in-situ coal gasification process

A new approach of reduction of carbon dioxide emission and optimal use ...

A new approach of reduction of carbon dioxide emission and optimal use ...

article{osti_, title = {A new approach of reduction of carbon dioxide emission and optimal use of carbon and hydrogen content for the desired syngas production from coal}, author = {Lu, Wenyang and Cao, Qingxi and Xu, Bang and Adidharma, Hertanto and Gasem, Khaled and Argyle, Morris and Zhang, Fan and Zhang, Yulong and Fan, Maohong}, abstractNote = {We report this research is designed ...

Underground coal gasification Wikipedia

Underground coal gasification Wikipedia

UCG is an insitu gasification process, carried out in nonmined coal seams using injection of oxidants and steam. The product gas is brought to the surface through production wells drilled from the surface. [1] The predominant product gases are methane, hydrogen, carbon monoxide and carbon dioxide.

In Situ Gasification — Productions — Student Energy

In Situ Gasification — Productions — Student Energy

Insitu coal gasification is the chemical conversion of deeplyburied coal into gases including methane, hydrogen, carbon monoxide and carbon dioxide On the map Everything is connected. Browse terms related to In Situ Gasification to learn more about how it fits into the energy system. Coal What is In Situ Gasification?

Underground Coal Gasification |

Underground Coal Gasification |

The coal face is ignited, and the high temperatures (about 1,200°C) from the combustion and limited oxygen causes nearby coal to partially oxidize into hydrogen, carbon monoxide (CO), carbon dioxide (CO 2 ), and minimal amounts of methane (CH 4) and hydrogen sulfide (H 2 S).

Catalytic coal gasification for methane production: A review

Catalytic coal gasification for methane production: A review

Catalytic coal gasification for methane production is a promising technology in the clean coal utilization field. In this review, the technologies for coalderived natural gas production, the catalytic coal gasification processes and the used reactors were compared.

Pilot Plant Tests Process Control for Producing Synthetic Gas from Coal ...

Pilot Plant Tests Process Control for Producing Synthetic Gas from Coal ...

The challenge for Leigh Creek Energy Limited was to design, build and commission a pilot plant to transform coal from its solid state into a gaseous form and monitor the technical and environmental performance of the process. The insitu gasification process (ISG) produces methane, hydrogen and other valuable components. The synthetic gas ...

Krzysztof KAPUSTA | Head of Laboratory of Experimental ... ResearchGate

Krzysztof KAPUSTA | Head of Laboratory of Experimental ... ResearchGate

A 72hour ex situ hard coal gasification test in one large block of coal was carried out. The gasifying agent was oxygen with a constant flow rate of Nm ³ /h.

Resources and economic analyses of underground coal gasification in ...

Resources and economic analyses of underground coal gasification in ...

The Underground Coal Gasification (UCG) offers a clean source of energy by converting coal/lignite insitu into syngas that can be used either as a fuel or as a chemical feedstock [2]. The UCG has the potential to utilize coal and lignite resources which are inaccessible due to depth and are uneconomical to extract using the conventional mining ...

Investigation of Underground Coal Gasification in Laboratory ... MDPI

Investigation of Underground Coal Gasification in Laboratory ... MDPI

The underground coal gasification (UCG) technology converts coal into product gas and provides the option of environmentally and economically attractive coal mining. Obtained syngas can be used for heating, electricity, or chemical production. Numerous laboratory coal gasification trials have been performed in the academic and industrial fields. Labscale tests can provide insight into the ...

Underground Coal Gasification: A Brief Review of Current Status

Underground Coal Gasification: A Brief Review of Current Status

Coal gasification is a promising option for the future use of coal. Similarly to gasification in industrial reactors, underground coal gasification (UCG) produces syngas, which can be used for power generation or for the production of liquid hydrocarbon fuels and other valuable chemical products.

Insitu analysis of the sintering behavior of coal ash and a phosphorus ...

Insitu analysis of the sintering behavior of coal ash and a phosphorus ...

