desulfurization catalyst picture |
Oxidative desulfurization is using an oxidizing agent to oxidize the sulfur compounds like thiophene in the fuel which are difficult to remove to sulfoxide or sulfone sulfur-containing materials with stronger polar in normal temperature, pressure and the presence of catalyst conditions, and then removing the sulfoxide or sulfone sulfur-containing materials by the methods like extraction, thus to achieve the goal of deep desulfurization. Oxidative desulfurization is considered to be a very attractive desulfurization technology, which usually consists of two steps: first, the fuel sulfide oxidation; second, removing the oxidized sulfur compounds from fuel oil by extraction, adsorption and distillation methods.
The key of desulfurization method is developing an oxidative desulfurization catalyst with good properties of high desulfurization rate, oil yield, and low cost. Research indicates that a kind of zirconium hydroxide as a carrier, then immerse in the aqueous solution constitute of ammonium metatungstate after finely crushed; the immersion liquid placed in an ultrasonic generator ultrasonic to promote the dipping, evaporating the water, dried, and roasting at the high temperature to generate the WO3/ZrO2 solid ultra-strong acid desulfurization catalyst. This catalyst exhibits good activity and selectivity, and high desulfurization rate when used for the deep desulfurization of diesel fuel.
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