Radial flow packed-bed bioreactors (rPBBs) overcome the transport limitations of static and axial-flow perfusion bioreactors and enable development of clinical-scale bioengineered tissues. We developed criteria to design rPBBs with uniform medium radial flux distribution along bioreactor length ensuring uniform construct perfusion. We report a mode...
Direct air capture can be based on an adsorption system, and the used sorbent (chemisorbents or physisorbents) influences process. In this work, two amine-functionalized sorbents, as chemisorbents, and three different metal organic frameworks, as physisorbents, are considered and compared in terms of some key performance indicators. This was carrie...
The enhanced oil shale pyrolysis in a moving bed with internals (MBI) by rapid preheating in a drop tube was developed to improve the quality of shale oil through reaction regulation in stages. Initially rapid preheating of oil shale in the upper drop tube endowed the generation of massive free radical fragments and volatile precursors, which would...
The enhanced oil shale pyrolysis in a moving bed with internals (MBI) by rapid preheating in a drop tube was developed to improve the quality of shale oil through reaction regulation in stages. Initially rapid preheating of oil shale in the upper drop tube endowed the generation of massive free radical fragments and volatile precursors, which would...
Coal pyrolysis and volatiles upgrading were intelligently coupled into an integrated reactor with two sections that enabled tar quality to be improved. The upper drop tube served as the rapid pyrolysis section to maximize the primary yield of tar. Subsequently, the pyrolysis char together with the released volatiles was introduced into the lower mo...
The traditional fixed-bed reactor design is usually not suitable for the low tube-to-particle diameter ratios (N = D/d
The traditional fixed-bed reactor design is usually not suitable for the low tube-to-particle diameter ratios (N = D/d
The reaction of NO with chars of sewage sludge, refuse derived fuel (RDF), and straw was investigated in a fixed bed reactor at temperatures from 800 to 900 degrees C and NO inlet concentrations from 400 to 1500 ppmv. The effect of ash forming elements in the chars was examined by comparing the reactivity of raw and demineralized chars. Compared to...
The reaction of NO with chars of sewage sludge, refuse derived fuel (RDF), and straw was investigated in a fixed bed reactor at temperatures from 800 to 900 degrees C and NO inlet concentrations from 400 to 1500 ppmv. The effect of ash forming elements in the chars was examined by comparing the reactivity of raw and demineralized chars. Compared to...
The conventional downdraft gasifier, when used with garden waste pellets (ash similar to 10%) as feedstock, exhibits formation of clinker due to hardening of softened ash, which results in discontinuous flame and intermittent operation. The design and operation protocol of the gasifier was appropriately modified to circumvent this problem. The effe...
