Utilization of Fly-Ash Products from Biomass Co-combustion and Zeolite 13X for Building Energy Conservations

Author(s):  
C. W. Kwong ◽  
C. Y. H. Chao
Keyword(s):  
Fly Ash ◽  
2014 ◽  
Vol 675-677 ◽  
pp. 724-727 ◽  
Author(s):  
Wei Wei Tu ◽  
Yong Feng Zhang ◽  
Jie Bai ◽  
Wei Liu

Synthesis of pure-form zeolite 13X was investigated using the alkali fusion-hydrothermal method to dissolve Si and Al sources from fly ash, and with the addition of Si source, to prepare initial gel. Experimental results demonstrated, the regular morphology and homogeneous composition are in good agreement with standard zeolite 13X by characterization of XRD, SEM and IR. The properties of adsorption and CEC values were evaluated by BET and UV-spectrophotometry, respectively. All properties are much better than commercial zeolite 13X. Our results further revealed that like coal fly ash after alkali fusion pretreatment can be used for zeolite synthesis. Thus, It demonstrates a promising feedstock for the green synthesis of zeolites directly without experiencing intermediate chemicals.


Fuel ◽  
2017 ◽  
Vol 193 ◽  
pp. 385-394 ◽  
Author(s):  
Aroon Kongnoo ◽  
Supak Tontisirin ◽  
Patcharin Worathanakul ◽  
Chantaraporn Phalakornkule

2011 ◽  
Vol 374-377 ◽  
pp. 1258-1264
Author(s):  
Yuan Yang ◽  
Qun Hu Xue ◽  
Shou De Li

Production process of sintered thermal insulation wall material with high content fly ash was investigated in this paper. The proper addition amount of fly ash, the types and addition amount of the binders, the demand of molding and the molding process as well as the schedule of sintering was determined. The results show that: When the addition amount of fly ash is 65wt.%, the plasticity index of mixture mad is still more than 8. The compressive strength of the sintered sample can reach 12MPa; the porosity is in the range of 40-50%; Bulk density is 1.45g/cm3. If the macro porosity of the industrial product is designed as 40%, the final bulk density can reach 1.40g/cm3, and the theoretical thermal conductivity is less than 0.88w/(m2•K). This product can meSuperscript textet the demand of building energy saving and replace traditional external wall thermal insulation materials.


2015 ◽  
Vol 744-746 ◽  
pp. 1398-1401
Author(s):  
Hai Yan Guo ◽  
Jian Bing Ye

Taking a six-story glass bead thermal insulation concrete frame structure building in Kangding, Sichuan as model, to design filler wall composing of fly ash autoclaved aerated concrete block. Utilizing energy dissipation theory analyzes the building energy consumption. Conclusion: The glass bead thermal insulation concrete frame structure of fly ash autoclaved aerated concrete block filler wall meets the requirement of Sichuan residential building energy-saving code.


2020 ◽  
Vol 165 ◽  
pp. 05013 ◽  
Author(s):  
Zhang Zhanhua ◽  
lI jie ◽  
Shi Changyu ◽  
Zhang Chao ◽  
Wang An ◽  
...  

With the acceleration of globalization, industrialization and informatization, the consumption of energy resources is increasing, and the building energy consumption accounts for about 30%, so the building energy conservation has become an important part of energy conservation and emission reduction. At the same time of economic development, we should reduce building energy consumption and do a good job in building energy conservation [1], and put forward the following ways: the improvement of building’s own heat preservation and insulation performance; the improvement of energy utilization system efficiency such as electricity and heating; the development and utilization of new energy; and the proper management of energy utilization equipment system. Among them, the most effective way is to improve the thermal insulation performance of the building itself. The thermal insulation of enclosure and the air tightness of doors and windows are two important parts of thermal insulation. According to the relevant data [2], the heat loss of enclosure structure accounts for 40-50% of the building energy consumption, and the heat loss of wall structure accounts for about 70%. Therefore, the improvement of the thermal insulation requirements of the wall structure plays a huge role in building energy conservation In this paper, the experimental research on the exterior wall thermal insulation board of decoration and heat preservation integration is carried out. The influence of fly ash content, asbestos fiber content, composite active activator, waterproof agent and other additives on the physical properties of fiber-reinforced fly ash / cement board is discussed. The optimal content of various factors is determined and its mechanism is analyzed. The optimum proportion of fiber reinforced fly ash / cement board was determined by orthogonal test.


Author(s):  
C. W. Kwong ◽  
C. Y. H. Chao ◽  
K. S. Hui

The potential use of biomass co-combustion derived fly-ash products and zeolite 13X for the elimination of volatile organic compounds (VOCs) using ozone was investigated for an integrated solar-assisted air purification and desiccant cooling system. Fly-ash products from rice husk-coal co-combustion at different biomass blending ratios were used as the adsorbent/catalyst materials. The material characteristics of the adsorbent/catalyst materials such as metal content and surface area were compared and correlated with the catalytic activities. It was found that the surface area and the metal constitutes have made the catalytic activities over the fly-ash products from biomass co-combustion superior to that from coal-only combustion. The elevated reaction temperatures from 25°C to 75°C also have significant effects on the removal of VOCs. The apparent activation energies of the reaction path over the fly-ash products with the addition of ozone to the air were reduced, when compared with the use of air as an oxidant. On the other hand, the potential synergy to Zeolite 13X was explored. The combined catalytic ozonation and adsorption enhanced the VOCs removal and at the same time reduced the intermediates emission. Furthermore, the hydrophilic properties of zeolite 13X could be utilized to handle the latent load of the solar-assisted ventilation system for energy conservations.


Author(s):  
L. L. Sutter ◽  
G. R. Dewey ◽  
J. F. Sandell

Municipal waste combustion typically involves both energy recovery as well as volume reduction of municipal solid waste prior to landfilling. However, due to environmental concerns, municipal waste combustion (MWC) has not been a widely accepted practice. A primary concern is the leaching behavior of MWC ash when it is stored in a landfill. The ash consists of a finely divided fly ash fraction (10% by volume) and a coarser bottom ash (90% by volume). Typically, MWC fly ash fails tests used to evaluate leaching behavior due to high amounts of soluble lead and cadmium species. The focus of this study was to identify specific lead bearing phases in MWC fly ash. Detailed information regarding lead speciation is necessary to completely understand the leaching behavior of MWC ash.


1997 ◽  
Vol 9 (6) ◽  
pp. 541-565 ◽  
Author(s):  
Cheryl R. Killingsworth ◽  
Francesca Alessandrini ◽  
G. G. Krishna Murthy ◽  
Paul J. Catalano ◽  
Joseph D. Paulauskis ◽  
...  

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