Effects of AlOOH Structure on the Reaction of Methanol and Carbon Monoxide†

doi:10.7503/cjcu20160862

Abstract

Abstract:

The AlOOH catalysts prepared by hydrothermal method were characterized and used for the reaction of methanol and carbon monoxide. The results showed that proper AlOOH structure dramatically improved the selectivity of acetaldehyde(97.28%) for the reaction of methanol and carbon monoxide. AlOOH structural distinction led to the differences of product distribution. Higher crystallinity, larger aperture, extensive CO dissociative adsorption centre and suitable acid-base of AlOOH catalysts significantly promoted selectivity of acetaldehyde. The acetaldehyde generated by the coupling of CH₃ and HCO.

Key words: AlOOH, Acetaldehyde, Methanol, Carbon monoxide, Hydrothermal method

CLC Number:

O643

TrendMD:

HAN Yanmei, GAO Zhihua, HUANG Wei. Effects of AlOOH Structure on the Reaction of Methanol and Carbon Monoxide^†[J]. Chem. J. Chinese Universities, 2017, 38(5): 823.

Figures/Tables 8

Fig.1 XRD patterns(A) and FTIR spectra(B) of different AlOOH catalystsa. C-L; b. C-N; c. C-H.

Fig.2 SEM images of different AlOOH catalysts (A) C-L; (B) C-N; (C) C-H.

Fig.3 N2 adsorption-desorption isotherms of different AlOOH catalysts■ C-L; ▲ C-N; ★ C-H.

Fig.4 TG-DTG curves of different AlOOH catalysts (A) C-L; (B) C-N; (C) C-H.

Fig.5 NH3 -TPD-MS profiles of different AlOOH catalystsa. C-H; b. C-L; c. C-N.

Fig.6 CO2-TPD-MS profiles of different AlOOH catalysts a. C-H; b. C-N; c. C-L.

Fig.7 CO-TPD-MS profiles of different AlOOH catalysts a. C-N; b. C-H; c. C-L.

Table 1 Catalytic performance of different AlOOH catalysts*

Catalyst	Feed gas	CO conv.(%)	Selectivity(%)
Catalyst	Feed gas	CO conv.(%)	AH	DME	C_xH_y
C-L	MeOH+CO	3.02	97.28	2.70	0.02
	MeOH+CO+H₂	2.81	94.51	5.48	0.01
C-N	MeOH+CO	5.13	99.78	0.22
	MeOH+CO+H₂	5.89	99.85	0.15
C-H	MeOH+CO	7.48	70.49	29.50	0.01
	MeOH+CO+H₂	5.46	59.71	40.08	0.21

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