Combustion Characteristics of Refuse Derived Fuel (RDF) in a Fluidized Bed Combustor

Posted on March 10, 2014 ·

Alhamdulillah, a new publication was successfully produced. Here is detail and abstract of the new publication in Sains Malaysiana.

A. Johari*, R. Mat, H. Alias, H. Hashim, M.H. Hassim, Z.Y. Zakaria, M. Rozainee, Combustion Characteristics of Refuse Derived Fuel (RDF) in a Fluidized Bed Combustor, Sains Malaysiana 43 (1)(2014): 103–109. Impact Factor: 0.408 (PDF).

Combustion Characteristics of Refuse Derived Fuel (RDF) in a Fluidized Bed Combustor

JOHARI*, R. MAT, H. ALIAS, H. HASHIM, M.H. HASSIM, Z.Y. ZAKARIA & M. ROZAINEE

ABSTRACT

The combustion characteristics of refuse derived fuel (RDF) in a fluidized bed have been studied. The gross heating value (GHV) of the RDF was 14.43 MJ/kg with moisture content of 25% by weight. Parameters of interest for sustainable bed combustion were the fluidization number and primary air factor. The study was performed in a rectangular fluidized bed combustor with dimensions of 0.3 m in width, 0.7 m in length and 2 m in height. Sand with mean particle size of 0.34 mm was used as a fluidization medium. The sand bed height was at 0.3 m above the standpipes air distributor. The range of fluidization number under investigation was 5–7 Umf in which 5 Umf was found to be the optimum. The study was continued for the determination of the optimum primary air factor with the selected range of primary air factors being 0.6, 0.8, 1.0 and 1.2 in experiments conducted at 5 Umf. The final results showed that the optimum primary air factor was at 0.8. An energy balance was also performed to determine the thermal efficiency of the combustion. It was concluded that the thermal efficiency depended on the bed temperature and the primary air factor being used.

Keywords: Air factor; fluidized bed combustor; fluidization number; operating parameter; refuse derived fuel (RDF); thermal efficiency

More of my published journals are published here.

Filed Under: 1 Academic, 2 Research, 3 Writing, 4 Publication Tagged With: , , , , , ,

Publication in Advances in Chemical Engineering and Sciences

Posted on December 21, 2013 ·

Alhamdulillah, we managed to publish in another great journal. Here is the detail:

Mazura Jusoh, Anwar Johari, Norzita Ngadi, Zaki Yamani Zakaria, Process Optimization of Effective Partition Constant in Progressive Freeze Concentration of Wastewater, Advances in Chemical Engineering and Science, 2013, 3, 286-293 (PDF).

Process Optimization of Effective Partition Constant in Progressive Freeze Concentration of Wastewater
Mazura Jusoh, , Anwar Johari, Norzita Ngadi, Zaki Yamani Zakaria

ABSTRACT

Response surface methodology (RSM) was employed to optimize the process parameters for effective partition constant (K) in progressive freeze concentration (PFC) of wastewater. The effects of coolant temperature, circulation flowrate, initial solution concentration and circulation time on the effective partition constant were observed. Results show that the data were adequately fitted into a second-order polynomial model. The linear and quadratic of independent variables, coolant temperature, circulation flowrate, initial solution concentration and circulation time as well as their interactions have significant effects on the effective partition constant. It was predicted that the optimum process parameters within the experimental ranges for the best K would be with coolant temperature of −8.8˚C, circulation flowrate of 1051.1 ml/min, initial solution concentration of 6.59 mg/ml and circulation time of 13.9 minutes. Under these conditions, the effective partition constant is predicted to be 0.17.

Keywords: Effective Partition Constant; Wastewater Treatment; Progressive Freeze Concentration

More of my published journals are published here.

Filed Under: 2 Research, 3 Writing, 4 Publication, 6 Supervision Tagged With: , , , , ,

My New Publication in Biomass Bioenergy

Posted on November 20, 2013 ·

I managed to published my second journal for my PhD in another reputable Q1 journal.

