Researching Fe Catalyst Suitable for CO₂-Containing Syngas for Fischer−Tropsch Synthesis

Abstract

Fischer-Tropsch (FT) synthesis is a technology to produce liquid fuels from coal, natural gas, and biomass as an alternate to crude oil. However, the quantity of emitted CO 2 from the FT process consisting of syngas preparation, FT synthesis, and product workup is one of the serious disadvantages of FT process. The conversion of CO 2 into hydrocarbons is one of the promising methods to decrease CO 2 emissions. Effects of promoter addition on the activity of precipitated Fe catalysts for the conversion of CO 2 were studied using pure CO 2 and CO 2 -containing syngas feeds. The results suggested that CO 2 can be activated by suitable promoter(s) for hydrocarbon synthesis at low temperature. Low K content is suitable for increasing hydrocarbon yield. The Fe catalysts promoted by equal Zn and Cu have higher CO and CO 2 conversion and decreased CH 4 selectivity.

A Brief Review of Carbon Dioxide Hydrogenation to Methanol Over Copper and Iron Based Catalysts

“…Other additives such as Zn, Mg, Ru, Zr, and La have also been researched but promoting effect is nearly inappreciable [53,[61][62][63]. Iron based catalysts dispersed on various supports have also been tested extensively and the product distributions are highly dependent on supporting materials [53].…”

Subtask 3.4 - Fischer - Tropsch Fuels Development

“…Work by a number of researchers has shown that CO 2 can be incorporated into FT product using an iron-based catalyst (15)(16)(17)(18)22), but the catalyst tested by the EERC showed low productivity and rapid deactivation both in a pilot-scale reactor and in a more controlled laboratory-scale reactor when exposed to unsweetened syngas. High CO 2 concentration in bottled gas also had a negative impact on catalyst performance at low H 2 concentrations, but rapid catalyst deactivation was not apparent.…”

“…A number of researchers have studied the effects of CO 2 on FTS and have shown that ironbased FT catalysts can synthesize liquids from CO 2 (15)(16)(17)(18)(19)(20)(21)(22). The studies referenced used exclusively bottled gas for FTS in laboratory-scale reactors.…”

An Introductive Study about CO<sub>2</sub> Hydrogenation into Hydrocarbons Using Iron Catalysts

“…The activity of catalysts was tested in a stainless steel fixed bed reactor [12]. The catalyst diluted with four-fold quartz particle of equal size was filled into the reactor.…”

“…high temperature can promote CO 2 conversion to hydrocarbons via the series of Equations ( (1) and (2)). In order to find iron catalyst more active for CO 2 hydrogenation, we researched the influences of Zn, K and Cu on precipitated iron catalysts at low temperature (230˚C) [12] [16] [17].…”