Two-step preparation method for biomass material-based high-performance adsorbent

A biomass material and adsorbent technology, which is applied in the field of two-step preparation of high-performance adsorbents, can solve the problems of low metal chloride content, low thermal conductivity, and influence on mass transfer, etc., and achieves high adsorption component content and contact heat. The effect of small resistance and high adsorption performance

Inactive Publication Date: 2012-08-01
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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Problems solved by technology

However, limited by the porous medium carrier itself, the metal chloride content of this composite adsorbent is small, so its adsorption capacity for ammonia is limited by the metal chloride content.
In addition, this composite adsorbent improves mass transfer due to its well-developed por...

Method used

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  • Two-step preparation method for biomass material-based high-performance adsorbent

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Effect test

Embodiment 1

[0027] (1) Carbonization activated pore making: the raw materials used are: calcium chloride, fir sawdust, deionized water, and calcium chloride is used as the adsorbent. Firstly Chinese fir is crushed into 20 mesh spherical particles, then an aqueous solution of calcium chloride is prepared, the mass concentration is 40%, the mass ratio of calcium chloride and Chinese fir sawdust is 4: 1, the Chinese fir sawdust is immersed in the aqueous calcium chloride solution, and the immersion time is 24 hours. The mixture of fir sawdust and calcium chloride was filtered out, dried at 120°C for 24 hours, and then put into a tube furnace for carbonization and activation to prepare a composite adsorbent. The carbonization temperature is 500°C, the carbonization time is 2 hours, the carbonization atmosphere is nitrogen, the activation temperature is 500°C, the activation time is 2 hours, and the activation atmosphere is carbon dioxide.

[0028] (2) Filling: Mix the composite adsorbent pre...

Embodiment 2

[0031] (1) Carbonization activated pore-forming: the raw materials used are: barium chloride, corn cob, deionized water, and barium chloride is used as the adsorbent. First corn cobs are crushed into 10 mesh spherical particles, then barium chloride aqueous solution is prepared, the mass concentration is 30%, the mass ratio of barium chloride and corn cobs is 3: 1, the corn cobs are immersed in the barium chloride aqueous solution, the immersion time for 24 hours. The mixture of corncobs and barium chloride was filtered out, dried at 120°C for 24 hours, and then the mixture was carbonized and activated in a tube furnace to prepare a composite adsorbent. The carbonization temperature is 650°C, the carbonization time is 1 hour, and the carbonization atmosphere is argon. The activation temperature is 650°C, the activation time is 1 hour, and the activation atmosphere is carbon dioxide.

[0032](2) Filling: Mix the composite adsorbent prepared after carbonization and activation ...

Embodiment 3

[0035] (1) Activated pore formation by carbonization: The raw materials used are: strontium chloride, straw, deionized water, and strontium chloride is used as the adsorbent. First, the straw is crushed into 30-mesh spherical particles, then an aqueous solution of strontium chloride is prepared, the mass concentration is 50%, the mass ratio of strontium chloride and straw is 6:1, and the straw is immersed in the aqueous solution of strontium chloride for 24 hours . The mixture of straw and strontium chloride was filtered out, dried at 120°C for 24 hours, and then the mixture was carbonized and activated in a tube furnace to prepare a composite adsorbent. The carbonization temperature is 450°C, the carbonization time is 3 hours, and the carbonization atmosphere is vacuum. The activation temperature is 450°C, the activation time is 3 hours, and the activation atmosphere is carbon dioxide.

[0036] (2) Filling: Mix the composite adsorbent prepared after carbonization and activa...

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Abstract

The invention discloses a two-step preparation method for a biomass material-based high-performance adsorbent. By the preparation method, the heat conductivity and the mass transfer performance of the adsorbent can be improved at the same time. A metal chloride is inlaid in a biomass material by an immersion method; the adsorbent is prepared by a carbonizing and activating pore-forming method, and the mass transfer performance is improved; and metal powder is uniformly bonded on the outer surface of the granular adsorbent by a bonding agent, gaps among fins of a metal fin pipe heat exchanger are filled, the granular adsorbent on which the metal powder is bonded is sintered together by a sintering method, the adsorbent and the fin pipe heat exchanger are also sintered together at the same time, and an integrated heat exchange pipe with the adsorbent is formed. Due to the metal powder, the heat conductivity of the adsorbent is improved; and due to the tight combination between the adsorbent and the metal fin pipe, the contact heat resistance between the adsorbent and the heat exchanger is reduced. The prepared adsorbent is high in mass transfer rate, good in heat conductivity, high in adsorptive property and convenient to use.

Description

technical field [0001] The invention relates to the technical field of adsorption refrigeration, in particular to a two-step preparation method of a biomass material-based high-performance adsorbent. technical background [0002] Adsorption refrigeration technology has attracted more and more attention due to its simple structure, no moving parts, no pollution to the environment, and the ability to utilize waste heat and solar energy and other medium and low temperature heat sources. However, the lack of high-performance adsorbents limits the large-scale application of adsorption refrigeration. The adsorption working medium pair composed of silica gel, activated carbon, zeolite and other physical adsorbents and water has the advantage of low regeneration temperature, but the water absorption of physical adsorbents is generally only 10-20%, and the adsorption rate is slow, resulting in a large adsorption refrigeration system. The cost is high. Metal chlorides such as calciu...

Claims

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Application Information

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IPC IPC(8): B01J20/32B01J20/20
Inventor 卜宪标王令宝陆震能马伟斌
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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