Low-temperature methanol synthesis in a circulating slurry bubble reactor

Zhang, Kai; Song, Huisen; Sun, Dazhi; Li, Shunfen; Yang, Xiangui; Zhao, Yu‐Long; Huang, Zhenguo; Wu, Yutang

doi:10.1016/s0016-2361(02)00221-1

Cited by 38 publications

(22 citation statements)

References 14 publications

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“…In this reaction, alkali alkoxide/nickel compound system [6,7] and alkali alkoxide/copper compound system were developed [8][9][10][11]; however, the deactivation was still not solved due to use of alkali metal methoxide [9,10]. Researchers have tried many kinds of compounds to replace alkali methoxide.…”

Section: Oh ð3þmentioning

confidence: 99%

Low Temperature Methanol Synthesis in Slurry Phase With a Hybrid Copper-Formate System

Fujimoto

2009

Catal Lett

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A novel catalyst system composed of sodium formate and copper magnesium catalyst was developed to synthesize methanol from syngas (CO/H 2 = 1/2) in ethanol solvent at 5.0 MPa and 160°C. The pH value was found to exert an important effect on the reaction activity of the co-precipitated Cu/MgO-Na catalyst; the reaction performance of the catalyst system was also sensitively dependent on the reaction temperature in the range of 150-180°C. The successive experiment results indicated that the combination of formate species and copper catalyst should be the active site. In addition, the carbonylation step was the limiting-rate step, which was restrained by the equilibrium.

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Section: Oh ð3þmentioning

confidence: 99%

Low Temperature Methanol Synthesis in Slurry Phase With a Hybrid Copper-Formate System

Fujimoto

2009

Catal Lett

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“…The MES system adopts a partial recycling scheme, recycling part of the unreacted gas back to the reactor. Methanol synthesis is simulated by specifying the temperature approach to real industrial data (the temperature approaching equilibrium was about 38 K [22]). At a pressure of 76 bar, the reactor is maintained at the temperature of 523 K by evaporation of the cooling water.…”

Section: Description and Basic Idea Of The Multifunctional Energy Sysmentioning

confidence: 99%

A Polygeneration System Based on Multi-Input Chemical Looping Combustion

Zhang

Jin

2014

Energies

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This paper proposes a polygeneration system based on a multi-input chemical looping combustion system, which generates methanol and electricity, through the use of natural gas and coal. In this system, the chemical looping hydrogen (CLH) production system and the coal-based methanol production system are integrated. A high quality fuel, natural gas, is used to improve the conversion ratio of coal. The Gibbs energy of the two kinds of fuels is fully used. Benefitting from the chemical looping process, 27% CO2 can be captured without energy penalty. With the same outputs of methanol and electricity, the energy savings ratio of the new system is about 12%. Based on the exergy analyses, it is disclosed that the integration of synthetic utilization of natural gas and coal plays a significant role in reducing the exergy destruction of the new system. The promising results obtained in this paper may lead to a clean coal technology that will utilize natural gas and coal more efficiently and economically.

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“…In order to improve the efficiency of the additives, theoretical analyses explain the interactive mechanism, co-crystallization, nucleation, or improved wax solubility [15,16]. The wax deposition inhibitors are polymeric compounds constituted by a hydrocarbon chain which provides the interaction between the additive and paraffin, and a polar segment that is responsible for the wax crystals morphology modification necessary to inhibit the aggregation stage.…”

Section: Introductionmentioning

confidence: 99%

Studies on the Influence of Polymeric Additives as Flow Improvers for Waxy Crude Oil

Al-Shafy¹

2014

IOSRJEN

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-Several techniques have been used to minimize the problems caused by the wax deposition, and the continuous addition of polymeric inhibitors is considered an attractive technological alternative. The copolymer of ethylene acrylic acid, PEAA, was esterified with 1-Docosonol to produce ester copolymer. The produced ester was grafted with vinyl acetate monomer (30 %) to produce graft ester, PEAA-DcA-g-VA. The products were purified and characterized by FT-IR and 1 HNMR. The behaviors of crude oils as flow improvers (rheological measurements and pour point depressant) onto Khalda Petroleum Co. (KhPC), Sumpetco and Salam Base crude oils were evaluated. The shear rate-shear stress and shear rate-apparent viscosity were measured at different concentration (from 500 to 3000 ppm) and temperatures below, equal and above the pour point temperature (15, 24 and 30 o C). A correlation between both results was also obtained. The evaluations of the efficiency of these copolymers as pour point depressants for tested crude oil using 500 to 3000 ppm from the prepared samples were studied. The pour point measurements show good reduction of pour point temperature from 27 to 6 o C depending on the composition and location of tested crude oil. The results were shown that, the prepared graft copolymers can used as flow improvers.

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Low-temperature methanol synthesis in a circulating slurry bubble reactor

Cited by 38 publications

References 14 publications

Low Temperature Methanol Synthesis in Slurry Phase With a Hybrid Copper-Formate System

Low Temperature Methanol Synthesis in Slurry Phase With a Hybrid Copper-Formate System

A Polygeneration System Based on Multi-Input Chemical Looping Combustion

Studies on the Influence of Polymeric Additives as Flow Improvers for Waxy Crude Oil

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