Towards the Development of Syngas/Biomethane Electrolytic Production, Using Liquefied Biomass and Heterogeneous Catalyst

Abstract

This paper presents results on the research currently being carried out with the objective of developing new electrochemistry-based processes to produce renewable synthetic fuels from liquefied biomass. In the current research line, the gas mixtures obtained from the typical electrolysis are not separated into their components but rather are introduced into a reactor together with liquefied biomass, at atmospheric pressure and different temperatures, under acidified zeolite Y catalyst, to obtain synthesis gas. This gaseous mixture has several applications, like the production of synthetic 2nd generation biofuel (e. g., biomethane, biomethanol, bio-dimethyl ether, formic acid, etc.). The behaviour of operational parameters such as biomass content, temperature and the use of different amounts of acidified zeolite HY catalyst were investigated. In the performed tests, it was found that, in addition to the synthesis gas (hydrogen, oxygen, carbon monoxide and carbon dioxide), methane was also obtained. Therefore, this research is quite promising, and the most favourable results were obtained by carrying out the biomass test at 300 °C, together with 4% of acidified zeolite Y catalyst, which gives a methane volumetric concentration equal to 35%.

A Highly Active Au/In2O3-ZrO2 Catalyst for Selective Hydrogenation of CO2 to Methanol

“…Time-resolved in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS) were also conducted to gain the insights into CO 2 adsorption. As shown in Supplementary Materials Figure S5, the CO 2 interaction with Au/In 2 O 3 -ZrO 2 prefers to produce carbonate species rather than bicarbonate species due to the change of intensities [37]. The bicarbonate species disappears much faster after the Ar desorption, especially over the Au/In 2 O 3 sample.…”

Ionic liquid binary mixtures: Machine learning‐assisted modeling, solvent tailoring, process design, and optimization

“…In 2021, global coal consumption reached 160.1 exajoules (EJ), showing the highest increase (6.3%) since 2014 and accounting for 26.9% of primary energy consumption. 57,58 The coal coking process, known for its energy-intensive, high energy consumption, and high pollution risk nature, suffers from low energy efficiency and inefficient production practices. 59,60 One valuable byproduct of the coking process in coke production is raw coke oven gas, mainly composed of H 2 , CH 4 , CO, and minor amounts of CO 2 , O 2 , and N 2 .…”

Eletrólise da água na obtenção de hidrogénio

“…O gás de síntese foi inicialmente obtido num protótipo laboratorial de célula aberta 11 . Combinando este princípio base com um sistema catalítico foi possível melhorar a composição do gás de síntese, recorrendo ao processo de Sabatier e, posteriormente, desenvolver a obtenção de uma série de produtos químicos orgânicos, quer líquidos, quer gasosos, que podem ser utilizados como combustíveis ou então permitir a obtenção desses mesmos compostos para processamentos posteriores, energéticos ou não, como, por exemplo, em síntese química 9 , sendo que a fonte de biomassa que tem vindo a ser testada com sucesso, é biomassa liquefeita, proveniente de uma tecnologia de liquefação de resíduos florestais lenhosos (desenvolvida pelo IST) 12 , num protótipo de 1 kW. Este foi o ponto de partida que está, atualmente, a ser investigado no âmbito do projeto Clean Forest:…”