Selective CO2 hydrogenation into methanol in a supercritical flow process

Pathway to a land-neutral expansion of Brazilian renewable fuel production

“…Understanding the cost and magnitudes of the required infrastructure is a key element for the implementation of the land-neutral methanol pathway. While hydrogenation of CO 2 to produce methanol has received significant attention in industry and academia 37 , including major R&D efforts in Brazil 38 , recent estimates of power-to-methanol processes show that they are significantly more costly than their fossil counterparts 39 , 40 . However, our proposed pathway includes important elements that can make green methanol more competitive: the size of H 2 and CO 2 storage is optimized to maximize capital utilization 41 , while the almost pure and low-cost CO 2 stream from the ethanol production process can further reduce the cost.…”

Zeolitic‐Imidazolate Framework Derived Intermetallic Nickel Zinc Carbide Material as a Selective Catalyst for CO2 to CO Reduction at High Pressure

“…To couple the RWGS and FTS processes in tandem, the two processes should be carried out at the same pressure, i. e., � 20-30 bar. However, higher operational pressures will favor the CO 2 methanation pathway, [5,9] which will increase the selectivity to CH 4 and will hinder the FTS pathway. Since Ni 3 ZnC@NC was able to carry out only the RWGS pathway at atmospheric pressure, its activity was also studied at high-pressure conditions to evaluate its suitability for a RWGS/FT tandem process.…”

“…[2] The conversion of CO 2 in industrial processes is restricted to few examples, such as the synthesis of urea, salicylic acid, carboxylic acids, methanol, organic carbonates, and polycarbonates. [3] Considerable progress has been made towards the hydrogenation of CO 2 to C1 products (e. g., CO, CH 4 , CH 3 OH, and HCOOH), [4,5] while the hydrogenation of CO 2 into high-value C 2 + products is still challenging. In this case, the key is developing more selective catalysts that will hinder C1 byproducts.…”

Diferentes Perspetivas para a Valorização de CO2 a Álcoois Utilizando Catálise Heterogénea

“…Por sua vez, a utilização de CO 2 supercrítico (scCO 2 ) (P c = 73 bar e 31 °C) não tem sido particularmente muito estudada na conversão de CO 2 a metanol através de catálise heterogénea. Evdokimenko et al [49] e Bogdan et al [50] relataram, respetivamente, a hidrogenação de CO 2 a monóxido de carbono e a metano em condições supercríticas utilizando diferentes catalisadores. Porém, nenhum dos autores estudou a reação abaixo do ponto crítico da mistura, e por isso estes estudos não permitem esclarecer por completo o efeito benéfico das condições supercríticas na taxa de conversão e seletividade.…”

“…Recentemente o nosso grupo descreveu um processo de fluxo em condições supercríticas utilizando o catalisador ReO x /TiO 2 (Figura 3) [50]. O uso de uma pressão elevada permitiu que este sistema convertesse uma apreciável quantidade de CO 2 quase exclusivamente em metanol.…”