Spanish sepiolite

Figure 1. X-ray diffractogram and chemical composition of the Spanish sepiolite (from TOLSA S.A.) used in this work.

Figure 5. The effects of vanadium on a cracking catalyst activity before and after addition of a metal scavenger (Spanish sepiolite).

Figure 2. X-ray diffractogram of Spanish sepiolite after (A) calcination in air at 800°C/lh (B) loading with 5% V and calcination in air at 540°C/10h (C) sample B calcined at 800°C/lh and (D) sample D steam-aged.

Figure 3. Raman spectra of (A) Spanish sepiolite calcined at 800°C (B) Spanish sepiolite containing 5% V, calcined at 800°C/lh, (C) Sample B steamed, (D) IMV-sepiolite containing 5% V, calcined at 800°C/lh, and (E) Sample D steamed.

Figure 6. The XPS spectrum and Ni curve fit for a sample of Spanish sepiolite (loaded with 2%and calcined at 850°C) after reduction at 400°C/lh.

Corma. A Martin. RM Perez-Pariente. J. The use of basic sepiolite as KiUK venaget reaction catalyst (Consejo Superior dc Investigaciones Cicntificas. Spain). 1991 Spanish Patent ref- ES202I910. 

Four natural silicates were used diatoroite or kieselguhr, sepiolite, palygorskite and bentonite. All of them were from Spanish deposits of great abundance and purity. 

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