Characteristics of the Synthesis of Methanol Using Biomass-Derived Syngas

Yin, Xiuli; Leung, Dennis Y.C.; Chang, Jie; Wang, Junfeng; Fu, Yan; Wu, Chuangzhi

doi:10.1021/ef0498622

Cited by 78 publications

(54 citation statements)

References 22 publications

(31 reference statements)

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“…This situation gives rise to environmental problems, in the form of greenhouse gases emissions [6; 11]. When this gas is upgraded via CO 2 reforming under stoichiometric conditions of methane and carbon dioxide, it is possible to obtain a syngas with a H 2 /CO ratio close to 2, which is the ratio suitable for methanol synthesis [12]. This process can be considered as a partial recycling of carbon dioxide, since half of the carbon dioxide produced in the combustion of the methanol is consumed [6].…”

Section: Introductionmentioning

confidence: 99%

Syngas from CO2 reforming of coke oven gas: Synergetic effect of activated carbon/Ni–γAl2O3 catalyst

Bermúdez

Arenillas

Menéndez

2011

International Journal of Hydrogen Energy

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The CO 2 reforming of coke oven gas for the production of synthesis gas has been studied over an activated carbon, an in-lab prepared Ni/Al 2 O 3 catalyst and physical mixtures of both materials in different proportions (AC+Ni) at 800 ºC. It was found that there are two possible coexisting reaction pathways: the direct dry reforming of methane (decomposition of methane followed by gasification of the carbon deposits) and the reverse water gas shift reaction followed by the steam reforming of methane. If the process is carried out with the physical mixtures AC+Ni, there is a synergetic effect between both materials. The experimental conversions are higher than the conversions predicted by the law of mixtures, whereas the production of water is lower, resulting in a higher selectivity. The mixtures also showed a lower loss of porosity than when the activated carbon and the in-lab prepared Ni/Al 2 O 3 were used individually. Therefore, the combination of these materials may produce catalysts that are more resistant to deactivation. The synthesis gas obtained was analyzed and it was found suitable for the production of methanol.

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Section: Introductionmentioning

confidence: 99%

Syngas from CO2 reforming of coke oven gas: Synergetic effect of activated carbon/Ni–γAl2O3 catalyst

Bermúdez

Arenillas

Menéndez

2011

International Journal of Hydrogen Energy

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“…[1][2][3] Methanol can be obtained by gasification of sources other than oil: natural gas, coal, and lignocellulosic biomass; the latter contributing to the net reduction of CO 2 emissions. 4 The CMHC process is complementary to the steam cracking of naphtha and the methanol to olefins (MTO) process, which together with fluid catalytic cracking (FCC) produces most of the olefins. 5,6 The integration of paraffin cracking (endothermic) and methanol transformation (exothermic) in the same reactor allows working without supplying or removing heat, which is a determining factor in the two individual reactions.…”

Section: Introductionmentioning

confidence: 99%

Olefin production by cofeeding methanol and n‐butane: Kinetic modeling considering the deactivation of HZSM‐5 zeolite

et al. 2010

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The joint transformation of methanol and n-butane fed into a fixed-bed reactor on a HZSM-5 zeolite catalyst has been studied under energy neutral conditions (methanol/ n-butane molar ratio of 3/1). The kinetic scheme of lumps proposed integrates the reaction steps corresponding to the individual reactions (cracking of n-butane and MTO process at high-temperature) and takes into account the synergies between the steps of both reactions. The deactivation by coke deposition has been quantified by an expression dependent on the concentration of the components in the reaction medium, which is evidence that oxygenates are the main coke precursors. The concentration of the components in the reaction medium (methanol, dimethyl ether, n-butane, C 2 AC 4 paraffins, C 2 AC 4 olefins, C 5 AC 10 lump, and methane) is satisfactorily calculated in a wide range of conditions (between 400 and 550 C, up to 9.5 (g of catalyst) h (mol CH 2 )À1 and with a time on stream of 5 h) by combining the equation of deactivation with the kinetic model of the main integrated process.

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“…[50][51][52] The beneficial effect of water and its presence in methanol production as impurity shows that a profound understanding of the effect of water on the MTO reaction is urgently needed.…”

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confidence: 99%

Insight into the Effect of Water on the Methanol-to-Olefins Conversion in H-SAPO-34 from Molecular Simulations and in Situ Microspectroscopy

et al. 2016

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The role of water in the methanol-to-olefins (MTO) process over H- has been elucidated by a combined theoretical and experimental approach, encompassing advanced molecular dynamics simulations and in-situ micro-spectroscopy. First principle calculations at the molecular level point out that water competes with methanol and propene for direct access to the Brønsted acid sites. This results in less efficient activation of these molecules, which are crucial for the formation of the hydrocarbon pool. Furthermore, lower intrinsic methanol reactivity towards methoxide formation has been observed. These observations are in line with a longer induction period observed from in-situ UV-Vis micro-spectroscopy experiments. These experiments revealed a slower and more homogeneous discoloration of H-SAPO-34, while insitu confocal fluorescence microscopy confirmed the more homogeneous distribution and larger amount of MTO intermediates when co-feeding water. As such it is show that water induces a more efficient use of the H-SAPO-34 catalyst crystals at the microscopic level. The combined experimental theoretical approach gives a profound insight into the role of water on the catalytic process at the molecular and single particle level.

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Characteristics of the Synthesis of Methanol Using Biomass-Derived Syngas

Cited by 78 publications

References 22 publications

Syngas from CO2 reforming of coke oven gas: Synergetic effect of activated carbon/Ni–γAl2O3 catalyst

Syngas from CO2 reforming of coke oven gas: Synergetic effect of activated carbon/Ni–γAl2O3 catalyst

Olefin production by cofeeding methanol and n‐butane: Kinetic modeling considering the deactivation of HZSM‐5 zeolite

Insight into the Effect of Water on the Methanol-to-Olefins Conversion in H-SAPO-34 from Molecular Simulations and in Situ Microspectroscopy

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