Zaki Y. Zakaria, Nor Aishah Saidina Amin, Juha Linnekoski, Perspective on catalytic conversion of glycerol to olefins, Biomass and Bioenergy 55 (2013) 370-385. Impact Factor: 2.975 (PDF).

A perspective on catalytic conversion of glycerol to olefins
Zaki Y. Zakaria, Nor Aishah Saidina Amin, Juha Linnekoski

Glycerol, an alcohol and oxygenated chemical from biodiesel production, has enormous potential to be converted into higher value-added fuels and chemicals. Conversion of glycerol to olefins, although relatively new, has been proven viable by the limited number of literatures available. However, the studies on alcohol-to-hydrocarbons involving methanol and ethanol conversions to hydrocarbons (MTHC and ETHC) have extensively been conducted. Due to the increasing amount of glycerol produced worldwide and the importance of olefins in the industry, it is therefore essential to have broadened knowledge on the technology of glycerol conversion to olefin (GTO). This review focuses on GTO with reference to the more established MTHC and ETHC studies. The chemistry and reaction schemes for methanol and ethanol reactions to produce hydrocarbons are also reviewed to provide some basics study for GTO. Catalytic conversion processes with different raw
materials for obtaining olefins are then compared with GTO. GTO offers viable, sustainable and environmental friendly technology for green olefins production from renewable resources, and concerted efforts should be geared to explore its potential.

Filed Under: 1 Academic, 2 Research, 3 Writing, 4 Publication Tagged With: , , , , ,

Publication in Chemical Engineering Journal

Posted on December 28, 2012 ·

Alhamdulillah, I managed to publish a new manuscript in a Q1 rated journal. The title of my paper is “Catalyst screening for conversion of glycerol to light olefins”, Chemical Engineering Journal 207–208 (2012) 803–813.

Here is the abstract:

Catalyst screening for conversion of glycerol to light olefins

Screening of modified ZSM-5 catalysts for conversion of glycerol to light olefins has been investigated. In this study HZSM-5, Al/ZSM-5, Ca/ZSM-5, Cr/ZSM-5, Cu/ZSM-5, Li/ZSM-5, Mg/ZSM-5 and Ni/ZSM-5 zeolite catalysts were prepared, tested and screened. The catalysts were characterized to relate their properties with catalyst activity. XRD and FTIR characterization results demonstrated that the structure of the catalysts remained intact while BET revealed the surface and micropore areas decreased after metal loading. TPR data exhibited the reduction phenomenon of the catalysts. NH3-TPD analysis indicated that Cu/ZSM5 catalyst has relatively more moderate and strong active acid sites compared to others. GC TCD/FID analysis detected light olefins and paraffins; methane, CO and CO2 in the gaseous product stream. The acidity of the catalyst affected olefin production, but no direct correlation between surface area and olefin yield was observed. The turnover frequency (TOF) for Cu/ZSM-5 and Cr/ZSM-5 catalysts were significantly high comparatively. Cu/ZSM-5 produced the highest light olefins selectivity and yield due to the synergistic effect of the physico-chemical properties between the parent ZSM-5 and the metals.

To read the paper, just click here to download the PDF.

It is also listed in my Publication > Journals Tab in this site.

Filed Under: 1 Academic, 2 Research, 3 Writing, 4 Publication Tagged With: , , , , ,

Publication in Journal of Applied Sciences

Posted on November 28, 2010 ·

Alhamdulillah, I managed to published a new manuscript titled “Catalyst Screening for catalytic conversion of glycerol to olefins”, in Journal of Applied Science 10(12): 1166-1170, 2010. This is a Scopus indexed Journal.

Following is the link to my manuscript in PDF form. It is also listed in my Publication > Journals Tab in this site.

Filed Under: 1 Academic, 2 Research, 3 Writing, 4 Publication Tagged With: , , ,
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