Besides, the CO 2 capture and separation are also easier during gasification process compared with that of the combustion process [3, 4]. However, the development of biomass gasification technology is inhibited by its seasonal nature, low energy density, high tar yield et al. [5, 6]. The concept of the cogasification of biomass and coal is ...

PDF In Situ Coal Gasification: an Emerging Technology1

PDF In Situ Coal Gasification: an Emerging Technology1

An oxidant (usually air, oxygen, or steam) is injected into the coal seam and reacts with the coal and water present in the seam to produce syngas that is extracted through a production well. As the gasification process proceeds, the cavity grows radially outward and upward from the injection well.

Experimental Investigation on the Pore Structure Evolution of Coal in ...

Experimental Investigation on the Pore Structure Evolution of Coal in ...

1. Introduction. Coal is the most sufficient fossil fuel and accounts for about 27% of energy consumption all over the world in 2020. 1 However, considering the increasingly urgent demand for environmental protection, the conventional method of coal mining and utilization should be replaced. Another alternative process is underground coal gasification (UCG), which is more environmentally ...

Special Issue

Special Issue "Modeling and Control of Energy Conversion during ... MDPI

This study provides an overview of the systematic methods of the in situ coal gasification process. Furthermore, the model of the porous structure of coal has been presented and the gas movement taking place in the carbon matrix—which is part of the bed—has been described. The experimental tests were carried out with the use of air forced ...

Recent developments and current position of underground coal gasification

Recent developments and current position of underground coal gasification

Abstract. Underground coal gasification is a conversion and extraction process, for the production of useful synthetic product gas from an insitu coal seam, to use in power generation, heat production or as a chemical feedstock. While many variants of the underground coal gasification process have been considered and over 75 trials performed ...

Monitoring the gasification area and its behavior in underground coal ...

Monitoring the gasification area and its behavior in underground coal ...

Underground Coal Gasification (UCG) is a technique to recover coal energy from underground by insitu gasification. UCG contributes to improving the energy recovery ratio from coal...

Coal Gasification an overview | ScienceDirect Topics

Coal Gasification an overview | ScienceDirect Topics

Its main focus was the theoretical and experimental development of in situ production of hydrogenrich gas from coal using underground gasification. A followup project HUGE2 (201114), which was also financed by RFCS, focused on the environmental and safety aspects associated to the UCG process, including underground water contamination and ...

Underground coal gasification: From fundamentals to applications

Underground coal gasification: From fundamentals to applications

The coal is ignited and air is injected underground to sustain a fire, which is essentially used to "mine" the coal and produce a combustible synthetic gas which can be used for industrial heating, power generation or the manufacture of hydrogen, synthetic natural gas or diesel fuel.

Coal Gasification an overview | ScienceDirect Topics

Coal Gasification an overview | ScienceDirect Topics

Coal gasification can also be carried out on seams that are still in place, the coal being converted to gaseous fuels without an intermediate mining operation. This process, known as in situ or underground gasification, typically involves drilling boreholes to intersect the seam in at least two places, and providing a passage for gas through the seam from one intersection to the other.

Catalytic Gasification of Coals and Biochars: A Brief Overview

Catalytic Gasification of Coals and Biochars: A Brief Overview

They can be employed insitu during the gasification reactions or exsitu after gasification reactions for tar removal and syngas quality improvement . In situ gas cleaning ... The effect of dolomite addition on sulphur, chlorine and hydrocarbons distribution in a fluidbed mild gasification of coal. Fuel Process. Technol. 7778 (2002).

Cavity Models for Underground Coal Gasification | SpringerLink

Cavity Models for Underground Coal Gasification | SpringerLink

Abstract. Underground coal gasification is an in situ coal utilization technique that has immense potential as a future clean coal technology. UCG possesses a number of advantages including the ability to use deep and unmineable coals. The most important component of UCG is the underground "cavity"—which serves as a chemical reactor with ...

CO2 char gasification: A systematic review from 2014 to 2020

CO2 char gasification: A systematic review from 2014 to 2020

During the gasification process, the char structure order decreased first and then increased, attributed to the evaporation of K at high temperature. ... Wang et al. [105] reported that in situ coal char had the highest gasification reactivity and the lowest activation energy, whereas the exsitu coal char showed the lowest gasification ...

