Modified vermiculites as effective catalysts for dehydration of methanol and ethanol

被引：26

作者：

Marosz, Monika ^{[1
]}

Kowalczyk, Andrzej ^{[1
]}

Chmielarz, Lucjan ^{[1
]}

机构：

[1] Jagiellonian Univ, Fac Chem, Gronostajowa 2, PL-30387 Krakow, Poland

来源：

CATALYSIS TODAY | 2020年 / 355卷

关键词：

Vermiculite; Acid treatment; Intercalation; PILCs; Catalysis; Alcohols dehydration; DIMETHYL ETHER SYNTHESIS; ACID-ACTIVATED VERMICULITES; SOLID-ACID; DIETHYL-ETHER; GENERAL CHARACTERIZATION; PART I; NH3; DME; CU; ETHYLENE;

D O I：

10.1016/j.cattod.2019.07.003

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Two series of catalysts for the reactions of methanol and ethanol dehydration were obtained from vermiculite. The first series of the catalysts were obtained by treatment of raw clay with nitric acid solution. Such modification of vermiculite resulted in a significant increase of its specific surface area and also partial leaching of Al3+ and Fe3+ cations from clay layers. Acid treatment of vermiculite resulted in its activation in the processes of methanol and ethanol dehydration. The second series of the catalysts were obtained by intercalation of vermiculite with alumina pillars. Prior to the pillaring process, raw vermiculite was treated with nitric acid solution followed by complexation of Al3+ and Fe3+ cations, leached from clay layers, with oxalic acid or citric acid. Alumina pillared vermiculites, characterized by increased specific surface area, porosity and acidity, were found to be very active catalysts of alcohols dehydration. Catalytic performance of modified vermiculites was related mainly to the concentration and strength of acid sites present in the samples.

引用

页码：466 / 475

页数：10

共 45 条

[1] Activity and deactivation studies for direct dimethyl ether synthesis using CuO-ZnO-Al2O3 with NH4ZSM-5, HZSM-5 or γ-Al2O3 [J].

Abu-Dahrieh, Jehad ;

Rooney, David ;

Goguet, Alexandre ;

Saih, Youssef .

CHEMICAL ENGINEERING JOURNAL, 2012, 203 :201-211

[2] Reaction kinetics determination and neural networks modeling of methanol dehydration over nano γ-Al2O3 catalyst [J].

Alamolhoda, S. ;

Kazemeini, M. ;

Zaherian, A. ;

Zakerinasab, M. R. .

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, 2012, 18 (06) :2059-2068

[3]

[Anonymous], 2020, NAT MED, DOI [DOI 10.1038/S41591-020-0897-1, 10.1038/s41591-020-0897-1, DOI 10.1038/s41591-020-0897-1]

[4]

[Anonymous], [No title captured]

[5] Experimental and computer simulation study of the vibrational spectra of vermiculite [J].

Arab, M ;

Bougeard, D ;

Smirnov, KS .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2002, 4 (10) :1957-1963

[6] A novel method of copper-exchanged aluminum-pillared clay preparation for olive oil mill wastewater treatment [J].

Ben Achma, R. ;

Ghorbel, A. ;

Sayadi, S. ;

Dafinov, A. ;

Medina, F. .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2008, 69 (5-6) :1116-1120

[7] Pillared smectite modified with carbon and manganese as catalyst for SCR of NOx with NH3.: Part I.: General characterization and catalyst screening [J].

Chmielarz, L ;

Dziembaj, R ;

Grzybek, T ;

Klinik, J ;

Lojewski, T ;

Olszewska, D ;

Papp, H .

CATALYSIS LETTERS, 2000, 68 (1-2) :95-100

[8] Pillared smectite modified with carbon and manganese as catalyst for SCR of NOx with NH3.: Part II.: Temperature-programmed studies [J].

Chmielarz, L ;

Dziembaj, R ;

Grzybek, T ;

Klinik, J ;

Lojewski, T ;

Olszewska, D ;

Wegrzyn, A .

CATALYSIS LETTERS, 2000, 70 (1-2) :51-56

[9] Selective reduction of NO with NH3 over pillared clays modified with transition metals [J].

Chmielarz, L ;

Kustrowski, P ;

Zbroja, M ;

Lasocha, W ;

Dziembaj, R .

CATALYSIS TODAY, 2004, 90 (1-2) :43-49

[10] Effect of water vapour and SO2 addition on stability of zirconia-pillared montmorillonites in selective catalytic reduction of NO with ammonia [J].

Chmielarz, L ;

Dziembaj, R ;

Lojewski, T ;

Wegrzyn, A ;

Grzybek, T ;

Klinik, J ;

Olszewska, D .

SOLID STATE IONICS, 2001, 141 :715-719

← 1 2 3 4 5 →