scholarly journals Synthesis of CHA Zeolite using Low Cost Coal Fly Ash

2015 ◽  
Vol 121 ◽  
pp. 961-966 ◽  
Author(s):  
Xiaotong Jin ◽  
Na Ji ◽  
Chunfeng Song ◽  
Degang Ma ◽  
Guoping Yan ◽  
...  
Keyword(s):  
Fly Ash ◽  
Low Cost ◽  
Coal Fly Ash

A Noble and Economical Method for the Synthesis of Low Cost Zeolites From Coal Fly Ash Waste

2021 ◽  
pp. 1-19
Author(s):  
Virendra Kumar Yadav ◽  
R Suriyaprabha ◽  
Gajendra Kumar Inwati ◽  
Nitin Gupta ◽  
Bijendra Singh ◽  
...  
Keyword(s):  
Fly Ash ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Economical Method

scholarly journals Modified coal fly ash as low cost adsorbent for removal reactive dyes from batik industry

2018 ◽  
Vol 154 ◽  
pp. 01037 ◽  
Author(s):  
Agus Taufiq ◽  
Pratikno Hidayat ◽  
Arif Hidayat
Keyword(s):  
Fly Ash ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Reactive Dyes ◽  
Bet Surface Area ◽  
Batch Adsorption ◽  
Operational Parameters ◽  
Solution Ph ◽  
Percentage Removal ◽  
Modified Fly Ash

The removal of reactive dyes on modified coal fly ash has been investigated during a series of batch adsorption experiments. Physical characteristics of modified coal fly ash was characterized by Brunauer Emmett Teller (BET) surface area analysis, X-ray powder diffraction (XRD), Fourier transform infrared spectrophotometer (FT-IR), and scanning electron microscope (SEM). The effects of operational parameters such as initial dye concentration (50–200 mg/L), solution pH (4–10) and adsorbent dosage (50–200 mg/L) were studied. The adsorption experiments indicated that modified coal fly ash was effective in removing of Remazol Blue. The percentage removal of dyes increased while the modified fly ash dosage increased. The percentage removal of dyes increased with decreased initial concentration of the dye and also increased with amount of adsorbent used. The optimum of removal of dyes was found to be 94% at initial dye concentration 50 g/mL, modified fly ash dosage 250 g/mL, and pH of 2.0.

A low-cost adsorbent from coal fly ash for mercury removal from industrial wastewater

2017 ◽  
Vol 5 (1) ◽  
pp. 391-399 ◽  
Author(s):  
Mahshid Attari ◽  
Syed Salman Bukhari ◽  
Hossein Kazemian ◽  
Sohrab Rohani
Keyword(s):  
Fly Ash ◽  
Industrial Wastewater ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Mercury Removal

scholarly journals Studies on the CO2 Capture by Coal Fly Ash Zeolites: Process Design and Simulation

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8279
Author(s):  
Silviya Boycheva ◽  
Ivan Marinov ◽  
Denitza Zgureva-Filipova
Keyword(s):  
Fly Ash ◽  
Co2 Capture ◽  
Carbon Capture ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Cost Effective ◽  
Thermal Recovery ◽  
Raw Material ◽  
Dynamic Adsorption ◽  
Co2 Capture Capacity

At present, mitigating carbon emissions from energy production and industrial processes is more relevant than ever to limit climate change. The widespread implementation of carbon capture technologies requires the development of cost-effective and selective adsorbents with high CO2 capture capacity and low thermal recovery. Coal fly ash has been extensively studied as a raw material for the synthesis of low-cost zeolite-like adsorbents for CO2 capture. Laboratory tests for CO2 adsorption onto coal fly ash zeolites (CFAZ) reveal promising results, but detailed computational studies are required to clarify the applicability of these materials as CO2 adsorbents on a pilot and industrial scale. The present study provides results for the validation of a simulation model for the design of adsorption columns for CO2 capture on CFAZ based on the experimental equilibrium and dynamic adsorption on a laboratory scale. The simulations were performed using ProSim DAC dynamic adsorption software to study mass transfer and energy balance in the thermal swing adsorption mode and in the most widely operated adsorption unit configuration.

scholarly journals Catalytic Pyrolysis of a Residual Plastic Waste Using Zeolites Produced by Coal Fly Ash

Catalysts ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1113
Author(s):  
Marco Cocchi ◽  
Doina De Angelis ◽  
Leone Mazzeo ◽  
Piergianni Nardozi ◽  
Vincenzo Piemonte ◽  
...  
Keyword(s):  
Fly Ash ◽  
Energy Demand ◽  
Catalytic Pyrolysis ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Plastic Waste ◽  
Scanning Calorimetry ◽  
Contact Mode ◽  
Degradation Temperature ◽  
Pyrolysis Oils

