Method for producing hydrogen through adsorbing, reinforcing and reforming glycerinum

A technology for reforming hydrogen and glycerin, applied in the energy field, can solve problems such as reduced efficiency, and achieve the effects of easy scale, stable hydrogen concentration, and stable breakthrough time.

Active Publication Date: 2017-08-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The results show that the purity of hydrogen in the process can be maintained, but its pre-breakthrough time (the time to maintain high concentration) is reduced by more than 40% as the cycle progresses, resulting in a decrease in the efficiency of the entire process

Method used

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  • Method for producing hydrogen through adsorbing, reinforcing and reforming glycerinum
  • Method for producing hydrogen through adsorbing, reinforcing and reforming glycerinum
  • Method for producing hydrogen through adsorbing, reinforcing and reforming glycerinum

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Experimental program
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Effect test

Embodiment 1-5

[0032] Calcium salt (0.02mol) and cobalt salt were weighed according to the ratio in Table 1, dissolved in 50ml of water, dried overnight at 120°C, and the obtained product was calcined at 800°C for 4h in a muffle furnace to obtain a Ca-Co-O catalyst. In the glycerin adsorption enhanced reforming reaction, the fixed bed reactor is filled with Ca-Co-O catalyst, nitrogen is used as carrier gas, and 0.262h -1 Glycerol-water mixture with a concentration of 0.328 g / mL was introduced at a weight hourly space velocity of 550°C. After GC detection, the concentration of hydrogen in the product after 5 minutes of reaction is shown in Table 1 below.

[0033] Table 1

[0034] Example

Embodiment 6-11

[0036] Calcium nitrate (0.02mol) and cobalt nitrate with a molar ratio of 1:1 were dissolved in 50ml of water, dried overnight at 120°C, and the resulting product was calcined in a muffle furnace under the conditions of Table 2 to obtain a Ca-Co-O catalyst. In the glycerin adsorption enhanced reforming reaction, the fixed bed reactor is filled with Ca-Co-O catalyst, nitrogen is used as carrier gas, and 0.262h -1 Glycerol-water mixture with a concentration of 0.328g / mL was passed through at a weight hourly space velocity, and the reaction temperature was 550°Cn. The results of the concentration of hydrogen in the product after 5 minutes of reaction are shown in Table 2 by GC detection.

[0037] Table 2

[0038]

Embodiment 12-14

[0040] Calcium nitrate (0.02mol) and cobalt nitrate with a molar ratio of 1:1 were dissolved in 50ml of water, dried overnight at 120°C, and calcined at 800°C for 4h in a muffle furnace to obtain a Ca-Co-O catalyst. In the glycerol adsorption enhanced reforming reaction, the fixed bed reactor is filled with Ca-Co-O catalyst, nitrogen is used as the carrier gas, and the glycerol-water mixture with a concentration of 0.328g / mL is passed through at the weight hourly space velocity in Table 3 , the reaction temperature is 550°C. The results of the concentration of hydrogen in the product after 5 minutes of reaction are shown in Table 3 by GC detection.

[0041] table 3

[0042] Example

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Abstract

The invention discloses a method for producing hydrogen through adsorbing, reinforcing and reforming glycerinum. The method comprises the steps of filling a Ca-Co-O catalyst with functions of catalyzing and absorbing CO2 in a fixed bed reactor, and under the condition of adopting inert gas as a carrier gas, feeding glycerite with the concentration being 0.124 to 0.749g / ml at the weight hourly space velocity of 0.066 to 2.624h<-1>, wherein the reaction temperature is 400 to 700 DEG C; after the adsorption of the CO2 is saturated, carrying out catalyst regeneration for 0.1 to 6h at 500 to 1000 DEG C in the air atmosphere. The Ca-Co-O catalyst is prepared through the following steps of dissolving and mixing cobalt salt and calcium salt in water, and after drying, calcining for 1 to 10h at 500 to 1000 DEG C. The hydrogen obtained in the invention is aroundbout 95 percent in whole 30 circles of tests, meanwhile, the CO2 absorption breakthrough time is stabilized in 9min, and the catalyst is simple in preparation process and easy for mass production.

Description

technical field [0001] The invention belongs to the field of energy technology, and in particular relates to a method for hydrogen production by glycerol adsorption enhanced reforming. Background technique [0002] Biodiesel is a liquid fuel obtained through transesterification of animal fats, catering waste oils, vegetable oils and fats, etc. Abundant sources of raw materials, good reproducibility, and excellent combustion performance lead to the continuous expansion of the production scale of biodiesel. As a by-product of transesterification, about 100 kg of crude glycerol is produced for every ton of biodiesel produced. [0003] Hydrogen is a common clean energy carrier. It has excellent combustion performance, high calorific value, and the combustion product is only water, which has zero pollution to the environment. At the same time, the demand for hydrogen in the chemical and petroleum industries is also huge. The use of glycerol to produce hydrogen not only improves...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/32B01J23/78
CPCY02P20/584B01J23/78B01J23/002C01B3/326C01B2203/1088C01P2006/80
Inventor 余皓党成雄彭峰王红娟
Owner SOUTH CHINA UNIV OF TECH
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