Emmett Teller Analysis

. Experimental
2.1 Catalyst preparation
In this paper we have to use different types of nitrate precursors to preparation of the catalysts. The precursors we used to preparation of the catalysts are cobalt nitrate, cerium nitrate, copper nitrate and manganese nitrate. All the chemicals are used for manufacturing of the catalyst are A.R. grade and they are purchased from Otto Chemie Company. The different types of nitrate precursors was used to preparation of the catalyst and they are dried at 120°C for 12 hr in an oven and then calcination at 300oC for 2hr in a furnace. The calcination of the precursors is done just before the activity measurement of the catalyst. The calcination of different nitrate precursors was carried out in three ways;

The isotherm was recorded by Micromeritics ASAP 2020 analyzer and the physical adsorption of N2 at the temperature of liquid nitrogen (-196oC) with a standard pressure range of 0.05-0.30 P/Po.
2.3 Catalytic Activity Measurement
After annealing the catalyst bed, it was cooled to room temperature in the same conditions as we used for reactive calcination. The CO oxidation was analysis by gas chromatogram to measure the activity of the catalyst. The oxidation of CO was carried out to measure the activity of resulting catalyst.
2CO + O2→2CO2 -------------------- (1)
The oxidation of CO was carried out under the following reaction conditions: 100mg of catalyst with feed gas consisting of a lean mixture of 2.5 vol.% CO in air and total flow rate is maintained 60 mL/min. The air feed into the reactor was made free from moisture and CO2 by passing through it CaO and KOH pellet drying towers. The catalytic experiment was carried out in steady state conditions and the reaction temperature was increased from room temperature to 200oC with a heating rate of

For controlling the heating temperature of the catalyst presence in a reactor is done by a micro-processor based temperature controller. The gaseous products are produced after the oxidation reaction in a reactor is analysis by an online gas chromatogram (Nucon series 5765) equipped with a porapack q-column, FID detector and a methaniser for measuring of the concentration of CO and CO2. The oxidation of CO at any instant was calculated on the basis of concentration CO in the feed and product stream by the following equations:
(XCO) = [(CCO)in - (CCO)out ] / [CCO]in = [(ACO)in - (ACO)out ] / [ACO]in --------------- (2)
Where, the concentration of CO is proportional to the area of chromatogram ACO. The overall concentration of CO in the inlet stream is proportional to the area of CO2 chromatogram.
3. Results and discussions
The characterization of the different types of nitrate precursors prepared catalyst is done by following techniques and the activity of the catalyst for CO oxidation was discussed below.
3.1 Catalyst characterization
The characterization of the catalyst is provide information about the morphology, surface area, binding energy, pore size, pore volume, chemical state, material composition and the percentages of different materials presence in a catalyst.
3.1.1 Scanning electron microscopy