Titania-alumina composites were carried out by various methods. The
composite prepared by mixed gelation method showed the merits of both
γ-Al2O3 and TiO2 (anatase), and it
behaved much better than the γ-Al2O3 alone as the
carrier of HDS catalyst or H2S adsorbent. Another representative composite
was prepared by sol-gel method. The hydroxide of aluminium alkoxide was
peptised directly with TiCl4 to form
TiO2-Al2O3 composite sol, and then the
composite membrane without support was obtained. The sizes of primary
particles were around 5nm as characterised by TEM.