Higher alcohol synthesis from syngas over KCoMoP catalysts

Xu, Rulong; Li, Yunhua; Cao, Zhenggang; Zheng, Jinbao; Zhang, Nuowei; Chen, Binghui; Wang, Wenju

doi:10.1016/j.catcom.2014.03.015

Cited by 17 publications

(10 citation statements)

References 30 publications

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“…MoS 2 ‐based catalysts doped with alkali and transition metals were reported by Dow Chemicals in the 1980s for higher alcohols synthesis (HAS) from syngas , . Besides MoS 2 , Mo 2 C , MoO x , and MoP have been evaluated for HAS from syngas. However, MoS 2 ‐based catalysts are still the most competitive choice due to their lower selectivity to hydrocarbons compared with other Mo catalysts .…”

Section: Introductioncontrasting

confidence: 54%

Activated Carbon‐Supported Mo‐Co‐K Sulfide Catalysts for Synthesizing Higher Alcohols from CO₂

et al. 2019

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Activated carbon-supported Mo-Co-K sulfide catalysts, prepared by stepwise impregnation, were used in the synthesis of higher alcohols via CO 2 hydrogenation. The catalysts with varying Mo contents and defined K/Mo and Co/Mo molar ratios exhibited relatively high CO 2 conversions and high selectivity to total alcohols and C 2+ alcohols. Moreover, the influence of calcination conditions on the sulfidation states and catalytic performance was studied. The surface sulfur runoff of the supported catalysts can be effectively suppressed by online calcination. As a result, the selectivity to total alcohols and C 2+ alcohols can be improved.

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Section: Introductioncontrasting

confidence: 54%

Activated Carbon‐Supported Mo‐Co‐K Sulfide Catalysts for Synthesizing Higher Alcohols from CO₂

et al. 2019

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“…Fischer–Tropsch elements (Co, Ni, and Fe) are recognized as active centers for hydrocarbon formation, which facilitate CO dissociation and carbon chain growth in the CO hydrogenation reaction. As a result, much attention has been paid to Mo–Co, − Mo–Ni, − and Mo–Fe − bimetallic catalysts for HAS.…”

Section: Bimetallic Catalystsmentioning

confidence: 99%

“…In addition, the highly dispersed Co and Ni species can also enhance the carbon chain propagation, particularly in the C 1 to C 2 step. Xu et al alternatively investigated a K–Co–MoP/SiO 2 catalyst for HAS. X-ray diffraction (XRD) analysis revealed that the addition of Co to the MoP catalyst formed the CoMoP phase, accelerating the dispersion of catalytic components over the catalysts with improved CO conversion and HA selectivity.…”

Section: Bimetallic Catalystsmentioning

confidence: 99%

Active Centers of Catalysts for Higher Alcohol Synthesis from Syngas: A Review

et al. 2018

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The gradual depletion of oil resources and the necessity to reduce greenhouse gas emissions portray a concerning image of our contemporary security of liquid transportation fuels in the event of a global crisis. Despite a vast amount of natural gas resources that we have and the huge economic incentive, the conversion of gas to liquid fuels or chemicals is still very limited because of the high technological complexity and capital cost for facilities. However, with the anticipated depletion of liquid petroleum and the soaring price of crude oil, the conversion of natural gas to liquid feedstock or fuels will become more and more important. Higher alcohols are important feedstocks for the chemical and pharmaceutical industries and have wide applications as potential fuel additives or hydrogen carriers for fuel cells for clean energy delivery. There is a long-standing interest in the synthesis of higher alcohols from syngas, an important Fischer–Tropsch technology for natural gas conversion. The purpose of this review is to provide readers with an extensive account of catalytic synthesis of higher alcohols from syngas using various catalysts reviewed from a unique perspective: clarification of the active centers and reaction pathways. In light of the different sources providing the active centers, three major classes of catalysts in terms of monometallic, bimetallic, and trimetallic/multimetallic catalysts are systematically reviewed, and their respective performances are carefully compared. Finally, future works proposed to improve the catalyst design are described.

