Combined Mayenite-Based Calcium-Copper Materials for Ca-Cu Looping Technology: Powder Upscaling and Agglomerates

Westbye, Alexander; Aranda, Asunción; Dıetzel, Pascal D. C.; Meyer, Julien; Kazi, Saima Sultana; Felice, Luca Di

doi:10.2139/ssrn.3366205

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“…A theoretical calcined combined material composition of 20/40/40 wt % CaO/CuO/Ca 12 Al 14 O 33 with an active CuO/CaO = 2.0 [wt/wt] ratio using Cu(OH) 2 as CuO precursor was selected for upscaling based on favorable results and precursor cost. Synthesis scale-up to 100.0 g batches, as well as an agglomeration procedure, has been reported . The essential features of materials synthesis and agglomeration of the tested material are summarized here for ease of reference.…”

Section: Materials and Experimental Methodsmentioning

confidence: 99%

“…Synthesis scale-up to 100.0 g batches, as well as an agglomeration procedure, has been reported. 47 The essential features of materials synthesis and agglomeration of the tested material are summarized here for ease of reference.…”

Section: Introductionmentioning

confidence: 99%

“…Gas Control Techonolgies GHGT-14 Proceeding Press 2019]. Copyright [2018] [SSRN/ ALEXANDER WESTBYE] 47.…”

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confidence: 99%

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Fixed Bed Reactor Validation of a Mayenite Based Combined Calcium–Copper Material for Hydrogen Production through Ca–Cu Looping

Westbye

Sanchez

Grasa

et al. 2019

Ind. Eng. Chem. Res.

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For the first time, a mayenite based material combining calcium and copper (18.0/37.6/44.4 estimated active wt % CaO/CuO/Ca 12 Al 14 O 33 , CuO/CaO = 2.1 [wt/wt]) has been subjected to three full calcium−copper chemical looping combustion (Ca−Cu Looping) cycles in a fixed bed reactor (70.0 g of combined material and 3.5 g of 18.0 wt % Ni/Al 2 O 3 reforming catalyst), demonstrating the feasibility of a combined materials approach to hydrogen production through Ca−Cu Looping. Combined materials were characterized by helium pycnometry, mercury intrusion, nitrogen adsorption, X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, and energy dispersive X-ray diffraction before and after reactor testing. A carbon dioxide capture capacity of 14.6−15.0 g CO 2 /100 g (640−660 °C, 1.0 MPa, 2.5 kg CH 4 kg cat −1 h −1 ), full oxidation, and expected calcination efficiencies (51−64%) were obtained. Combined material performance is comparable to that of segregated materials previously tested in the same experimental rig. Process intensification of Ca−Cu Looping through combined materials development is promising. more widespread implementation and acceptance in the 49 industrial sector. 4 50 The topic of the presented work is hydrogen production 51 from natural gas with CCS, i.e., CO 2 capture from a stationary 52 point-source within the chemical industry. The annual global 53 production of hydrogen is approximately 65 Mt/year where 54 95% is produced from fossil fuels (48% from reforming of 55 natural gas) and the majority of hydrogen is "used where it's 56 produced" in refinery feedstock hydrotreatment or in the 57 production of miscellaneous commodity chemicals (ammonia, 58 methanol, etc.). 5,6 The associated CO 2 emissions for a large-59 scale, hydrogen producing natural gas reforming plant are 60 estimated to be in the order of 7.0−8.1 tCO 2 /tH 2 . 7,8 As an 61

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Section: Materials and Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%