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Batch production method of doped modified calcium-based CO2 adsorbent spheres

A calcium-based adsorbent, mass production technology, applied in the direction of separation methods, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve problems related to the batch preparation of adsorbents, and achieve high industrial Application prospect, ease of extrusion, effect of slowing down the sintering phenomenon

Active Publication Date: 2021-01-29
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] The above-mentioned Chinese patent documents all focus on the laboratory research of calcium-based adsorbents, and do not include related work on the batch preparation of adsorbents

Method used

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  • Batch production method of doped modified calcium-based CO2 adsorbent spheres
  • Batch production method of doped modified calcium-based CO2 adsorbent spheres
  • Batch production method of doped modified calcium-based CO2 adsorbent spheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 1) Dissolve 3kg of calcium nitrate and 670g of aluminum nitrate (the molar ratio of calcium to aluminum is about 7:1) in 8L of deionized water, and mix to obtain a metal precursor solution; then dissolve 1.2kg of sodium hydroxide in 12L of deionized water After mixing, an alkali solution is obtained; the metal precursor solution and the alkali solution are mixed and stirred by a coprecipitation method, and then configured into a suspension;

[0055] 2) Stir the suspension continuously at a stirring speed of 300rpm, a co-precipitation temperature of 25°C, and a co-precipitation time of 24h; use a plate and frame filter press to wash and filter the stirred suspension to obtain a filter cake. The mass ratio of deionized water to suspension is 10:1; put the filter cake in a resistance furnace and dry at 100°C for 12 hours to obtain a dry filter cake, then crush the dry filter cake and put it in a resistance furnace at 600°C Roast for 2 hours to obtain the original powder of...

Embodiment 2

[0059] 1) The amounts of metal precursors, alkaline reagents and deionized water in this example are consistent with those in Example 1);

[0060] 2) Stir the suspension continuously at a stirring speed of 100rpm, a co-precipitation temperature of 10°C, and a co-precipitation time of 12h; use a plate and frame filter press to wash and filter the stirred suspension to obtain a filter cake. The mass ratio of deionized water to suspension is 10:1; put the filter cake in a resistance furnace and dry at 110°C for 10 hours to obtain a dry filter cake, then crush the dry filter cake and put it in a resistance furnace at 700°C Roasting for 1h, the original powder of doped modified calcium-based adsorbent is obtained;

[0061] 3) The molding process of the former powder of the calcium-based adsorbent made in the present embodiment is consistent with the steps described in Example 1);

[0062] The calcium-based adsorbent pellets synthesized in this example were subjected to CO 2 Adsor...

Embodiment 3

[0065] 1) Dissolve 20kg of calcium nitrate and 3.2kg of aluminum nitrate (the molar ratio of calcium to aluminum is about 10:1) in 25L of deionized water respectively, and mix to obtain a metal precursor solution; then dissolve 5kg of sodium hydroxide in 60L of deionized water After mixing, an alkali solution is obtained; the metal precursor solution and the alkali solution are mixed and stirred by a coprecipitation method, and then configured into a suspension;

[0066] 2) Stir the suspension continuously at a stirring speed of 200 rpm, a co-precipitation temperature of 20°C, and a co-precipitation time of 18 hours; use a plate and frame filter press to wash and filter the stirred suspension to obtain a filter cake. The mass ratio of deionized water to suspension is 15:1; put the filter cake into the resistance furnace and dry at 120°C for 6 hours to obtain a dry filter cake, then crush the dry filter cake and put it in the resistance furnace at 700°C Roast for 2 hours to obt...

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Abstract

The invention relates to a batch production method of doped modified calcium-based CO2 adsorbent spheres. The method comprises the following steps: mixing and stirring a metal precursor solution and an alkaline solution through a coprecipitation method to prepare a turbid liquid; stirring and filtering the turbid liquid to obtain a filter cake, and drying, roasting and crushing the filter cake toobtain raw powder of a doped modified calcium-based adsorbent ; mixing the raw powder of the calcium-based adsorbent with a binder, a peptizing agent, an extrusion aid and water, and performing full kneading to obtain a mixture bulk blank; and putting the blank into a banded extruder for banding, conducting breaking into short rod-shaped particles, putting the short rod-shaped particles into a rounding machine for high-speed grinding to obtain spherical particles, and naturally air-drying, drying and roasting the spherical particles to finally obtain the calcium-based adsorbent spheres. The adsorbent spheres have high adsorption performance, high sintering resistance, high crushing strength and high wear resistance, and are suitable for adsorption separation of high-temperature CO2 in fluegas of a thermal power plant.

Description

technical field [0001] The invention belongs to the field of batch production and preparation process improvement of calcium-based adsorbents, and relates to a doped modified calcium-based CO 2 Batch production method of sorbent pellets. Background technique [0002] Since industrialization, the excessive emission of greenhouse gases has accelerated global warming and climate change. Due to the heavy use of fossil fuels, CO 2 As one of the main components of greenhouse gases, its emissions are increasing year by year. CO 2 As one of the key technologies to control carbon emissions, Carbon Capture, Utilization and Storage (CCUS) technology has received more and more attention in recent years. [0003] Solid sorbent material as CO 2 One of the captured materials has become a research hotspot nowadays. Among them, calcium-based adsorbent has many advantages as a high-temperature solid adsorption material, such as wide source of raw materials, low price, fast adsorption ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/28B01D53/02B01J20/30
CPCB01J20/04B01J20/041B01J20/08B01J20/28019B01D53/02B01D2257/504Y02C20/40
Inventor 王胜平江涛马新宾赵玉军黄守莹王悦李茂帅
Owner TIANJIN UNIV
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