Utilization of lignite derivatives to construct Zr-based …
Utilization of lignite derivatives to construct Zr-based catalysts for the conversion of biomass-derived ethyl levulinate. Author links open overlay panel Binbin ... (LA) and alkyl levulinates (AL) were discussed and compared, and one-pot processes with cascade steps of cellulosic and hemicellulosic derivatives such as furfural (Fur), furfuryl ...
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A high performance direct carbon solid oxide fuel cell – A …
On the other side, many studies (Li et al. [26], Dudek et al. [27], Jiao et al. [28], etc.) have indicated that amounts of impurities such as Al 2 O 3 or SiO 2 involved in raw coal will have a negative effect on the anode reaction by blocking the surface active sites and pore structures of the anode and suppressing the reverse Boudouard ...
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Thermodynamic study on a novel lignite poly-generation system …
The efficient and clean use of lignite is strategically important to sustainable development. Predrying technology is a competitive approach to solve the utilization issue of the high moisture, and the pyrolysis technology is an ideal upgrading method to realize high value-added components extraction. However, the two technologies are normally …
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Comparison of the processing conditions and the properties …
The present utilization of fly ashes on a worldwide basis varies widely from a minimum of 3% to a maximum of 57% of the total produced, with an average of 16% (Shuming et al., 2014). Large amounts of this waste are used by the cement industry and by the plants manufacturing construction materials (Safiuddin et al. (2010)).
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Facile use of lignite as robust organic ligands to construct Zr …
Due to the main component of lignite is the carbon element, lignite can be converted into stable carbon-based materials via treatment under high temperatures. Therefore, preparing carbon supported metal catalysts using lignite as raw materials through high temperature treatment is another approach for lignite utilization [41], [42], …
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Chemical looping gasification of lignite to syngas using …
The gasifier types of lignite's gasification can be divided into fixed bed, fluidized bed and entrained bed gasifiers (Fig. 3) (Dai et al., 2023).Fixed beds (lump coal) are technically mature and include atmospheric fixed beds (UGI), pressurized fixed beds (Lurgi furnace, Lurgi), and modified versions of fixed beds (BGL) (Vijayaragavan and …
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Use of Alabama lignite in the production of lightweight …
Lignite could be delivered to the plant at a cost of $12.25/ton of lignite and would require an incremental investment of $128,500 in mining equipment. Equipment for drying the …
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Study on the thermal liquefaction of Xilinguole lignite in …
Recently, the clean and high-efficient utilization of lignite is attracting increasing attentions all over the world [3,4]. Thermal conversions such as liquefaction [5,6], ... Patrakov et al. [20] found that there are two substantially different stages in the liquefaction process with a boundary at a value of coal conversion 10–15%, which ...
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Innovative design of coal utilization – A green pathway for …
Zecevic et al. [20] has argued that coal fuel cells operating at high temperature are non-practical and it is necessary to develop a practical coal fuel cell at low temperature with a good performance. A half-cell of low temperature coal fuel cell using a secondary redox couple (Fe 3+ /Fe 2+) to oxidize coal was reported by Douglas et al. [5 ...
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Flotation and Humic Acid Extraction Test of Zhaotong Lignite
LI J T, LIU X R, YANG J, et al. Screening of fungi and condition optimization for biodegradation of photooxidized lignite [J]. Multipurpose Utilization of Mineral Resources, 2020(5): 82-86+157. ... CUI J H, XU H X, et al. Lignite reverse flotation test process and mechanism [J]. Journal of Mining Science and Technology, 2021, 6(2): 207 ...
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Clean utilization of lignite to produce biomethane by …
This study provides new insight into methanation and the clean utilization of lignite. Graphical abstract. Download: Download high-res ... and are obtained through enrichment and domestication [18,19]. Michael et al. used coal mine well water as the bacterial source and coal as the substrate for fermentation to enrich methanogenic …
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Life cycle assessment of lignite pyrolysis: a case study in China
This material is commonly used as a main fossil fuel for electricity generation in Europe (Bruninx et al., 2013). Although lignite accounts for almost half of the coal recoverable reserves worldwide, its application is limited because of its low calorific value, rich moisture content, active chemical reactivity, and flammability, among others ...
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Catalytic upgrading of lignite pyrolysis volatiles to light …
Catalytic upgrading of lignite pyrolysis volatiles to light aromatics under methanol atmosphere over Zr and/or Fe modified hollow ZSM-5 zeolites ... Unique hollow structures are beneficial in many ways, such as providing better material utilization, shortening diffusional barriers ... [18]. Ding et al found that hollow mesoporous zeolite …
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Co-Gasification Performance of Low-Quality …
Ahlada lignite (AL) was of low quality, with a calorific value of 8.9 MJ/kg. The biomass materials, ginning cotton waste (GCW) and pine needles (PN) had calorific values 16.6 MJ/kg and 20.1 MJ/kg, …
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Metabolism mechanisms of biogenic methane production by …
CBM represents a high-quality and clean energy source, making its exploitation and utilization crucial for achieving carbon neutrality. CBM can be derived through either thermal or biogenic processes, with biogenic CBM accounting for over 20 % of the total CBM globally (Rathi et al., 2019).
