Dataset Information

Tuning reactivity of Fischer-Tropsch synthesis by regulating TiO_x overlayer over Ru/TiO₂ nanocatalysts.

ABSTRACT: The activity of Fischer-Tropsch synthesis (FTS) on metal-based nanocatalysts can be greatly promoted by the support of reducible oxides, while the role of support remains elusive. Herein, by varying the reduction condition to regulate the TiO_x overlayer on Ru nanocatalysts, the reactivity of Ru/TiO₂ nanocatalysts can be differentially modulated. The activity in FTS shows a volcano-like trend with increasing reduction temperature from 200 to 600?°C. Such a variation of activity is characterized to be related to the activation of CO on the TiO_x overlayer at Ru/TiO₂ interfaces. Further theoretical calculations suggest that the formation of reduced TiO_x occurs facilely on the Ru surface, and it involves in the catalytic mechanism of FTS to facilitate the CO bond cleavage kinetically. This study provides a deep insight on the mechanism of TiO_x overlayer in FTS, and offers an effective approach to tuning catalytic reactivity of metal nanocatalysts on reducible oxides.

SUBMITTER: Zhang Y

PROVIDER: S-EPMC7314765 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature

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Tuning reactivity of Fischer-Tropsch synthesis by regulating TiOx overlayer over Ru/TiO2 nanocatalysts.

Zhang Yaru Y Yang Xiaoli X Yang Xiaofeng X Duan Hongmin H Qi Haifeng H Su Yang Y Liang Binglian B Tao Huabing H Liu Bin B Chen De Su Xiong X Huang Yanqiang Y Zhang Tao T

Nature communications 20200624 1

The activity of Fischer-Tropsch synthesis (FTS) on metal-based nanocatalysts can be greatly promoted by the support of reducible oxides, while the role of support remains elusive. Herein, by varying the reduction condition to regulate the TiOx overlayer on Ru nanocatalysts, the reactivity of Ru/TiO2 nanocatalysts can be differentially modulated. The activity in FTS shows a volcano-like trend with increasing reduction temperature from 200 to 600 °C. Such a variation of activ ...[more]

PMID: 32581251

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Project description:Renewable liquid fuels production from landfill waste provides a promising alternative to conventional carbon-intensive waste management methods and has the potential to contribute to the transition toward low-carbon fuel pathways. In this work, we investigated the life cycle greenhouse gas (GHG) emissions of producing Fischer-Tropsch diesel from landfill gas (LFG) using the TriFTS catalytic conversion process and compared it to fossil-based petroleum diesel. A life cycle-based comparison was made between TriFTS diesel and other LFG waste management pathways, LFG-to-Electricity and LFG-to-Compressed renewable natural gas (RNG), on a per kilogram of feedstock basis as well as on a per MJ of energy basis, which also included the LFG-to-Direct Combustion pathway. The study considered flaring of LFG as the common underlying counterfactual scenario for all of the waste-to-energy product pathways. We estimated the life cycle GHG emissions for TriFTS diesel to be -36.4 carbon dioxide equivalent (grams CO2e)/MJ which is significantly lower than its fossil fuel counterpart which was estimated to be 90.5 g CO2e/MJ on a cradle-to-grave basis. The life cycle emission results from both perspectives (per kg feedstock and per MJ energy output) show that TriFTS diesel is a viable alternative energy pathway from LFG when compared to other pathways, primarily due to the main product being a renewable fuel that can serve as a drop-in fuel for diesel-based uses, within both the waste industry as well as the larger market. Further sensitivity analysis was performed based on the production of TriFTS diesel with the counterfactual waste management scenario of LFG-to-Flaring as well as the alternative LFG-to-Electricity waste management pathway. The sensitivity of the carbon intensity for TriFTS diesel to flaring efficiency and the carbon intensity of the electricity grid were also investigated. The study highlights the potential for the TriFTS conversion process technology to contribute to the waste industry's closed loop and decarbonization initiatives and to provide low carbon fuel for transportation.

Dataset Information

Tuning reactivity of Fischer-Tropsch synthesis by regulating TiO_x overlayer over Ru/TiO₂ nanocatalysts.

Publications

Tuning reactivity of Fischer-Tropsch synthesis by regulating TiO<sub>x</sub> overlayer over Ru/TiO<sub>2</sub> nanocatalysts.

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