul?de photocatalytic decomposition under ultraviolet irradiation (UV) was studied in the quartz reactor at the range of space velocities from 60 – to 425 hour^-1. A mercury – quartz lamp source of intensity 100 W was used. Each experiment was carried out using 2,5 ml of catalyst. Under solar irradiation experiment was studied in the quartz reactor at the range of space velocities 17 - 325 hour^-1. The volume of catalyst was 12 ml. A concentrator of solar energy (CSE) was used as a source of irradiation. The catalysts before experiment were pre–sulfurized at 500°C during 2 hours.

The data of samples activity are presented in the table.

Table – An activity of catalysts under Uv and solar irradiation

	UV - irradiation			Solar - irradiation
	?, hour-1	t, mins	a, %	?, hour-1	t, mins	a, %
FeNaMM	60 330 425,0	40 27 24	100 93,1 91,1	17,3 104,5 199,2	40 23 15	100 98,3 96
TiNaMM	145,2 269,5 377,4 556,2	40 40 25 23	100 94,8 91,3 95,9	18,3 119,3 142,6 323,9	43 20 14 6	100 96,5 96 94
Ti-FeNaMM	60 320 420	40 30 25	100 93,7 91,7	27,5 99 191,3	43 25 21	100 99 96

? – space velocity, hour^-1; t –time, mins; a –conversion;%

It was shown that the action of UV – irradiation catalysts more effective than the solar irradiation. The catalysts are located in the line TiNaMM>Ti-FeNaMM>FeNaMM by activity in photocatalytic decomposition of H₂S.

Some characteristics of synthesized samples, it’s phase composition and particles dispersion were determined by physical – chemical methods (EM, BET, XRD, Mossbauer spectroscopy).

The work is partially supported by ISTC (project No. K 14-76)