The plastic film residue (PFR) of a plastic waste recycling process was selected as pyrolysis feed. Both thermal and catalytic pyrolysis experiments were performed and coal fly ash (CFA) and X zeolites synthesized from CFA (X/CFA) were used as pyrolysis catalysts. The main goal is to study the effect of low-cost catalysts on yields and quality of pyrolysis oils. NaX/CFA, obtained using the fusion/hydrothermal method, underwent ion exchange followed by calcination in order to produce HX/CFA. Firstly, thermogravimetry and differential scanning calorimetry (TG and DSC, respectively) analyses evaluated the effect of catalysts on the PFR degradation temperature and the process energy demand. Subsequently, pyrolysis was carried out in a bench scale reactor adopting the liquid-phase contact mode. HX/CFA and NaX/CFA reduced the degradation temperature of PFR from 753 to 680 and 744 K, respectively, while the degradation energy from 2.27 to 1.47 and 2.07 MJkg−1, respectively. Pyrolysis runs showed that the highest oil yield (44 wt %) was obtained by HX/CFA, while the main products obtained by thermal pyrolysis were wax and tar. Furthermore, up to 70% of HX/CFA oil was composed by gasoline range hydrocarbons. Finally, the produced gases showed a combustion energy up to 8 times higher than the pyrolysis energy needs.

scholarly journals Insights into the competitive adsorption of pollutants on a mesoporous alumina–silica nano-sorbent synthesized from coal fly ash and a waste aluminium foil

RSC Advances ◽  
2020 ◽  
Vol 10 (26) ◽  
pp. 15514-15522
Author(s):  
Aditi Chatterjee ◽  
Shahnawaz Shamim ◽  
Amiya Kumar Jana ◽  
Jayanta Kumar Basu
Keyword(s):  
Heavy Metals ◽  
Fly Ash ◽  
Competitive Adsorption ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Mesoporous Alumina ◽  
Aluminium Foil ◽  
Key Factors ◽  
Highly Efficient

A highly efficient and low-cost alumina–silica nano-sorbent was fabricated and characterized to realize the key factors responsible for its superiority over the existing adsorbents in treating the wastewater for the removal of dyes and heavy metals.

Removal of Natural Organic Matter of Artificial Lake by Modified Fly Ash

2013 ◽  
Vol 690-693 ◽  
pp. 1020-1023
Author(s):  
Chang Nian Wu ◽  
Li Wang ◽  
Qi Ling ◽  
Yu Chao Tang ◽  
Jian Huang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Fly Ash ◽  
Natural Organic Matter ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Kinetic Studies ◽  
Artificial Lake ◽  
Sem Images ◽  
Sulfuric Acid Treatment ◽  
Surface Areas

Coal fly ash (CFA) modified by sulfuric acid treatment was used as a low-cost adsorbent for removing natural organic matter (NOM) in an artificial lake. The specific surface areas and SEM images of modified coal fly ash (MCFA) and CFA were observed. Two equilibrium models were compared to evaluate NOM removal process with a better fitting using the Freundlich model. Kinetic studies were also carried out to fit the experimental data. The pseudo second-order provided the highest coefficients of determination.

Fabrication and Application of Low-Cost Thiol Functionalized Coal Fly Ash for Selective Adsorption of Heavy Toxic Metal Ions from Water

2017 ◽  
Vol 56 (6) ◽  
pp. 1461-1470 ◽  
Author(s):  
Subhajit Dash ◽  
Haribandhu Chaudhuri ◽  
Radha Gupta ◽  
Udayabhanu G. Nair ◽  
Ashis Sarkar
Keyword(s):  
Fly Ash ◽  
Metal Ions ◽  
Selective Adsorption ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Toxic Metal ◽  
Toxic Metal Ions

Phase Evolution and Sintering Characteristics of Mullite-Based Ceramics Prepared from Coal Fly Ash, Calcined Bauxite and Ball Clay

2009 ◽  
Vol 79-82 ◽  
pp. 2019-2022 ◽  
Author(s):  
Xue Ma ◽  
Xiao Yao ◽  
Su Dong Hua
Keyword(s):  
Fly Ash ◽  
Flexural Strength ◽  
High Performance ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Transient Liquid Phase ◽  
Phase Evolution ◽  
Ball Clay ◽  
Sintering Characteristics ◽  
Increasing Temperature

The study provides a novel way for the utilization of coal fly ash, and enriches the sintering mechanism in preparation of low-cost, high performance mullite based ceramic. The phase evolution, microstructure, densification behavior and flexural strength as a function of the sintering temperatures, were investigated by XRD, SEM and evaluated by density, open porosity and shrinkage and three point bending method, respectively. Secondary mullite nucleates from the dissolution of alumina in transient liquid phase at 1300°C. Above 1400°C, mullite content increases and the densification is promoted with increasing temperature. Fast densification takes place and high flexural strength of 149MPa is achieved at 1600°C.

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