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Technique for preparing mixed fuel of hydrogen and dimethyl ether from methanol

A technology of mixed fuel and process method, which is applied in the field of chemical industry, can solve the problems of high energy consumption, distilled water and reaction-generated water are not effectively used, and achieve the effects of high combustion calorific value, low cost and simple process

Inactive Publication Date: 2009-02-11
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method also has the disadvantage of high energy consumption, and the distilled water and reaction water produced in the production process have not been effectively utilized.

Method used

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  • Technique for preparing mixed fuel of hydrogen and dimethyl ether from methanol

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Experimental program
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Effect test

Embodiment 1

[0027] The flow chart of the process flow chart of methanol hydrogen production and dimethyl ether mixed fuel in this embodiment is shown in Fig. 1 . The specific process method of the present embodiment is as follows: methanol is mixed with water or the condensate obtained by the reaction, pure water is used when starting the process, the condensate obtained by the reaction is used after the reaction is started, and the amount of methanol in the reaction raw materials is controlled to be 64kg / h, The amount of water is 6.4 kg / h pure water. The mixed raw material is preheated to 90°C by the heat exchanger 6, sent to the vaporizer 2 for vaporization, and the vaporization temperature is 150°C, and the vaporized mixed raw material is heated to 190°C in the superheater 3, and then sent to the methanol steam reforming reactor The catalytic reforming reaction is carried out within 4, the reaction pressure is 0.2MPa, the temperature is 240°C, and the catalyst used in the reaction is C...

Embodiment 2

[0030] The flow chart of the process flow chart of methanol hydrogen and dimethyl ether mixed fuel in this embodiment is shown in Figure 1. When the process is started, the thermal load furnace 8 is used for heat supply. After the reaction is stable, the heat supply of the thermal load furnace 8 is gradually reduced. The heat transfer oil in the shell side of the device provides the heat generated by the methanol dehydration reaction to the vaporization, superheating and reforming reaction devices. The specific method of this embodiment is as follows: methanol is mixed with water or the condensate obtained by the reaction, pure water is used when starting the process, and the condensate obtained by the reaction is used after the reaction is started, the amount of methanol in the reaction raw materials is controlled to be 64kg / h, water The amount is 3.2kg / h. The mixed raw material is preheated to 80°C by the heat exchanger 6, and sent to the vaporizer 2 for vaporization at a va...

Embodiment 3

[0032] The process flow diagram of the process method of methanol hydrogen production and dimethyl ether mixed fuel in this embodiment is shown in Figure 1. When starting up, the thermal load furnace is used for heating. After the reaction is stable, the heat supply of the thermal load furnace is gradually reduced. The heat transfer oil provides the heat generated by the methanol dehydration reaction to the vaporization, superheating and reforming reaction devices. The specific method of this embodiment is as follows: methanol is mixed with water or the condensate obtained by the reaction, pure water is used when starting the process, and the condensate obtained by the reaction is used after the reaction is started, the amount of methanol in the reaction raw material is controlled to be 80kg / h, water The amount is 16kg / h. The mixed raw material is preheated to 90°C by the heat exchanger 6, sent to the vaporizer 2 for vaporization, and the vaporization temperature is 200°C, and...

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Abstract

The invention discloses a technical method for producing mixed fuel of hydrogen and dimethyl ether by using methanol, and belongs to the field of chemical engineering. The technical method couples the methanol-steam reforming reaction and the methanol dehydration reaction in a technology through the control of the proportion of the using amounts of methanol and water which enter a methanol-steam reforming reactor and the proportion of the using amounts of catalysts for the methanol-steam reforming reaction and the methanol dehydration reaction, the heat which is released by the methanol dehydration reaction is provided for the gasification, the overheating and the methanol-steam reforming reaction through a heat carrier of the shell side of a device, water which is generated by the methanol dehydration reaction is utilized in the methanol-steam reforming catalytic reaction after the cooling and the condensation, thereby effectively utilizing the heat which is released by the dehydration reaction, saving a heat supply energy source which is arranged outside a system, effectively utilizing the water which is generated by the dehydration reaction and reducing the consumption of purified water; at the same time, the invention provides a high heating value novel clean mixed fuel, the cost is low, and the mixed fuel can replace liquefied petroleum gas or high-pollution water gas which is used in small and medium-sized enterprises for supplying the heat.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, in particular to a process method for preparing hydrogen and dimethyl ether mixed fuel with methanol. Background technique [0002] Due to the increasing scarcity of non-renewable resources, rising international crude oil prices, natural gas and other resources are difficult to obtain in some areas, and other factors, promote the continuous development of clean and effective alternative fuel industry. As an important clean energy, hydrogen has been widely used in many fields; dimethyl ether has a high combustion calorific value, and no NO will be produced during the combustion process. X And CO and other harmful gases, is also an ideal alternative fuel. However, the processes for preparing hydrogen or dimethyl ether alone have the disadvantage of high energy consumption. [0003] Hydrogen production methods include traditional water electrolysis hydrogen production, hydrogen productio...

Claims

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Application Information

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IPC IPC(8): C10L3/00
Inventor 张晓阳胡志彪凌华招刘京林李倩黄宏刘婷
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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