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Discussion on Wastewater Treatment Process of .

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Coal chemical wastewater has such characteristics as high concentration of oil, ammonia nitrogen and COD. In this paper, treatment process of coal chemical industry is described mainly, such as pretreatment process, biochemical treatment process and polishing process. Through the recovery of phenol and ammonia and the treatment of wastewater from abroad, the new technology of wastewater ...

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Process simulation of coal-direct chemical looping ...

The coal gasification process is used in the commercial production of syngas as a means toward the clean use of coal. In this paper, the process of syngas production via the coal-direct chemical looping gasification process (CDCLG) is modeled under thermochemical equilibrium with the Gibbs free energy approach, and the model is developed using ...

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Process and Reactor Level Simulations of Coal .

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Abstract. Reducing carbon emissions from fossil-fueled power plants has been an active area of research in recent years. One technology that appears to be very promising for high-efficiency low-cost carbon capture is chemical-looping combustion (CLC) (Leion et al. 2009a).CLC involves combustion of fuels (either gas or solid) by heterogeneous chemical reactions with an oxygen carrier, usually a ...

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11.10 Coal Cleaning

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11.10 Coal Cleaning 11.10.1 Process Description1-2,9 Coal cleaning is a process by which impurities such as sulfur, ash, and rock are removed from coal to upgrade its value. Coal cleaning processes are categorized as either physical cleaning or chemical cleaning. Physical coal cleaning processes, the mechanical separation of coal from its

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Coal-Direct Chemical Looping Gasification for .

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A novel process scheme for hydrogen production from coal with in situ CO2 capture, known as the coal-direct chemical looping (CDCL) gasification process, is discussed in this article. The CDCL process utilizes an iron oxide based oxygen carrier as a chemical looping medium to indirectly gasify coal into separate streams of H2 and CO2. ASPEN Plus reactor simulation models based on both ...

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Processes | Free Full-Text | Analysis of Influencing ...

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In the production process of coal chemical enterprises, there are factors such as dust, poisons, as well as toxic and harmful gases, which seriously restrict the safety and health of employees. It is urgent to strengthen research on occupational safety and health (OSH) of coal chemical enterprises. Research on the influencing factors is very important to improve the level of OSH in coal ...

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(PDF) Mechanism of coal chemical leaching process and ...

of a Coal Chemical-Leaching Process and Recovery of Spent Chemicals: A Pilot-Scale Study, International Journal of Coal Preparation and Utilization, 37:6, 293-302, DOI: 10.1080/19392699.2016.1179637

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Progress in coal chemical technologies of China in ...

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15/05/2019 · The coal chemical industry in China has witnessed several notable achievements in chemical engineering progress, namely CTL (indirect and direct) and MTO. Comprehensive reviews on topics such as catalysis, kinetics, and reactor design and process integration will be provided by leading scientists in related fields with firsthand information to showcase the contributions of Chinese .

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Coal Chemicals Europe - Process

Coal is converted to coke in the first stage of steel production. This is done by heating coal in a coke oven at approximately 1100 °C for about 20 hours. The volatile elements that escape during this process are recovered to serve as energy sources or chemical raw materials for further use.

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Iron-based syngas chemical looping process and .

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01/01/2014 · Gray D, Klara J, Tomlinson G, White C. Chemical-looping process in a coal-to-liquids configuration: independent assessment of the potential of chemical-looping in the context of a Fischer–Tropsch plant. In: Report No.: DOE/NETL-2008/1307. Contract No.: NBCH-C-020039. Sponsored by the US Department of Energy. Pittsburgh, (PA): National Energy Technology .

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Discussion on Wastewater Treatment Process of .

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Coal chemical wastewater has such characteristics as high concentration of oil, ammonia nitrogen and COD. In this paper, treatment process of coal chemical industry is described mainly, such as pretreatment process, biochemical treatment process and polishing process. Through the recovery of phenol and ammonia and the treatment of wastewater from abroad, the new technology of wastewater ...

Get Price

Coal & Chemical Industry - Shaangu Site

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Process Gas Compressor Train . Shaangu provides all kinds of process gas compressor units for process industries including coal to syngas, refrigeration unit, low-temperature methanol washing, ammonia synthesis, methanol synthesis, coke oven gas to methanol, coal tar hydrogenation, comprehensive utilization of coke oven gas, heavy oil hydrocracking, glycol, coal to oil and so on.

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Coal-Direct Chemical Looping Gasification for .

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A novel process scheme for hydrogen production from coal with in situ CO2 capture, known as the coal-direct chemical looping (CDCL) gasification process, is discussed in this article. The CDCL process utilizes an iron oxide based oxygen carrier as a chemical looping medium to indirectly gasify coal into separate streams of H2 and CO2. ASPEN Plus reactor simulation models based on both ...

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Processes | Free Full-Text | Quantum Chemical .

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Il y a 2 jours · The adsorption of dodecyl trimethyl ammonium bromide (DTAB) on coal can affect the wettability of coal and change the water absorption of coal. After DTAB treatment, the change in the CH4 adsorption capacity of coal is worth further study. To reveal the microscopic mechanism of the influence of DTAB on the CH4 adsorption capacity of coal, we employed the density functional theory (DFT) .

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Chemical Looping Combustion of Coal in China ...

Chemical looping combustion (CLC) has emerged as an efficient and promising combustion technique for fossil fuels during the past few decades. The main advantages of CLC lie in its inherent CO2 sequestration and cascade energy utilization, being primarily benefited from the in situ reactive separation facilitated by the circulation of a solid intermediate. Up to date, the research on the CLC ...

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Coal - Wikipedia

Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams.Coal is mostly carbon with variable amounts of other elements; chiefly hydrogen, sulfur, oxygen, and nitrogen. Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years.

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Mechanism of a Coal Chemical-Leaching Process .

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ABSTRACTMethods for enriching organic macerals in coal are of great importance, but, due to the yield constraint, physical-beneficiation methods are less effective. Chemical beneficiation using alkali followed by acid has been studied at the pilot stage with a batch of 500 kg of feed coal for three different coal fractions of the physical-beneficiation process using dense media cyclone and ...

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Chemical Process - an overview | ScienceDirect Topics

Chemical Process. Chemical processes are integrated with physical processes and are particularly affected by quality related stressors that affect carbon and nutrient cycling and introduce metals, persistent organic contaminants, salts, and toxicants in the water (Wepener and Chapman, 2012).

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Is burning coal a chemical change? Why or why not? - Quora

9/11/2017 · Burning coal is a chemical change called combustion. A combustion is the chemical reaction (redox reaction) of coal with oxygen O2. It is exothermic, which means it releases energy : hence the heat. Burning coal is in fact not one type of combusti...

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China invents and reinvents coal to chemicals | ICIS

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16-4-2012 · And finally, the coal-to-chemicals process is showing huge growth in China. China has the world's third-largest proven coal reserves, holding 13% of .

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Chemical processing

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To address challenges faced by chemical handling manufacturers, we engineer customised technological solutions, while also ensuring quality standards are met and process efficiencies are provided. Be it pneumatic transfer systems, gravimetric feeding, high-precision weighfeeding or dust filtration – we have the right solution for your requirements.

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