Hydrogen Production from Woody Biomass by Novel Gasification Using CO2 Sorbent

Thermodynamic analysis of hydrogen production from raw coke oven gas via steam reforming

“…In the presence of CO 2 sorbent, calcium oxide (CaO) was selected as CO 2 sorbent, due to the wide application of Cabased sorbent in the sorption-enhanced steam reforming process [20,[25][26][27][28][29]. As CO 2 sorbent, CaO mainly occurred with the following reaction [Eq.…”

“…As the S/RCOG ratio rose, the methane amount increased slightly, because the water addition accelerated the WGS reaction [Eq. (20)], increasing the hydrogen share and then displacing the equilibriums of Eqs. (2)(3)(4)(5) to the direction of methane production.…”

“…Ortiz et al performed the sorption-enhanced methane reforming study using Ca-based sorbent, and over 95 mol% hydrogen (dry basis) was obtained [19]. Hanaoka et al [20] found that the product gas contained no CO 2 when CaO as a CO 2 sorbent was added into the biomass gasification process, and the hydrogen yield in the presence of CaO was higher than those in the absence of CaO. Our team investigated sorption-enhanced bio-oil steam reforming process and obtained 93 % hydrogen concentration in the produced gas and found that the carbon deposition on the catalyst surface was obviously weakened [21,22].…”

Hydrogen production from biomass

“…More recently, experimental work has been carried out with the objective of producing H 2 from a variety of carbonaceous materials including natural gas, heavy oil and coal (Balasubramanian et al, 1999;Sato et al, 2003;Kuramoto et al, 2003;Lin et al, 2002Lin et al, , 2004. A promising preliminary investigation has also been reported using biomass (Hanaoka et al, 2005). However, the application of a CO 2 capture process to enhance H 2 production from biomass, which, simultaneously facilitates CO 2 sequestration, is a new objective.…”

“…There are also significant implications for reactor design and operation when using biomass fuels. Hanaoka et al (2005) conducted a preliminary investigation of the steam gasification of 'Japanese oak' with CaO using a pressurised batch reactor with an internal volume of 50 cm 3 . They identified the reaction temperature and pressure to be important operating variables.…”