Production of chemicals from methanol I. Low molecular weight olefins

Kaeding, Warren W.; Butter, S. A.

doi:10.1016/0021-9517(80)90351-6

Cited by 329 publications

(78 citation statements)

References 2 publications

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“…The BET analysis in Table 1 shows that the surface area (S BET ) of P-modified HZSM-5 decreases as the increases of P content. It is likely due to the reduction of pore dimensions or partial pore blockage of the HZSM-5 by the P species introduced in the treatment [17,21]. This conclusion is verified by the decrease of micro pore volume in Table 1.…”

Section: Physicochemical Properties Of Catalystsupporting

confidence: 78%

Effect of P Content on the Catalytic Performance of P-modified HZSM-5 Catalysts in Dehydration of Ethanol to Ethylene

2008

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A series of phosphorus (P) modified HZSM-5 catalysts were prepared and characterized with various techniques. These catalysts were used in dehydration of ethanol to ethylene at different temperatures. It was found that not all the P-modified catalysts favor this reaction at high temperatures. Over the catalyst with 3.4 wt% P, the main product is ethylene at 573-713 K, due to the presence of weak acid sites after P modification. When the P loading is below 3.4 wt%, ethylene and higher hydrocarbons are observed at high temperatures. As P content is above 3.4 wt%, higher reaction temperature is necessary for ethanol dehydration to ethylene.

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Section: Physicochemical Properties Of Catalystsupporting

confidence: 78%

Effect of P Content on the Catalytic Performance of P-modified HZSM-5 Catalysts in Dehydration of Ethanol to Ethylene

2008

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“…High selectivity of propylene has been obtained on modified ZSM-5 zeolites [2,3]. Phosphorusmodified ZSM-5 has been extensively investigated in methanol conversion [4][5][6][7][8][9][10][11][12][13][14], and catalytic cracking reaction [15][16][17][18][19][20]. The structure of p-modified ZSM-5 has been characterized by many research groups [21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Conversion of Methanol to Hydrocarbons over Phosphorus-modified ZSM-5/ZSM-11 Intergrowth Zeolites

et al. 2009

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The phosphorus-modified ZSM-5/ZSM-11 intergrowth zeolites has been used for the catalytic conversion of methanol to hydrocarbons. As evidenced by MAS NMR and NH 3 -TPD, the modification by phosphorus leads a distinct decrease of the BrØnsted acid sites and the acid strength of the catalysts in comparison with the parent ZSM-5/ZSM-11, which causes a dramatic improvement of the selectivity towards propylene. At 400°C, the ratio of propylene to ethylene can reach about 8.0. A comparison with the conventional ZSM-5 zeolite has been also carried out in the present study.

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“…In general, however, there is little direct structural information on the nature of covalent attachments of the phosphorus groups to the zeolite. An early example of a reaction with a phosphorus compound made use of trimethyl phosphite [8], which is believed [8][9][10] to undergo transesterification with an OH on the sur-SCHEME 1 face (Z) to form Z-OP(OMe) 2 , ultimately converted to Z-OP(O)(OH) 2 . Neither grouping has been confirmed by NMR spectroscopy, however.…”

Section: Introductionmentioning

confidence: 99%