US-20260125319-A1 - NEGATIVE CARBON GEOPOLYMER SLURRY, NEGATIVE CARBON GEOPOLYMER AND PREPARATION METHODS THEREOF

US20260125319A1US 20260125319 A1US20260125319 A1US 20260125319A1US-20260125319-A1

Abstract

The present application discloses a negative carbon geopolymer slurry, a negative carbon geopolymer and preparation methods thereof. After introducing a carbon dioxide gas into a hydroxide solution, the geopolymer slurry is prepared (sequentially mixed with a sodium silicate solution, fly ash and furnace stone powder are mixed) to form a negative carbon geopolymer slurry with carbon storage function. Moreover, the negative carbon geopolymer slurry formed by this preparation method not only has low preparation cost, but also the negative carbon geopolymer subsequently prepared has certain economic value.

Inventors

Pei-Tung Shih
Yu-Chia Wei
Hao-De Lo
Jia-Syun Li
Ta-Wui Cheng
Wei-Hao Lee
CHIA-HO WU
De-Wei Gao
Wen-Chieh Wu
Kuang-sheng Hong

Assignees

METAL INDUSTRIES RESEARCH & DEVELOPMENT CENTRE

Dates

Publication Date: 20260507
Application Date: 20241211
Priority Date: 20241101

Claims (10)

1 . A preparation method for negative carbon geopolymer slurry, comprising the steps of: introducing a carbon dioxide gas into a hydroxide solution and stirring the hydroxide solution with the carbon dioxide gas at a room temperature and an atmospheric pressure to form a mixed solution; adding a sodium silicate solution to the mixed solution and stirring at the room temperature and the atmospheric pressure to form a negative carbon alkaline solution; and adding a powder material to the negative carbon alkaline solution and mixing to form a negative carbon geopolymer slurry.
2 . The preparation method of the negative carbon geopolymer slurry as claimed in claim 1 , wherein in the step of introducing a carbon dioxide gas into a hydroxide solution, the hydroxide solution is either a sodium hydroxide solution or a potassium hydroxide solution.
3 . The preparation method of the negative carbon geopolymer slurry as claimed in claim 1 , wherein a molar concentration of the hydroxide solution ranges from 3M to 6M.
4 . The preparation method of the negative carbon geopolymer slurry as claimed in claim 1 , wherein in the step of stirring the hydroxide solution with the carbon dioxide gas at a room temperature and an atmospheric pressure to form a mixed solution, the stirring time is between 30 seconds and 2 minutes.
5 . The preparation method of the negative carbon geopolymer slurry as claimed in claim 1 , wherein in the step of adding a sodium silicate solution to the mixed solution and stirring at a room temperature and an atmospheric pressure, the content of sodium silicate powder in the 100 wt % sodium silicate solution ranges from 10 wt % to 50 wt %.
6 . The preparation method of the negative carbon geopolymer slurry as claimed in claim 1 , wherein in the step of adding a sodium silicate solution to the mixed solution and stirring at a room temperature and an atmospheric pressure, the stirring time is between 30 seconds and 2 minutes.
7 . The preparation method of the negative carbon geopolymer slurry as claimed in claim 1 , wherein in the step of adding a powder material to the negative carbon alkaline solution and mixing, the powder material includes fly ash and slag powder, and the weight ratio of the fly ash to the slag powder is between 1:1 and 7:3.
8 . A negative carbon geopolymer slurry, which is prepared by the preparation method as claimed in claim 1 .
9 . A preparation method of a negative carbon geopolymer, comprising the steps of: providing a negative carbon geopolymer slurry as described in claim 8 ; and pouring the negative carbon geopolymer slurry into a mold and proceeding a curing sequestration process at a room temperature, for forming a negative carbon geopolymer.
10 . A negative carbon geopolymer, which is prepared by a preparation method of claim 9 .

