Process for preparing high-purity hydrogen by purifying palladium alloy membrane

A palladium alloy membrane, high-purity hydrogen technology, applied in the field of hydrogen membrane separation and purification, can solve the problems of insignificant advantages in re-investment and safety, failure to make full use of energy, and low operating flexibility, so as to promote chemical equilibrium movement and improve energy. Utilization and safety, the effect of low operating pressure

Pending Publication Date: 2020-09-22
SINOPEC NANJING RES INST OF CHEM IND CO LTD +1
View PDF11 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PSA equipment requires a lot of investment, small operating flexibility, high operating pressure, and no obvious advantages in terms of reinvestment and safety.
In the metal membrane separation process directly without PSA, in order to o

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for preparing high-purity hydrogen by purifying palladium alloy membrane
  • Process for preparing high-purity hydrogen by purifying palladium alloy membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] As shown in Figure 1, the palladium alloy membrane is used to purify hydrogen to obtain high-purity hydrogen. The device includes 1 is a desulfurization adsorption bed, 2 is a particle filter, 3 is a first gas storage tank, 4 is a first-stage booster pump, and 5 is a second storage tank. Gas tank, 6 is the primary heater, 7 is the primary metal palladium alloy membrane separator, 8 is the heat exchanger, 9 is the third gas storage tank, 10 is the secondary booster pump, 11 is the fourth gas storage tank , 12 is a secondary heater, 13 is a secondary metal palladium alloy membrane separator, and 14 is a regenerative heating furnace. The above device is connected by the pipeline according to figure 1 Connect in sequence. Among them, after the crude hydrogen enters the desulfurization adsorption bed, the crude hydrogen after filtering the particles enters the first gas storage tank, the pressurized and heated crude hydrogen enters the primary metal palladium alloy membrane...

Embodiment 2

[0035] The raw material gas is 81.7% crude hydrogen from methanol cracking gas, and the same device and process steps are used in the purification process as in Example 1.

[0036] After passing through the primary heater, the temperature is 290°C, and the pressure of the primary booster pump is 1.2MPa; after passing through the secondary heater, the temperature is 350°C, and the pressure after the secondary booster pump is 1.6MPa, and the secondary purification is 80% The hydrogen is fed into the primary inlet pipeline. Through heat exchange at the primary inlet and outlet and exhaust heat recovery, the temperature at the primary inlet can be increased to 74°C before passing through the primary heater. The purity of hydrogen after two-stage purification is 99.999%, the impurity content meets the national standard, and the utilization rate of crude hydrogen is 80%.

Embodiment 3

[0038] The raw material gas is 95.2% crude hydrogen from coal gas, and the same device and process steps are used in the purification process as in Example 1.

[0039] After passing through the primary heater, the temperature is 305°C, and the pressure of the primary booster pump is 0.9MPa; after passing through the secondary heater, the temperature is 310°C, and the pressure after the secondary booster pump is 1.0MPa, and the secondary purification yields 92% The hydrogen is fed into the primary inlet pipeline. Through heat exchange at the primary inlet and outlet and exhaust heat recovery, the temperature at the primary inlet can be increased to 58°C before passing through the primary heater. The purity of hydrogen after two-stage purification is 99.999%, the impurity content meets the national standard, and the utilization rate of crude hydrogen is 90%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a process for preparing high-purity hydrogen by purifying a palladium alloy membrane, which comprises the following steps: enabling crude hydrogen to pass through a desulfurization adsorption bed, a particle filter, a heater and a booster pump, then enabling the crude hydrogen to enter a metal palladium alloy membrane separator, and exchanging heat of outlet gas of a primary separator to an inlet through a heat exchanger; when the intercepted gas of the first-stage separator is introduced into the second-stage separator to be purified to a certain purity, converging the purified gas into an inlet gas pipeline of the first-stage separator, and using the regenerative heating furnace for recycling waste gas heat to further improve the energy utilization rate. The process is simple, clean and energy-saving; the prepared hydrogen is suitable for fuel cells, semiconductor devices, precise instruments and the like. Meanwhile, the requirement on the raw material gas isnot high, the used skid-mounted equipment is convenient to move, and high-purity hydrogen can be obtained by directly taking industrial hydrogen production as a raw material to realize on-site purification.

Description

technical field [0001] The invention belongs to the field of hydrogen membrane separation and purification, in particular to a hydrogen membrane separation and purification process. Background technique [0002] With the reduction of fossil energy and the arrival of bottlenecks in the development of power battery energy, as well as the excellent characteristics of hydrogen as a secondary energy source, such as good combustion performance, high efficiency, clean and pollution-free, and no greenhouse effect, the government and research institutions are paying attention Transferred to the direction of hydrogen energy. Recently, the National Development and Reform Commission and the National Energy Administration issued the "Energy Technology Revolution Innovation Action Plan (2016-2030)" within the system, and at the same time released the "Energy Technology Revolution Key Innovation Action Roadmap", proposing 15 key innovation tasks, Including technological innovations in cle...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01B3/50
CPCC01B3/50C01B3/505Y02P20/10
Inventor 江洋洋张楚璠孔京黄伟贺向坡
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap