Direct conversion of synthesis gas to light olefins using dual bed reactor

Park, Jo-Yong; Lee, Yun-Jo; Jun, Ki‐Won; Bae, Jong Wook; Viswanadham, Nagabhatla; Kim, Young Ho

doi:10.1016/j.jiec.2009.09.011

Cited by 32 publications

(15 citation statements)

References 26 publications

(12 reference statements)

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“…Furthermore, since the acidic sites on ZSM5 component could help to enhance C 2 -C 4 selectivity by the presence of olefin cracking activity of FTS products reported by our previous work [11], the selection of appropriate ZSM5 components (Si/Al = 25) on the iron-based Fischer-Tropsch catalyst is adopted in the present investigation to obtain high catalytic performance. The optimum weight ratio of Fe/Cu is found to be around 1/0.1 on bifunctional catalyst containing ZSM5 and the increase of K component in the coprecipitated iron-based FTS catalyst are mainly responsible for the enhanced olefin selectivity as reported in our previous works [7,8].…”

Section: Introductionsupporting

confidence: 68%

“…In 40FeZ catalyst, the a-Fe 2 O 3 lines are prominent with weak evidence for characteristic peaks of ZSM5. The observed fact that the intensity of characteristic lines of ZSM5 decreases can be explained by dilution effect of active component as well as loss of crystallinity of ZSM5 structure, and the latter being more likely due to the acidic preparation conditions [6][7][8][9][10]. It is interesting to discuss about lines near 2h = 9°in ZSM5 diffraction patterns.…”

Section: Xrd Studies Of Fe-cu-k/zsm5 Catalystsmentioning

confidence: 96%

“…In the development of iron-based catalyst, various preparation parameters such as the composition of active components, the nature of active metal precursors, the amount and characteristics of promoters such as K and Cu, the nature of acidic components such as ZSM-5 added, pH of precipitation and temperatures and calcination temperature of finished catalyst and so on need to be optimized to meet the production of targeted products from FTS reaction. On the optimized catalyst, the optimization of reaction parameters such as H 2 /CO molar ratio, temperature, space velocity etc have been intensively investigated to find out optimum reaction variables using iron-based catalyst [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…In the previous investigation, we have also reported the detailed studies on Fe-Cu-K/zeolites FTS catalysts with respect to its effects on reducibility, active phase formation such as surface carbides and its influence on catalyst performance such as CO conversion, water gas shift (WGS) activity and product distribution [6][7][8][9][10]. Furthermore, since the acidic sites on ZSM5 component could help to enhance C 2 -C 4 selectivity by the presence of olefin cracking activity of FTS products reported by our previous work [11], the selection of appropriate ZSM5 components (Si/Al = 25) on the iron-based Fischer-Tropsch catalyst is adopted in the present investigation to obtain high catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Active Component Contents to Catalytic Performance on Fe-Cu-K/ZSM5 Fischer-Tropsch Catalyst

et al. 2009

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Fischer-Tropsch Synthesis (FTS) on Fe-Cu-K/ ZSM5 catalysts prepared by varying the amount of active components for a given amount of ZSM5 has been investigated to elucidate the effects of iron concentration. The catalysts were prepared by conventional wet impregnation method using ZSM5 and subsequently calcined at 500°C for 5 h. The different catalytic performance is verified by the variation of microporosity such as surface area and pore size distribution of Fe-Cu-K/ZSM5, acidity, reducibility of active phases and the presence of various crystalline phases like a-Fe 2 O 3 , metallic iron and iron carbide. The characterization results are analyzed along with catalytic performance to arrive at optimum amount of active components and to obtain maximum selectivity of FTS products with high conversion of CO during FTS reaction.

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Section: Introductionsupporting

confidence: 68%

Section: Xrd Studies Of Fe-cu-k/zsm5 Catalystsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Active Component Contents to Catalytic Performance on Fe-Cu-K/ZSM5 Fischer-Tropsch Catalyst

et al. 2009

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“…Work at the Chinese Academy of Science Institute of Coal Chemistry and by Synfuels China not only explored the effects of other metal promoters such as Mn but also produced highly active, stable and selective catalysts from sulfur-containing precursors which traditionally have been avoided due to the strong poisoning behavior of sulfur [10,11]. Recent studies showed that there could be an optimal range of K loading on Fe-based FTS catalysts, since higher K loading generally resulted in higher carburization rate, though too much K would lead to excessive carbon deposition [12,13].…”

Section: Introductionmentioning

confidence: 99%

Iron Fischer-Tropsch Catalysts Prepared by Solvent-Deficient Precipitation (SDP): Effects of Washing, Promoter Addition Step, and Drying Temperature

et al. 2015

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Abstract:A novel, solvent-deficient precipitation (SDP) method for catalyst preparation in general and for preparation of iron FT catalysts in particular is reported. Eight catalysts using a 2 3 factorial design of experiments to identify the key preparation variables were prepared. The catalysts were characterized by electron microprobe, N2 adsorption, TEM, XRD, and ICP. Results show that the morphology of the catalysts, i.e., surface area, pore volume, pore size distribution, crystallite sizes, and promoter distribution are significantly influenced by (1) whether or not the precursor catalyst is washed, (2) the promoter addition step, and (3) the drying condition (temperature). Consequently, the activity, selectivity, and stability of the catalysts determined from fixed-bed testing are also affected by these three variables. Unwashed catalysts prepared by a one-step method and dried at 100 °C produced the most active catalysts for FT synthesis. The catalysts of this study prepared by SDP compared favorably in activity, productivity, and stability with Fe FT catalysts reported in the literature. It is believed that this facile SDP approach has promise for development of future FT catalysts, and also offers a potential alternate route for the preparation of other catalysts for various other applications.

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Can We Afford to Waste Carbon Dioxide? Carbon Dioxide as a Valuable Source of Carbon for the Production of Light Olefins

2011

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Concerns about climate change have increased the amount of activity on carbon capture and sequestration (CCS) as one of the solutions to the problem of rising levels of CO(2) in the troposphere, while the reuse of CO(2) (carbon capture and recycling; CCR) has only recently received more attention. CCR is focused on the possibility of using CO(2) as a cheap (or even negative-value) raw material. This Concept paper analyzes this possibility from a different perspective: In a sustainable vision, can we afford to waste CO(2) as a source of carbon in a changing world faced with a fast depletion of natural carbon sources and in need of a low-carbon, resource-efficient economy? One of the points emerging from this discussion concerns the use of CO(2) for the production of olefins (substituting into or integrating with current energy-intensive methodologies that start from oil or syngas from other fossil fuel resources) if H(2) from renewable resources were available at competitive costs. This offers an opportunity to accelerate the introduction of renewable energy into the chemical production chain, and thus to improve resource efficiency in this important manufacturing sector.

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Direct conversion of synthesis gas to light olefins using dual bed reactor

Cited by 32 publications

References 26 publications

Effect of Active Component Contents to Catalytic Performance on Fe-Cu-K/ZSM5 Fischer-Tropsch Catalyst

Effect of Active Component Contents to Catalytic Performance on Fe-Cu-K/ZSM5 Fischer-Tropsch Catalyst

Iron Fischer-Tropsch Catalysts Prepared by Solvent-Deficient Precipitation (SDP): Effects of Washing, Promoter Addition Step, and Drying Temperature

Can We Afford to Waste Carbon Dioxide? Carbon Dioxide as a Valuable Source of Carbon for the Production of Light Olefins

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