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Properties and microstructure of lightweight aggregate produced …
The effect of glass addition on the processing, physical properties and microstructure of lightweight aggregate made from lignite coal fly ash from the Megalopolis power station in Greece has been investigated. Fly ash/glass mixes have been rapidly sintered at temperatures between 1040 and 1120 °C in a rotary furnace, and the …
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Water occurrence in lignite and its interaction with coal …
Consequently, it is of great importance to upgrade the quality of lignite through dehydration before utilization. The key to dehydration technology lies in the understanding to the water occurrence and energy state in lignite and its physical-chemical interactions with coal structure. ... Y. Fei et al. Lignite-water interactions studied by ...
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Modified lignite and black coal reduce ammonia …
Our group has first demonstrated that the application of lignite (i.e. brown coal) effectively reduces NH 3 emissions from cattle feedlots by 66% (Chen et al., 2015). The use of lignite can be a new cost-effective NH 3 abatement option as it not only achieves great benefits to the climate, human and ecosystem health (Bai et al., 2020; …
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Utilization of lignite power generation residues for the …
1.. IntroductionNowadays, a large part of Greece's energy demand is covered by lignite combustion in West Macedonia and Peloponnesus. This energy is produced exclusively in plants of Public Power Corporation (PPC) and results in the production of over 14 Mt/year solid byproducts.Flying ash (FA) holds the 75% of the total …
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Valorizing lignite waste into engineered nitro-humic …
However, the efficient utilization of nitrogen fertilizer remains a concern, with only around 23 million tonnes out of 110 million tonnes produced annually used effectively for agriculture. ... and a high surface area (Sarlaki et al., 2020, 2021b). Additionally, lignite boasts a rich concentration of humic substances and oxygen-containing ...
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A review of Alabama lignite deposits | U.S. Geological Survey …
The Gravel Creek lignite occurs in central and eastern Alabama, and the Oak Hill and Tuscahoma Sand lignites occur in southwest Alabama. Eighty-five percent of this lignite may be recoverable by surface mining methods (Tolson, 1985). The total amount of lignite reported as a reserve by the state is over 4.7 billion short tons (Self et al., 1978).
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Advances in mild degradation and directional upgrading of …
Directional conversion and utilization of lignite derivatives. ... >C al-O-C ar <, and >C al-O-C al < are common in lignite, where C ar and C al refer to aromatic carbon and aliphatic carbon, respectively [16], [182], which has a certain similarity with the macromolecular structure of lignin. In addition, the obtained derived bio-oils and coal ...
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Feasibility analysis of clean utilization of kitchen waste oil …
As an efficient biomass energy production technology, anaerobic fermentation plays a key role in organic waste treatment. Therefore, converting lignite into biomethane using microbial synergy with complex functions has become a research hotspot (Nguyen and Lee, 2021; Yoon et al., 2016).
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Potential fly-ash utilization in agriculture: A global review
Lignite or brown coal is used almost exclusively as fuel for steam-electric power generation, resulting in the production of huge amount of fly-ash. Therefore, use of brown fly-ash in agriculture deserves special attention. Al in fly-ash is mostly bound in insoluble aluminosilicate structures, which greatly confines its biological toxicity [21].
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Zeolite development from fly ash and utilization in lignite mine-water
Hollman et al. (1999) prompted the synthesis of zeolites from SiO 2 extracts from FAs obtaining high purity zeolites (> 95% of A and X zeolite), and Moreno et al. (2002) optimised this method synthesizing in the same process zeolites with high purity from SiO 2 extracts and another zeolitic product (the solid residue from SiO 2 extracts ...
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Sustainable utilization of Fe3O4-modified activated lignite …
Samaraweera et al. demonstrated that lignite has C (43.0%), O (40.8%), Al (5.3%), and Si (8.7%) surface atomic concentrations ... By shedding light on the promising prospects of …
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Mechanistic insight into the adsorption and interaction of lignite …
Mechanistic insight into the adsorption and interaction of lignite, organic ingredients, and dispersant in coal wastewater slurry. Author links open overlay panel Suqian Gu a 1, ... Z. Zhao et al. Energy utilization of coal-coking wastes via coal slurry preparation: The characteristics of slurrying, combustion, and pollutant emission. Energy …
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Effect of oxygen vacancy of lignite-char-supported Co …
Our previous research delineated a method to augment the performance of lignite (Tang et al., 2021, Yang et al., 2023b). Firstly, lignite was treated with HCl to eliminate organic impurities, followed by oxidation with H 2 O 2 to introduce more oxygen-containing functional groups. This procedure not only increases its calorific value but …
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Lignite ash: Waste material or potential resource
Investigations on lignite ash utilization based on a stabilized ash from Germany • Combination of ash pre-treatment, leaching and utilization approaches • …
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