Dear Abdulkreem Alsultan,
A theoretical background upon your question, which you may find useful in your research, is presented in the following two papers:
Kyriakopoulos, G., Doulia, D. (2006). Adsorption of pesticides on carbonaceous and polymeric materials from aqueous solutions: A review. Separation and Purification Reviews, 35(3), 97- 191.
Doulia, D. , Leodopoulos, Ch., Gimouhopoulos, K., Rigas, F. (2009). Adsorption of humic acid on acid-activated Greek bentonite. Journal of Colloid and Interface Science, 340(2), 131-141.
Dear Abdulkreem Alsultan,
In my opinion you should experiment with a wide spectrum of chemical substances, in order to activate carbon. Subsequently, the optimum adsorbents should follow the appropriate specific surface area and porosity for catalyst biodiesel applications. In parallel, it should be helpful you to apply relevant analytical techniques, such as SEM, XRD, FTIR, in order to characterize the chemical composition and the molecular structure of the activated carbon. You should also take into consideration that the adsorbate-adsorbent interface plays a dominant role to reveal both the catalyst nature/design (compact packing and molecules’ arrangement) and the catalyst capacity.
Dear friend
During many years I use Vulcan XC-72 from Cabot Corporation which they presented me many years ago. I thing in electrocatalysis it is best
For catalytic bio-diesel production, in my opinion, these activated carbons should bear catalytically active sites, usually acidic or basic sites. On the other hand, carbons need large surface area to offer large amounts of active sites and suitable pore size distribution to permit the entrance of reactants.
I guess if you wanted a fixed bed reactor you could use the largest pore you find with good streng. Otherwise you could use in powder form,I would prefer a filtrable and large pore and large surface area one. In terms of active center you could get a basic function(highest kpb you get), forget alcalis -> soap! The group must be regenerable without losses of active sites. I have a patent using sulfonic groups if you wanted strong acidic groups.
Dear Abdul,
To answer your query, i would place two things about Activated Carbons (ACs):
1. Controlling the surface area and pore size of ACs: when one prepares ACs, it depends on the method of chemical or physical activation that how much surface area/pore size can be generated.mostly chemical activation provides the highest surface area/pore size. (http://www.sciencedirect.com/science/article/pii/S1385894711001562)
2. For catalytic bio-diesel application: biodiesel products is mostly catalyzed by acidic or basic sites. Moreover, basic sites are reported to catalyze higher rates than the acidic sites. Also, the rate and yield depends on the strength of these sites. Organic functionalization provides you weaker sites than inorganic ones. but at the same instance, activated carbons provides higher surface area than inorganic catalysts (exception mesoporous material like MCM-41, SBA-15).
then comes your exact question, what would i recommends ?
I recommend you for stronger basic sites (that you find on inorganic sites) + higher surface area (that you can find on ACs). That means inorganic functionalization over organic material (ACs) contrary to most reported organic functionalization over inorganic material. this might carry a novelty as organic over organic, inorganic over inorganic and organic over inorganic are reported in plenty (you can find over sciencedirect).
let me know if this helps you.
- Badges
- Science method
- Similar topics
- Methodology
- Crystallography
- X-ray Diffraction