Experimental Catalyst preparation

The Cu/ZrO2/CeO2 (CZC) catalysts were synthesized from metal sols, prepared from the appropriate amounts of the mixed precursors (NH4)2Ce(NO3)6, ZrO(NO3)2×H2O and Cu(NO3)2×2.5 H2O (all solutions are Aldrich products of > 99% purity), dissolved in 40 ml of distilled water. The total metal content of the resulting sol was 5×10-3 mol. By increasing the pH above 10 through addition of NaOH solution, the co-precipitation of the metal sols as metal hydroxides was achieved. The resulting precipitate was repeatedly washed with distilled water until pH=7 was obtained. The solution was then suspended in a mixture of 5 ml of distilled water and a calculated amount of 90% HNO3 obtained. Depending on the sample composition, the HNO3/metal molar ratio was varied between 1:1 and 1.5:1. Ultrasonic treatment of the suspension for 45 – 60 min resulted in the formation of a transparent sol.

Templating process was carried out by using XAD-16 non-functionalized polystyrene beads (a Sigma product); with a specific surface area of 800 m2g-1 and an average pore diameter of 10 nm. 1.5 ml of the wet beads and 0.005 mol of the metal sol were mixed together and then heated in an oven at 333 K for 2 days in order to ensure solvent evaporation. In a subsequent manner, the beads were dried at 373 K for one extra day and the rinsed thoroughly with distilled water to remove excess deposit from their surface. Later, the beads were dried at 333K for 1 day and then calcined in an oven at 773 K in a N2 stream of 100 ml/min for 2.5 h and then for an additional 8 h in air. After calcinations

Don't use plagiarized sources. Get Your Custom Essay on
Experimental Catalyst preparation
Just from $9/Page
Order Essay
Place your order
(550 words)

Approximate price: $22

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
The price is based on these factors:
Academic level
Number of pages
Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more
error: Content is protected !!
Open chat
Need assignment help? You can contact our live agent via WhatsApp using +1 718 717 2861

Feel free to ask questions, clarifications, or discounts available when placing an order.
  +1 718 717 2861           + 44 161 818 7126           [email protected]
  +1 718 717 2861           + 44 161 818 7126           [email protected]