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Method for preparing high-temperature CO2 adsorbent by utilizing dredging dianchi lake sediment

A CO2 and adsorbent technology, which is used in the preparation of CO2 adsorbents to achieve the effects of high CO2 adsorption performance and good cycle stability

Inactive Publication Date: 2018-10-09
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Production of CO from sediment 2 Although adsorbents have been reported, they are mainly carbon-based or SiO-containing 2 cryogenic CO 2 adsorbent, while the use of sediment as a silicon source to produce high-temperature CO 2 Adsorbents have not been reported yet

Method used

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  • Method for preparing high-temperature CO2 adsorbent by utilizing dredging dianchi lake sediment
  • Method for preparing high-temperature CO2 adsorbent by utilizing dredging dianchi lake sediment
  • Method for preparing high-temperature CO2 adsorbent by utilizing dredging dianchi lake sediment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: The preparation of high-temperature CO by dredging the bottom mud of Dianchi Lake 2 The adsorbent method comprises the following steps:

[0021] (1) Take the dehydrated dredged Dianchi Lake sediment, filter and wash it with deionized water for 3 times, remove branches, weeds and other impurities, dry it in an oven until the water content is 2%, and grind it to powder;

[0022] (2) According to the ratio of adding 20mL of acid mixture per 1 g of step (1) powder, add step (1) powder into hydrochloric acid-nitric acid mixture (hydrochloric acid-nitric acid mixture is hydrochloric acid and nitric acid in a volume ratio of 1:1 prepared by mixing the proportions), heated to 80°C, condensed and refluxed for 24 hours, removed the supernatant, centrifuged and washed with deionized water until the supernatant was neutral, and then dried in an oven at 100°C until the water content was 2%. , cooled and ground to obtain SiO-containing 2 samples, SiO in samples 2 The co...

Embodiment 2

[0026] Example 2: The preparation of high-temperature CO by dredging the bottom mud of Dianchi Lake 2 The adsorbent method comprises the following steps:

[0027] (1) Take the dehydrated dredged Dianchi Lake sediment, filter and wash it with deionized water for 4 times repeatedly to remove impurities such as branches and weeds, put it in an oven to dry until the water content is 1%, and grind it to powder;

[0028] (2) According to the ratio of adding 30mL of acid mixture per 1 g of step (1) powder, add step (1) powder into hydrochloric acid-nitric acid mixture (hydrochloric acid-nitric acid mixture is hydrochloric acid and nitric acid in a volume ratio of 3:1 prepared by mixing the proportions), heated to 85°C, condensed and refluxed for 20 hours, removed the supernatant, centrifuged and washed with deionized water until the supernatant was neutral, and then dried in an oven at 105°C until the water content was 2%. , cooled and ground to obtain SiO-containing 2 samples, SiO i...

Embodiment 3

[0032] Example 3: The preparation of high-temperature CO by dredging the bottom mud of Dianchi Lake 2 The adsorbent method comprises the following steps:

[0033] (1) Take the dehydrated dredged bottom mud of Dianchi Lake, filter and wash it with deionized water for 5 times repeatedly to remove impurities such as branches and weeds, put it in an oven to dry until the water content is 2%, and grind it to powder;

[0034] (2) According to the ratio of adding 25mL of acid mixture per 1g of step (1) powder, add step (1) powder into hydrochloric acid-nitric acid mixture (hydrochloric acid-nitric acid mixture is hydrochloric acid and nitric acid in a volume ratio of 4:1 Proportionally mixed), heated to 90°C, condensed and refluxed for 15 hours, removed the supernatant, centrifuged with deionized water until the supernatant was neutral, and then dried in an oven at 85°C until the water content was 1%. Cooling and grinding to obtain SiO-containing 2 samples, SiO in samples 2 conten...

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Abstract

The invention discloses a method for preparing a high-temperature CO2 adsorbent by utilizing dredging dianchi lake sediment. The method comprises the following steps: utilizing the dredging dianchi lake sediment as a silicon source and LiNO3 as a lithium source; mixing by using a solid phase method and calcining at a specific temperature to prepare a Li4SiO4-based high-temperature CO2 adsorbent. The adsorbent has superior CO2 adsorption performance at the temperature of 650 to 850 DEG C and has good cyclic stability under the conditions of variable temperature and variable pressure. The preparation method has the advantage that the cost of the Li4SiO4-based high-temperature CO2 adsorbent is reduced; in addition, a new way for disposing the sediment is provided for achieving the aim of treating wastes with wastes.

Description

technical field [0001] The invention relates to a method for preparing high-temperature CO2 by dredging the bottom mud of Dianchi Lake. 2 sorbent method, belonging to the CO 2 The technical field of preparation of adsorbent. Background technique [0002] As we all know, global warming has become an international hot topic. Climate change has caused a series of problems such as melting glaciers, rising sea levels, and drought, which seriously threaten the survival and development of human beings. The data released by the US Climate Organization (NOAA) on May 6, 2015 showed that the CO in the global atmosphere in March 2015 2 The monthly average concentration has reached 400 ppm, which means that the CO causing global warming 2 The trend towards increasing levels continues to intensify globally. Therefore, CO 2 The capture of is particularly important for controlling global warming. [0003] current for CO 2 The capture methods mainly include solution absorption, solid...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30B01D53/04B01D53/047
CPCB01D53/0462B01D53/047B01J20/04B01J20/103B01D2257/504B01J2220/4887Y02C20/40
Inventor 王君雅羊莹张太萍宁平
Owner KUNMING UNIV OF SCI & TECH
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