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Method for removing potassium ions, calcium ions and magnesium ions in fast-growing eucalyptus

A potassium ion and calcium ion technology is applied in the field of high-value utilization of wood fiber, which can solve problems such as affecting the pyrolysis speed, and achieve the effects of simple and efficient treatment method, energy saving and low price.

Inactive Publication Date: 2020-02-21
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the increase of pyrolysis temperature, calcium ions and magnesium ions affect the pyrolysis rate.
At present, there is no report on the removal of wood metal ions before the pyrolysis of fast-growing eucalyptus

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The method for removing potassium ions, calcium ions and magnesium ions in fast-growing eucalyptus of the present invention comprises the steps:

[0020] (1) After peeling the fast-growing eucalyptus, cut it into eucalyptus chips with a length of 10 mm, a thickness of 3 mm, and a width of 9 mm, air-dry them, seal them and store them to balance moisture, and obtain eucalyptus chips with a moisture content of 8% for subsequent use;

[0021] (2) Add ultrapure water to the eucalyptus chips in step (1), add 6mL of ultrapure water per gram of eucalyptus chips, and use a concentration of 0.1mol / L hydrochloric acid to adjust the pH value of the mixed material to 3. The reaction was carried out for 90 minutes. After the reaction, the eucalyptus chips and the reaction solution were separated to obtain eucalyptus chips of fast-growing eucalyptus with potassium ions, calcium ions and magnesium ions removed, and a hydrolyzed solution containing potassium ions, calcium ions and magnes...

Embodiment 2

[0028] The method for removing potassium ions, calcium ions and magnesium ions in fast-growing eucalyptus of the present invention comprises the steps:

[0029] (1) After peeling the fast-growing eucalyptus, cut it into eucalyptus chips with a length of 12 mm, a thickness of 4 mm, and a width of 8.5 mm, air-dry them and store them sealed to balance moisture, and obtain eucalyptus chips with a moisture content of 10% for subsequent use;

[0030] (2) Add ultrapure water in the eucalyptus chips of step (1), add 6.5mL ultrapure water for every gram of eucalyptus chips, use the hydrochloric acid that the concentration is 0.15mol / L to adjust the pH value of this mixed material to be 6, at 160 ℃ React under the conditions for 40 minutes, separate the eucalyptus wood chips and the reaction solution after the reaction, and obtain fast-growing eucalyptus wood chips with potassium ions, calcium ions and magnesium ions removed, and a hydrolyzed solution containing potassium ions, calcium i...

Embodiment 3

[0034] The method for removing potassium ions, calcium ions and magnesium ions in fast-growing eucalyptus of the present invention comprises the steps:

[0035] (1) After peeling the fast-growing eucalyptus, cut it into eucalyptus chips with a length of 15 mm, a thickness of 5 mm, and a width of 8 mm, air-dry them and seal them for moisture balance, and obtain eucalyptus chips with a moisture content of 12% for subsequent use;

[0036] (2) Add ultrapure water in the eucalyptus chips of step (1), add 7mL ultrapure water for every gram of eucalyptus chips, use the sodium hydroxide solution that the concentration is 0.1mol / L to adjust the pH value of this mixed material to be 9, in React at 140°C for 10 minutes. After the reaction, separate the eucalyptus chips and the reaction solution to obtain fast-growing eucalyptus chips from which potassium ions, calcium ions and magnesium ions have been removed, and a hydrolyzed solution containing potassium ions, calcium ions and magnesium...

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Abstract

The invention discloses a method for removing potassium ions, calcium ions and magnesium ions in fast-growing eucalyptus. The method comprises: peeling fast-growing eucalyptus, cutting into eucalyptussheets with a length of 10-15 mm, a thickness of 3-5 mm and a width of not more than 10 mm, carrying out air drying, carrying out sealed storing, balancing the moisture, adding ultrapure water, regulating the pH value of the mixed material to 3-9, reacting for 10-90 min at 140-180 DEG C, and separating the eucalyptus sheets from the reaction solution after the reaction is finished so as to obtainthe eucalyptus sheets free of potassium ions, calcium ions and magnesium ions. According to the invention, in a research process, innovatively hydrothermal pretreatment can remove metal ions from eucalyptus, so that potassium, calcium and magnesium in fast-growing eucalyptus are efficiently removed by utilizing an environment-friendly hydrothermal pretreatment process so as to easily achieve thesubsequent lignocellulose pyrolytic reaction, achieve the high-valued utilization of lignocellulose and provide a new thought for controlled obtaining of chemical components of the bio-oil.

Description

technical field [0001] The invention relates to the field of high-value utilization of wood fiber, in particular to a method for removing potassium ions, calcium ions and magnesium ions in fast-growing eucalyptus. Background technique [0002] Woody biomass is the most abundant organic resource on earth, and exploiting the chemical energy of woody biomass is crucial to the sustainable development of the world economy. Research in this area is currently receiving a lot of attention, and fast pyrolysis has emerged as one of the most promising methods to obtain bio-oils. Mineral elements are important components of woody biomass materials, and metallic elements are known to catalyze pyrolysis reactions and significantly alter the composition of pyrolysis products, including the chemical composition of the resulting bio-oil. With the growing interest in adopting bio-oils as a renewable energy source, understanding the chemical composition of bio-oils and the reaction pathways t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/00C10L1/02C10B53/02C10B57/08
CPCB01J19/0006C10B53/02C10B57/08C10L1/02C10L2200/0476C10L2290/54Y02E50/10
Inventor 姚双全覃程荣戈佳艳吴玉婷韩雨珊刘肇蒙王双飞梁辰聂双喜
Owner GUANGXI UNIV
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