Offer 2

Multigradualness, high pressure and complexity of methanol synthesis technology and Dimethyl ether (DME) requier to search ways of synthesis of these products using new advanced technologies. The way to obtain the electro catalyst synthesis of methanol and Dimethyl ether from methane in a zone of low-temperature plasma is offered as the alternative. Selection of the equipment, manufacturing of laboratory electro catalyst reactors, preliminary researches on synthesis of methanol, Dimethyl ether and aldehydes were made to implement it. The plasma parameters were tested to give the product yield.

Short theoretical bases of a method. Synthesis of the radical of СН goes through the electro catalyst reactor where using of the catalysis (or catalysis mix) leads that the electric discharge in gas, the electromagnetic field and the ultra-violet flux are generated simultaneous. Exposed to the listed factors, the hydrogen proton detaches from the methane molecule:

СН₄→ СН + Н.

Parallel to this, there is the synthesis of carbon oxide (II) from carbon oxide (IV) exposed to the electric discharge in gas: there is a partial restoration of СО₂ to СО forming atom of oxygen:

СО₂ → СО + О .

To form enough oxygen-containing radicals and a proton in the catalysis mix, we have to synthesize oxygen-containing radicals НО и НО₂ in another block with the electro catalyst reactor using water vapour through the methane flux.

Gas fluxes from two blocks which contain the radical СН , oxygen-containing radicals НО and НО_2,, the hydrogen proton, oxygen atom and carbon oxides (II) and (IV) mixed up and had then process of DME synthesis.

Methanol and DME synthesis is implemented by followed reactions:

2СН + О → (СН₃)₂О

3СО + 6Н → (СН₃)₂О + СО₂

СН + Н₂О → СН₃ОН + Н

2 СН₃ОН → (СН₃)₂О + 2Н + О

The oxygen-containing radicals НО and НО₂ are necessary for assimilation of protons and atomical oxygen and suppression of the counter reactions.

The laboratory machine scheme of DME synthesis made of methane, carbon dioxide and water vapors.

Figure 4 – The laboratory machine of DME synthesis

We examined the laboratory machine changing the fluxes and parameter of discharge to see the different conditions of DME synthesis.

Analytical control of gas mixes was exercised by a chromatograph. We identified the peaks during the processing of chromatogramms receiving through the integral synthesis. The peaks conform to methanol and DME, synthesized in a zone of low-temperature plasma.

It is established that the electro catalyst synthesis of methanol and DME with a high output is reached under an atmospheric pressure and temperature 60-80º С. The comparative economic value of an electro catalytic way and the actual technology (2 step syntheses of СО+Н₂, СН₄+Н₂О+О₂ under 3,0 mPas, methanol under 30 mPas and 200ºС which is practiced in the industry) showed, that the offered technology has energy cost 2-3 times smaller in comparison of an industrial method.

Content of the proposal 2: Obligatory investments:

1. To examine, design, offer an alternative method of receiving methanol and DME in a zone of low-temperature plasma.

2. To produce carbon dioxide conversion of limiting hydrocarbons in a discharge zone instead of vapor conversion used in the actual industrial schemes.

3. To offer rational technological way how to process the limiting gas hydrocarbons of extraction of petrol into end products: highly octic fuel and DME.

Prof. Dr.-Ing. Stolyarenko G. S.

The composition of the natural gas varies as follows (depending on the field): methane – 55-99%, ethane – 1-10%; (propane + butane) – to 10%; C5 – hydrocarbons and more than 1-5%, the rest are nitrogen, carbon dioxide, sulfides, helium.

For receiving fuel and DME it is offered to use the raw materials, which are previously refined of sulfides and reduces pollution of the atmosphere in the cities and industrial centers. A number of technologies in industrial scale are introduced from technological stages of processing. It is reasonable to choose the technological scheme of methanol and DME production for a special unit.

The task is to process associated petrol gases, which are exposed to flare receiving a final end product. Hence, it will solve environmental problems in the region of oil extraction.

Дата добавления: 2015-08-18