American Math. Soc. Semicentennial Pubs (Vol 1 of 2) by R. Archibald

By R. Archibald

Show description

Read Online or Download American Math. Soc. Semicentennial Pubs (Vol 1 of 2) PDF

Similar nonfiction_6 books

The life of the Mahāsiddha Tilopa

Biography of an Indian Buddhist priest Tillopåada, 988-1069, the grasp of Mar-pa Chos-kyi-blo-gros.

The Davidic Messiah in Luke-Acts: The Promise and Its Fulfillment in Lukan Christology

The character of Lukan christology has been a lot debated lately, with students claiming the pre-eminence of such different types as Lord, Prophet, Christ, or Isaianic Servant. within the current paintings the writer examines one significant subject matter inside Luke's christology, that of the arriving king from the road of David.

A new island biogeography of the sea of Cortés

Historical past of clinical exploration within the Sea of Cortés / George E. Lindsay and Iris Engstrand --
Geology and a while of the islands / Ana Luisa Carreño and Javier Helenes --
Physical oceanography / Saul Álvarez-Borrego --
Plants / Martin L. Cody . .. [et al. ] --
Ants / April M. Boulton and Philip S. Ward --
Tenebrionid beetles / Francisco Sanchez Piñero and Rolf L. Aalbu --
Rocky-shore fishes / Donald A. Thomson and Matthew R. Gilligan --
Nonavian reptiles : origins and evolution / Robert W. Murphy and Gustavo Aguirre-Léon --
Reptiles : ecology / Ted J. Case --
Land birds / Martin L. Cody and Enriqueta Velarde --
Breeding dynamics of Heermann's gulls / Enriqueta Velarde and Exequiel Ezcurra --
Mammals / Timothy E. Lawlor . .. [et al. ] --
Island foodstuff webs / Gary A. Polis . .. [et al. ] --
Human effect within the Midriff Islands / Conrad J. Bahre and Luis Bourillón --
Cultural dispersal of crops and reptiles / Gary P. Nabhan --
Ecological conservation / Exequiel Ezcurra . .. [et al. ]

Extra resources for American Math. Soc. Semicentennial Pubs (Vol 1 of 2)

Sample text

The increase of SiO,/Al,O, ratio leads to the reduction of acid sites concentration and, consequently, to a change in catalytic properties Zeolite Catalysis in the Conversion of Methanol into Olejns 45 of mordenite. Zeolites X and Y have faujasite-like structure. The typical composition of these zeolites can be expressed as gH,O, NapAlpSi,,,-pO,,, where p varies between 74 and 96 for X zeolite and from 48 to 74 for Y zeolite. The value of q is between 250 and 270. The faujasite framework is an array of truncated, octahedra linked by D6R prisms (Figure 9).

The lower acid strength of Fe-silicate, which was evidenced by NH,-TPD experiments, was held responsible for this. 4% butene). The conversion was not specified, but it was not complete. 8 C-mol%. 16, studied the catalytic properties of beryllium-silicates with a zeolite-type structure. Methanol conversion yielded primarily olefins, while on the isostructural aluminum-silicate catalyst paraffins and aromatics were obtained. The methanol conversion was considerably higher on the [Al]-ZSM-5 than on the [Be]-ZSM-5, except in one example (Table 12).

Judging from the product distribution, this must have been high. At 600 "C and complete conversion of methanol, a selectivity of 70 w t % C,-C, olefins was obtained. For moderate reaction conditions, Dehertog and Fromentlo4 also reported a significant increase in the maximum yield of light olefins on PHZSM-5 as compared with HZSM-5. At temperatures above 480 "C this effect was no longer observable. 6% on P-HZSM-5. VBdrine et a1 ,1 3 2 however , attained higher yields on the P-modified zeolites at higher temperature: at 480 "C the hydrocarbon fraction obtained on the P-ZSM-5 contained 71 w t % C,-C, olefins, whereas with HZSM-5 this was only 49 w t % at comparable methanol conversions (83% to 86%).

Download PDF sample

Rated 4.02 of 5 – based on 47 votes