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“…The alkali-promoted transition metal sulfide catalysts, particularly disulfide molybdenum (MoS2), have been extensively studied, but are associated with low space-time-yield and poor selectivity at high temperatures where these catalysts are active [289,291]. Studies continue to increase productivity and selectivity to match those needed for commercial operation [289,291,293].…”

Section: Synthesis Of Oxygenatesmentioning

confidence: 98%

Methane emissions as energy reservoir: Context, scope, causes and mitigation strategies

Chai

Tonjes

Mahajan

2016

Progress in Energy and Combustion Science

105

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A B S T R A C TMethane (CH4) is now considered a bridge fuel between present fossil (carbon) economy and desired renewables and this energy molecule is projected to play an important role in the global energy mix well beyond 2035. The atmospheric warming potential of CH4 is 28-36 times, when averaged over a 100-year period, that of carbon dioxide (CO2) and this necessitates a close scrutiny of global CH4 emissions inventory. As the second most abundant greenhouse gas (GHG), the annual global CH4 emissions were 645 million metric tons (MMT), accounting for 14.3% of the global anthropogenic GHG emissions. Of this, five key anthropogenic sources: agriculture, coal, landfills, oil and gas operations and wastewater together emitted 68% of all CH4 emissions. Landfills are ranked as the third highest anthropogenic CH4 emission source, behind agriculture and coal mines, and emissions from the waste sector are expected to reach almost 800 million metric tons CO2 equivalent (MMTCO2e) in 2015.The two largest economies spewed out 42% (14% (US) and 28% (China)) of the world's total greenhouse gas (GHG) emissions; these two countries are also the largest producers of municipal solid waste (MSW). The United States averages 250 MMT of MSW annually, of which about 63% enters landfills. In 2015, there were 2434 landfills in the United States and CH4 from these landfills accounted for 138 MMTCO2e released into the atmosphere and represents 17.7% of all US CH4 emissions. China had 580 landfills and treated 105 MMT of MSW in 2013. Methane produced from landfills contributes about 13% of total CH4 emissions in China. Almost 50% of landfills in China did not install efficient LFG collection and utilization systems to make them manageable so a great deal of CH4 and CO2 are emitted without intervention. Recent data show that globally, 45 billion cubic meters (bcm) of CH4 or 282 million barrels of oil equivalent (boe) was annually released from landfills into the atmosphere. Managing methane emission from landfills is a global challenge, though China lags behind in managed landfills that contribute to adverse health effects on the population. Moreover, the rich organic content of MSW in China indicates that CH4 emissions there may be underestimated. The China unmanaged landfill scenario is further duplicated in developing as well as in least-developed countries.This review starts with a dialog on CH4 emissions and climate change and the chemical changes the CH4 molecule undergoes in the atmosphere (Section 1). Section 2 deals with identification of global CH4 emissions from key sources, particularly anthropogenic, among those are agriculture, coal mines, landfills, oil and gas operations and wastewater. Although each of these sources is descriptive on their own, the focus of Section 3 is on landfills with particular emphasis on the United States and China, two largest producers of waste. The quantitative measurement of CH4 emissions is still uncertain so Section 4 is devoted to various CH4 estimation models, such as United States Environm...

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Higher alcohol synthesis from syngas over KCoMoP catalysts

Cited by 17 publications

References 30 publications

Activated Carbon‐Supported Mo‐Co‐K Sulfide Catalysts for Synthesizing Higher Alcohols from CO₂

Activated Carbon‐Supported Mo‐Co‐K Sulfide Catalysts for Synthesizing Higher Alcohols from CO₂

Active Centers of Catalysts for Higher Alcohol Synthesis from Syngas: A Review

Methane emissions as energy reservoir: Context, scope, causes and mitigation strategies

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Higher alcohol synthesis from syngas over KCoMoP catalysts

Cited by 17 publications

References 30 publications

Activated Carbon‐Supported Mo‐Co‐K Sulfide Catalysts for Synthesizing Higher Alcohols from CO2

Activated Carbon‐Supported Mo‐Co‐K Sulfide Catalysts for Synthesizing Higher Alcohols from CO2

Active Centers of Catalysts for Higher Alcohol Synthesis from Syngas: A Review

Methane emissions as energy reservoir: Context, scope, causes and mitigation strategies

Contact Info

Product

Resources

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Activated Carbon‐Supported Mo‐Co‐K Sulfide Catalysts for Synthesizing Higher Alcohols from CO₂

Activated Carbon‐Supported Mo‐Co‐K Sulfide Catalysts for Synthesizing Higher Alcohols from CO₂