Description

FIELD OF THE INVENTION The present application relates to a type of slurry and polymer and preparation methods thereof, specifically a negative carbon geopolymer slurry and negative carbon geopolymer that can sequester carbon dioxide and possess certain economic value. BACKGROUND OF THE INVENTION Greenhouse gas emissions from human activities have intensified the greenhouse effect, leading to climate change. The carbon dioxide (CO2) produced from burning fossil fuels such as coal, oil, and natural gas is one of the most significant contributors to climate change. Hydrocarbons such as crude oil, coal, and natural gas extracted from the earth are processed into various oils, fuels, plastic rubber products, and organic chemicals. These hydrocarbon products, after combustion, produce power and heat, or become waste that is incinerated, ultimately releasing CO2 into the atmosphere and increasing the environmental burden. Currently, the International Energy Agency (IEA) (2020) has released an energy technology outlook report stating that renewable energy generation, bioenergy, hydrogen energy, and Carbon Capture, Utilization, and Storage (CCUS) are key technologies for achieving global net-zero emissions. Among these, CCUS is the only technology that can directly reduce or eliminate CO2 emissions, balancing unavoidable emissions and playing a crucial role in achieving net-zero targets. CCUS refers to the technology of collecting carbon dioxide produced from fuel combustion or industrial processes, transported by ships or pipelines, and permanently stored in deep geological structures underground, or used to create valuable products. Among them, carbon capture and storage (CCS) refers to a process-separating relatively pure carbon dioxide (CO2) produced by industry (such as from burning fossil fuels or biomass), processing it, and then transporting it to certain locations for long-term storage. Typically, such carbon dioxide is captured from large point sources (such as chemical plants or biomass plants), processed, and then stored in deep geological structures. The purpose of this is to reduce greenhouse gas emissions into the atmosphere, thereby mitigating climate change. Carbon Capture and Utilization (CCU) is the process of capturing carbon dioxide for further use. Carbon capture and utilization can address global challenges, namely significantly reducing greenhouse gas emissions from major fixed industrial emitters. CCU differs from carbon capture and storage (CCS) because CCU does not lead to the permanent geological storage of carbon dioxide. Instead, the purpose of CCU is to convert captured carbon dioxide into more valuable substances or products. However, current carbon storage technologies are high-cost storage technologies. Although carbon dioxide is stored, it is still unknown whether existing carbon storage technologies can continue given the costs involved. Therefore, finding effective, low-cost, and highly utilizable carbon storage methods to store carbon dioxide is a problem that technicians in this field want to solve. SUMMARY OF THE INVENTION A main objective of the present application is to provide a negative carbon geopolymer slurry, negative carbon geopolymer, and preparation methods thereof, by encapsulating carbon dioxide into a hydroxide solution, then preparing the geopolymer slurry (mixed sequentially with sodium silicate solution, fly ash, and slag powder), forming a negative carbon geopolymer slurry with carbon storage function. To achieve above objective, the present application provides a preparation method for negative carbon geopolymer slurry, firstly introducing carbon dioxide gas into a hydroxide solution (which is a sodium hydroxide solution or a potassium hydroxide solution, molar concentration is from 3M to 6M) and stirring the hydroxide solution with the carbon dioxide gas (wherein the time of stirring is from 30 seconds to 2 minutes) at a room temperature and an atmospheric pressure to form a mixed solution, then adding a sodium silicate solution to the mixed solution and stir at the room temperature and the atmospheric pressure to form a negative carbon alkaline solution; and adding a powder material to the negative carbon alkaline solution and mix to form a negative carbon geopolymer slurry. The present application further provides an embodiment, wherein in the step of introducing carbon dioxide gas into a hydroxide solution, a ventilation volume of the carbon dioxide gas is from 3 L/minute to 5 L/minute of the carbon dioxide gas, and a ventilation time of the carbon dioxide gas is from 1 minute to 5 minutes. The present application further provides an embodiment, wherein in the step of adding a sodium silicate solution to the mixed solution and stirring at a room temperature and an atmospheric pressure, the content of sodium silicate powder in the 100 wt % sodium silicate solution ranges from 10 wt % to 50 wt %. The present application further provides an embodiment, wher