Enhanced hydrogen production from thermochemical processes

Abstract

This paper reviews the advances of enhanced thermo-chemical processes applying H2-selective membrane reactors and in situ CO2 capture for selective H2 production.

Structural and kinetic analysis of CO2 sorption on NaNO2-promoted MgO at moderate temperatures

“…More recently, calcium-based materials and ceramic sorbents which have high-capacity CO 2 uptake at elevated temperatures (>400 °C), are also being explored [11]. However, in pre-combustion capture systems (gasification or natural gas reforming), solid sorbents at intermediate temperatures (250-400 °C) offer a lower energy penalty than low-temperature aqueous amines, as they avoid the process of cooling and reheating the regeneration step [12]. Moreover, in situ CO 2 uptake can produce high-purity hydrogen during the sorption-enhanced water gas shift process [9].…”

Biohydrogen production beyond the Thauer limit by precision design of artificial microbial consortia

“…The H 2 production characteristics of this defined artificial consortium is superior compared to any mono-, co-or multi-culture system reported to date. The system could be further improved to enhance H 2 production by introducing other microorganisms into the consortium, and the stability of the system can be boosted by H 2 milking technology 69,70 , or can be combined with methanogenic archaea to stimulate syntrophic growth. Moreover, precision design of an artificial microbial consortium could even serve as a template for conversion of cellulosic biomass to gaseous and liquid biofuels.…”

Catalytic Toluene Reforming with In Situ CO2 Capture via an Iron–Calcium Hybrid Absorbent for Promoted Hydrogen Production

“…Calcium looping gasification can use renewable biomass to produce syngas rich in hydrogen (H 2 ) and simultaneously obtain flue gas with high concentration CO 2 that is convenient for subsequent transportation and sequestration . Calcium looping gasification technology can not only be used in an integrated gasification combined cycle (IGCC) plant or combine fuel cell to build advanced energy system, but also play an important role in combating climate change .…”

“…Coupling tar catalysis component with CaO to prepare hybrid material with promoted tar reduction reactivity is considered as a promising direction to develop novel CaO‐based absorbent . Biomass tar catalysts include dolomite, olivine, various metal‐based catalysts, activated carbon, etc .…”