Experimental study on evaluation of underground coal gasification with ...

Experimental study on evaluation of underground coal gasification with ...

Underground coal gasification (UCG) is an insitu gasification technology where the controlled retreating injection point (CRIP) method is usually adopted to optimize the cavity evolution and gas production stability. However, the reported studies only focus on the gasification behavior of the moving injection backward under fixed time intervals.

Recent developments and current position of underground coal gasification

Recent developments and current position of underground coal gasification

Underground coal gasification is a conversion and extraction process, for the production of useful synthetic product gas from an insitu coal seam, to use in power generation, heat production or as a chemical feedstock.

An exsitu underground coal gasification experiment with a siderite ...

An exsitu underground coal gasification experiment with a siderite ...

A 72h ex situ hard coal gasification test in one large block of coal was carried out. The gasifying agent was oxygen with a constant flow rate of m3/h. The surroundings of coal were simulated with wet sand with 11% moisture content. A 2cm interlayer of siderite was placed in the horizontal cut of the coal block. As a result of this process, gas with an average flow rate of m3/h was ...

PDF In Situ Coal Gasification: an Emerging Technology1

PDF In Situ Coal Gasification: an Emerging Technology1

Coal extraction by the UCG process, also known as insitu coal gasification, appears to be both technically and economically feasible and exhibits many potential advantages over the conventional mining methods (Kapusta and Stanczyk, 2011; Shuqin et al., 2007). The UCG

Coal gasification | Synthesis, Conversion, Reactions | Britannica

Coal gasification | Synthesis, Conversion, Reactions | Britannica

gasifier. (Show more) coal gasification, any process of converting coal into gas for use in illuminating and heating. The first illuminating gas was manufactured from coal in England in the late 18th century by the process of carbonization or destructive distillation, heating coal in the absence of air, leaving a residue of coke as a byproduct.

Life cycle energy consumption and GHG emissions of ... ScienceDirect

Life cycle energy consumption and GHG emissions of ... ScienceDirect

In order to clarify the competitiveness of deep insitu gasification based coaltohydrogen (deep IGCtH) in the context of carbonconstrained development, based on simulation results, the energy, water consumption and carbon emissions were quantitatively assessed and compared with largescale fossil energy based routes, using life cycle assessment model from feedstock to hydrogen that covers ...

Monitoring and Control in Underground Coal Gasification: Current ... MDPI

Monitoring and Control in Underground Coal Gasification: Current ... MDPI

By igniting in the coal seam and injecting gas agent, underground coal gasification (UCG) causes coal to undergo thermochemical reactions in situ and, thus, to be gasified into syngas for power generation, hydrogen production, and storage. Compared with traditional mining technology, UCG has the potential sustainable advantages in energy, environment, and the economy. The paper reviewed the ...

A comprehensive review of primary strategies for tar ... ScienceDirect

A comprehensive review of primary strategies for tar ... ScienceDirect

As mentioned above, different combinations or concentrations of gasification agents are applied in biomass gasification technologies. The use of one or another gasification agent leads to a different composition of product gas, so the choice among them is made based on a balance between the final product gas specification (for downstream application) and process costs [14].

Coal Gasification an overview | ScienceDirect Topics

Coal Gasification an overview | ScienceDirect Topics

This chapter deals with coal gasification, which is a process that converts carbonaceous materials, such as coal, petroleum, petroleum coke, or biomass, into carbon monoxide and hydrogen.

Numerical modelling of gas outburst from coal: a review from ... Springer

Numerical modelling of gas outburst from coal: a review from ... Springer

Gas properties Gas content. One of the factors affecting the energy release potential of coal is gas content. Gas content is the summation of free and adsorbed gas in coal and is recognized as the key parameter used for determining outburst propensity (Lama 1995).In Australia, gas content is used alone to define a Threshold Limit Value (TLV) in coal mines to assess outburst risks.