Biosugarcane-based carbon support for high-performance iron-based Fischer-Tropsch synthesis

Abstract

Exploiting new carbon supports with adjustable metal-support interaction and low price is of prime importance to realize the maximum active iron efficiency and industrial-scale application of Fe-based catalysts for Fischer-Tropsch synthesis (FTS). Herein, a simple, tunable, and scalable biochar support derived from the sugarcane bagasse was successfully prepared and was first used for FTS. The metal-support interaction was precisely controlled by functional groups of biosugarcane-based carbon material and different iron species sizes. All catalysts synthesized displayed high activities, and the iron-time-yield of Fe 4 /C bio even reached 1,198.9 mmol g Fe À1 s À1 . This performance was due to the unique structure and characteristics of the biosugarcane-based carbon support, which possessed abundant CÀO, C=O (h 1 (O) and h 2 (C, O)) functional groups, thus endowing the moderate metal-support interaction, high dispersion of active iron species, more active ε-Fe 2 C phase, and, most importantly, a high proportion of Fe x C/Fe surf , facilitating the maximum iron efficiency and intrinsic activity of the catalyst.

Direct Construction of K-Fe3C@C Nanohybrids Utilizing Waste Biomass of Pomelo Peel as High-Performance Fischer–Tropsch Catalysts

“…Two obvious peaks located at ~724.7 and ~711.2 eV corresponded to Fe 3 O 4 in the final product of K-Fe 3 C@C nanohybrids, indicating the occurrence of surface oxidation due to air exposure [39,40]. Meanwhile, it was noteworthy that other coexistent peaks at ~720.1 eV and ~707.4 eV belonged to Fe 3 C species, according to the previous studies, which agreed well with the above XRD analysis [41]. Additionally, Mössbauer spectroscopy was employed for identifying and quantifying the exact phase compositions of iron species (Figure 2 and Table 1).…”

“…The high performance for FTS was ascribed to the core-shell nanostructure composed of an Fe 3 C active phase encapsulated by graphitized carbon shells [46,47]. Most importantly, the excellent olefin selectivity of the Fe@C-1.0 catalyst was explicitly relevant to the intrinsic organic and inorganic chemical compositions in pomelo peel, accumulating in the plant growth process [41,48]. After 24 h of the FTS reaction, the θ-Fe 3 C active phase in the spent catalyst had no considerable transformation, characterized by XRD, FTIR, XPS and TEM in Figure S8 and Table S7.…”

Effects of Rare Earth Metal Promotion over Zeolite-Supported Fe–Cu-Based Catalysts on the Light Olefin Production Performance in Fischer–Tropsch Synthesis

“…Therefore, two zeolites (USY and MOR) with different structures, porous networks, and Si/Al ratios were selected. To show the functionality of the zeolite as a support material, an additional catalyst was prepared using activated carbon (AC) as support because of its high specific surface area, its inert surface, and especially its weak interaction with the active metals. , Rapid olefin production performance screening of the zeolite-supported 24 catalysts was conducted using a high-throughput catalyst performance analysis (HT-CPA) test system that operates at atmospheric pressure. High-throughput techniques have been successfully used for the development and discovery of new catalysts in the last decade, as they allow for high-speed performance screening of catalysts. , However, the high-throughput catalyst screening technique has not been explored for FT-Olefin synthesis yet.…”

Preparation of Nitrogen Doped Biochar-Based Iron Catalyst for Enhancing Gasoline-Range Hydrocarbons Production

“…Biochar prepared from several lignocellulosic wastes is an excellent candidate to meet the requirement of low raw material cost and achieve the goals of green chemistry and waste utilization. , Sugar cane bagasse acting as a typical agricultural biochar is used widely as a promising carbon material in the field of gas capture and supercapacitor due to its hierarchical pore structure and exposed functional groups. , In the previous study, we prepared a biosugar-cane-based Fe/C catalyst, which displayed a superhigh FTS activity (FTY up to 1198.9 mmol g Fe –1 s –1 ) and excellent stability (TOS = 150 h) . However, the product distribution was concentrated in undesired methane and short-chain hydrocarbons.…”

“…26,27 In the previous study, we prepared a biosugar-cane-based catalyst, which displayed a superhigh FTS activity (FTY up to 1198.9 mmol g Fe −1 s −1 ) and excellent stability (TOS = 150 h). 28 However, the product distribution was concentrated in undesired methane and short-chain hydrocarbons. The modification of nitrogen doping may be an efficient strategy to improve the product selectivity of long-chain hydrocarbons over the biosugar-cane-based Fe/C catalyst, which is not focused in the previous work.…”