Investigations into enhanced wax production with combustion synthesized Fischer–Tropsch catalysts

Ail, Snehesh Shivananda; Dasappa, S.

doi:10.1016/j.enconman.2016.02.075

Cited by 23 publications

(23 citation statements)

References 56 publications

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“…As catalyst supports, they offer several advantages like high surface area, versatile and adjustable pore size distribution and surface functional groups, reductive properties and the possibility of recover the active metals from the deactivated catalysts by burning off the carbonaceous matrix (Serp and Figueiredo, 2009 ). Moreover, it has been observed that an inert material like carbon can reduce the metal-support interactions that are predominantly present in the conventional supports (e.g., Al 2 O 3 , SiO 2 , TiO 2 ), resulting in a potential increase of the catalytic conversion efficiencies (Ail and Dasappa, 2016 ). Considering the physicochemical similarities of gasification char and AC, also char could be included in this wide spectrum of materials.…”

Section: Introductionmentioning

confidence: 99%

Valorization of Char From Biomass Gasification as Catalyst Support in Dry Reforming of Methane

2019

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This study responds to the need of finding innovative routes for valorizing char derived from biomass gasification. Char is currently treated as a waste representing an energetic and economic loss for plant owners. However, it displays many similarities to activated carbon (AC) and could replace it in several applications. In this regard, the current work investigates the use of gasification derived char as catalyst support in dry reforming of methane (DRM) reactions. Char collected from a commercial biomass gasifier currently in operation was characterized and employed for the synthesis of cobalt catalysts. The catalysts were characterized and tested in an atmospheric pressure fixed bed reactor operating at 850°C with CH4:CO2 = 1 and a weight hourly space velocity of 6,500 mL g−1 h−1. The effectiveness of the synthesized catalysts was defined based on CO2 and CH4 conversions, the corresponding H2 and CO yields and their stability. Accordingly, catalysts were synthesized with cobalt loading of 10, 15 and 20 wt.% on untreated and HNO3 treated char, and the catalyst with optimum comparative performance was promoted with 2 wt.%MgO. Catalysts prepared using untreated char showed low average conversions of 23 and 17% for CO2 and CH4, yields of 1 and 14% for H2 and CO, and deactivated after few minutes of operation. Higher metal loadings corresponded to lower conversion and yields. Although HNO3 treatment slightly increased conversions and yields and enhanced the stability of the catalyst, the catalyst deactivated again after few minutes. On the contrary, MgO addition boosted the catalyst performances leading to conversions (95 and 94% for CO2 and CH4) and yields (44 and 53% for H2 and CO) similar to what obtained using conventional supports such as Al2O3. Moreover, MgO catalysts proved to be very stable during the whole duration of the test.

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Section: Introductionmentioning

confidence: 99%

Valorization of Char From Biomass Gasification as Catalyst Support in Dry Reforming of Methane

2019

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“…While parallel research has investigated the optimization of the reforming process [11], the focus of this paper is on FTS. Although FTS is a well-established technique, it is only recently that the conversion of biomass-derived syngas to liquid fuels via FT has become an area of research interest [14]. A key advantage of FT liquid transportation fuels is that they can directly replace the fossil fuel equivalent, and thus do not affect efficiencies or require changes to existing vehicles [14].…”

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confidence: 99%

“…Although FTS is a well-established technique, it is only recently that the conversion of biomass-derived syngas to liquid fuels via FT has become an area of research interest [14]. A key advantage of FT liquid transportation fuels is that they can directly replace the fossil fuel equivalent, and thus do not affect efficiencies or require changes to existing vehicles [14]. There is a large existing market for oil products in the EU; 595 Mtoe of oil was used in the EU28 in 2016, with the transport sector, which is 94% dependent on oil, accounting for 48% of this [15].In general, FT products are characterized with a broad carbon distribution (C 1 to C 30+ ).…”

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confidence: 99%

“…Agricultural, rather than large industrial, plants account for the majority of AD installations (70% in the EU) [10], and operation at ambient pressure is therefore a key factor for the practical application of biogas-to-liquids by FT on a typical AD plant. The aim of this paper is to investigate through laboratory experimentation the technical feasibility of the conversion of biogas-derived syngas to liquid fuels by FT at ambient pressure.FTS has been examined in multiple studies [14,[19][20][21][22], and it has been shown that pressure has a profound effect on the product selectivity of FT reactions [23]. Information on ambient pressure FT is, however, scarce in the literature, and focuses largely on the impact of the catalyst formulation on the reaction.…”

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confidence: 99%

“…FTS has been examined in multiple studies [14,[19][20][21][22], and it has been shown that pressure has a profound effect on the product selectivity of FT reactions [23]. Information on ambient pressure FT is, however, scarce in the literature, and focuses largely on the impact of the catalyst formulation on the reaction.…”

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Is the Fischer-Tropsch Conversion of Biogas-Derived Syngas to Liquid Fuels Feasible at Atmospheric Pressure?

et al. 2019

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Biogas resulting from anaerobic digestion can be utilized for the production of liquid fuels via reforming to syngas followed by the Fischer-Tropsch reaction. Renewable liquid fuels are highly desirable due to their potential for use in existing infrastructure, but current Fischer-Tropsch processes, which require operating pressures of 2–4 MPa (20–40 bar), are unsuitable for the relatively small scale of typical biogas production facilities in the EU, which are agriculture-based. This paper investigates the feasibility of producing liquid fuels from biogas-derived syngas at atmospheric pressure, with a focus on the system’s response to various interruption factors, such as total loss of feed gas, variations to feed ratio, and technical problems in the furnace. Results of laboratory testing showed that the liquid fuel selectivity could reach 60% under the studied conditions of 488 K (215 °C), H2/CO = 2 and 0.1 MPa (1 bar) over a commercial Fischer–Tropsch catalyst. Analysis indicated that the catalyst had two active sites for propagation, one site for the generation of methane and another for the production of liquid fuels and wax products. However, although the production of liquid fuels was verified at atmospheric pressure with high liquid fuel selectivity, the control of such a system to maintain activity is crucial. From an economic perspective, the system would require subsidies to achieve financial viability.

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Evaluation of the Fischer‐Tropsch synthesis product selectivity over iron‐based silica‐supported catalyst under mild temperatures

Stanke,

Lazdovica,

Laipniece

2023

Env Prog and Sustain Energy

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The circular economy is considered a keystone of sustainable development, and its implementation requires analyzing both product and by‐products, as well as process waste. In this study Fischer‐Tropsch synthesis product selectivity over Fe/SiO2 catalyst was investigated in the reaction temperature range of 240 to 300°C. The composition of the gas, liquid hydrocarbon, and wax products is discussed alongside the aqueous phase, which is rarely addressed. It was found that 280°C is the optimal temperature for condensable hydrocarbon production over Fe/SiO2 catalyst. The increase in reaction temperature led to a decrease in the selectivity of 1‐olefins and alcohols in the liquid hydrocarbon phase and waxes, but at the same time contributed to an increase in the content of alcohols in the aqueous phase products.

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Investigations into enhanced wax production with combustion synthesized Fischer–Tropsch catalysts

Cited by 23 publications

References 56 publications

Valorization of Char From Biomass Gasification as Catalyst Support in Dry Reforming of Methane

Valorization of Char From Biomass Gasification as Catalyst Support in Dry Reforming of Methane

Is the Fischer-Tropsch Conversion of Biogas-Derived Syngas to Liquid Fuels Feasible at Atmospheric Pressure?

Evaluation of the Fischer‐Tropsch synthesis product selectivity over iron‐based silica‐supported catalyst under mild temperatures

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