Effects of Cu/Fe ratio on structure and performance of attapulgite supported CuFeCo-based catalyst for mixed alcohols synthesis from syngas

Cetyltrimethylammonium Bromide‐Promoted, ZnO‐Supported, and Mn‐Promoted Cu–Fe Catalyst for the Hydrogenation of CO to Low‐Carbon Alcohols

“…Remarkably,t he diffraction peaks of Fe phase were not detected in the XRD patterns,w hich might be causedb yt he small amounta nd high dispersion of Fe. [19,25] Furthermore,i fMn was added to CuFe/ZnO,t he main diffraction peaks appeared at 2 q = 30.8, 35.9, 43.3, 53.9, 57.0, and 62.98,w hich correspond to ZnFe 2 O 4 and agree with previous research [26,27] and JCPDS 073-1923. Weak diffraction peaks at 2 q = 31.8, 38.7, 68.3, and 75.08 correspond to CuO (JCPDS 044-0706).…”

“…the modification of the dispersion of active sites and the metal-support interaction. [18,19] Ichikawa [20] illustrated that the alcohol distribution of aR h-based catalyst over ZrO 2 , TiO 2 ,L a 2 O 3 ,Z nO,a nd MgO supports varied widely,a nd the productsc onsisted mainly of alkane compounds if SiO 2 or Al 2 O 3 was the support. Sibilia et al [21] stated that botha lcohols and hydrocarbons were primary products of the Fe/Cu/ ZnO catalyst.…”

Activation and Decomposition of Methane over Cobalt‐, Copper‐, and Iron‐Based Heterogeneous Catalysts for COx‐Free Hydrogen and Multiwalled Carbon Nanotube Production

“…In the TPR profile of CuÀFe/Al 2 O 3 bimetallicc atalyst, one broad main peak with ar espective shoulder peak appeared within 200-450 8C, corresponding to the reduction of CuO to Cu, Fe 2 O 3 to Fe 3 O 4 , and overlapped CuFe 2 O 4 to Cu and Fe 2 O 3 . [27] Therew as no clear change in the reduction peak of the iron species on CuÀFe/Al 2 O 3 with regard to resultsr eported in the literature; [27a, 28] nonetheless, the reduction peaks of CuO shifted slightly towardh igher temperatures in comparison with those of the Cu/Al 2 O 3 catalyst. It could be considered that the decreasei nt he density of copper on the surface of Al 2 O 3 strengthened the interaction of metal and support, making the reduction of CuO more difficult in the case of bimetallic catalyst compared with the monometallic catalyst ( Figure S2 in the Supporting Information).…”

Interfacial Fe5C2-Cu catalysts toward low-pressure syngas conversion to long-chain alcohols

“…Synthesis of long-chain alcohols (LAS) from syngas by a tandem strategy provides a facile, economical, and environment-friendly approach 5–7 . Among various binary catalyst systems (Cu–Fe 1,3,8 , Cu–Co 9,10 , Co–Mo 11,12 ), Cu–Fe binary candidates have attracted considerable attention in the production of long-chain alcohols. Previous studies on Cu–Fe binary catalysts show that a yield of long-chain alcohol as high as 0.014–0.144 g g cat −1 h −1 could be reached, albeit a relatively harsh reaction condition (3–8 MPa) is normally required.…”

“…Previous studies on Cu–Fe binary catalysts show that a yield of long-chain alcohol as high as 0.014–0.144 g g cat −1 h −1 could be reached, albeit a relatively harsh reaction condition (3–8 MPa) is normally required. However, there is still room for the optimization of long-chain alcohols selectivity; more importantly, it is pivotal to develop catalyst system that works under mild reaction conditions 9–22 . Especially, the low pressure in practical operation gives a significant reduction in pressure drop, energy, and facility costs, which takes merits of both environmental and economic benefits 23,24 .…”