A laboratory-scale prototype windowed reactor using a fluidized bed of coal coke particles was tested for thermochemical gasification using concentrated Xe light radiation as an energy source. The fluidized-bed reactor, designed to be combined with a solar reflective tower or beam-down optics,...

Fe3O4 supported on cubic yttria-stabilized zirconia (Fe3O4/c-YSZ) is proposed as a promising redox material for the production of hydrogen from water via a thermochemical two-step water-splitting cycle. In this study, the evolution of oxygen and hydrogen during the cyclic reaction was examined...

Although several studies have examined why overall price levels are higher in richer countries, little is known about whether there is a similar relationship at the urban and city level across countries. This paper compares the price levels of cities in Sub-Saharan Africa with those of other...

This paper estimates slum residents' willingness to pay for formalized land tenure in Pune, India. In so doing, it offers evidence that the legal assurance of slum residents' occupancy of their lands could benefit them. Previous studies have discussed legal and non-legal factors that...

A two-step water splitting process using the ZnFe2O4/Zn/Fe3O4 reaction system was proposed for H2 generation utilizing concentrated solar heat. The mixture of Zn and Fe3O4 was heated to 873K in flowing steam with an Ar carrier gas, and the H2 gas was generated at 93.4% of the theoretical yield...

Ultrafine Ni(II)-ferrites (NiχFe3−χO4, χ = 0.14−1.0; UNFs) with a high reactivity for CO2 methanation have been synthesized by the hydrolysis of Ni2+, Fe2+ and Fe3+ ions at 60–90°C, followed by heating of the co-precipitates to 300°C. The crystallite sizes of the UNFs ranged from 14 to...

Catalytic reduction of CO2 with H2 was studied on Ni/SiO2, Ni1−χCuχ/SiO2 (χ = 0.05−0.9) and Cu/SiO2 in a closed circulating reaction system in order to obtain a highly active and selective catalyst for CO formation. The yield of CO from CO2 + H2 on Cu/SiO2 was about 60% and its...

Measuring global poverty requires two types of spatial price adjustments: inter-country price adjustment based on the international purchasing power parities (PPPs) and intra-country price adjustment to account for cost-of-living variations in different parts of a country, especially between...