A new technology for removing petroleum refining sulfur is in presence helpful. called The catalytic desulfurization process. This means that it is essential to lower the sulfur content in gasoline, diesel oil and other distillate petroleums order make environmental regulations and keep them as strict as possible, also minimizing discharge volumes of those harmful tap said it There are several technological features of this process. One such feature is that in practice a metal oxide, which also serves as the catalyst for this reaction, will convert the sulfur compounds to hydrogen sulfide, and then be removed. It is highly efficient and can operate at low pressures as well as low temperatures. This makes use good because it costs less than other methods, consumes less energy and produces fewer emissions. It is used throughout the petroleum industry in making cleaner-burning fuels, and also for processing natural gas and other hydrocarbon feedstocks.