Syngas to light olefin synthesis over La doped Zn_xAl_yO_z composite and SAPO-34 hybrid catalysts

Abstract

The direct transformation of syngas to light olefins is a highly attractive route for the synthesis of light olefins. The La doped ZnxAlyOz catalyst was prepared with various precipitating agents,...

Study on the catalytic performance of ZnCrAl co-precipitated oxides washed with ammonium carbonate solution in the synthesis of light olefins from syngas

“…When Zn x Al y O z oxides were created using different precipitating agents, Raveendra et al discovered that the oxides prepared with NH 3 ÁH 2 O as the precipitating agent had stronger catalytic effects. 20 This finding implies that different oxides are appropriate for different acid-base characteristics. In the same way, Yang et al found that the GaMnOx oxides they made using NH 3 ÁH 2 O worked better as a catalyst when mixed with SAPO-34.…”

Recent advances in biomass-derived platform chemicals to valeric acid synthesis

“…In the petrochemical industry, methanol and lower olefins such as ethylene, propylene, and butylene, and aromatics like benzene, toluene, and xylene are produced as main chemicals and then further converted into industrial products. [2][3][4][5][6][7] The world's utilization of fossil fuels and chemicals which are derived from non-replaceable petroleum resources has increased remarkably. The depletion of fossil fuels and hydrocarbons increases environmental pollution and the emission of CO 2 into the atmosphere, which leads to climate change.…”

Rational Design of SAPO-34 Zeolite in Bifunctional Catalysts for Syngas Conversion into Light Olefins

“…Fischer–Tropsch synthesis (FTS) is a traditional strategy to convert syngas into hydrocarbons over Fe and Co catalysts; however, the Anderson–Schulz–Flory (ASF) model in FTS limits the selectivity of C 2–4 hydrocarbons (including olefins and paraffins), which is no more than 58%. , Recently, an elegant oxide–zeolite (OX-ZEO) route was proposed to selectively convert syngas into olefins (STO), liquid fuels and aromatics depending on the topologies of the zeolites, , which breaks the ASF distribution in FTS. A number of metal oxides, such as ZnCrO x , , Zn–ZrO 2 , , ZnAlO x ,, and MnGaO x , − and several kinds of zeolites, including SAPO-34, − SAPO-18, , AlPO-18, and SSZ-13, , have been intensively studied. In such an OX-ZEO catalyst system, the metal oxide is responsible for the syngas activation to generate intermediates like methanol and ketene, while the zeolite plays the role in tandem conversion of intermediates to target products .…”