Please use this identifier to cite or link to this item: http://localhost:8081/xmlui/handle/123456789/6167
Title: CATALYTIC HYDROGENATION OF CARBON DI-OXIDE
Authors: Upadhyay, Hemant Kumar
Keywords: CHEMICAL ENGINEERING;CATALYTIC HYDROGENATION;CARBON DI-OXIDE;GREEN HOUSE GAS
Issue Date: 1995
Abstract: Carbon dioxide is the most important "green house gas" which may cause global warming. Its concentration has ben increasing steadily due to ever-increasing energy usage of modern society. One estimate indicates that the CO2 concentration in the atmosphere will double from pre-industrial revolution levels by a year between about 2025 and 2075, which will affect the temperature of atmosphere. Therefore, not only to improve the climate conditions but also to solve the carbon resources problem. Various measures have been proposed to stabilize the atmospheric CO2 level which include chemical fixation and recycling the emitted CO2. Conversion of CO2 to Hydrocarbon by catalytic hydrogenation has been recognized as one of the most promising processes for this purpose. In this direction various studies have been carried out using different catalysts. Most of the studies have been conducted at elevated pressure. The products range from methane, carbon monoxide, C2+ hydrocarbon fractions to methanol and other oxygenated hydrocarbons. The present studies, therefore, were aimed at developing suitable catalyst for the conversion of C2 hydrocarbon (1) fractions at atmospheric pressure. C2 fraction mostly ethylene, is a very important chemical feed stock for a number of useful product. Since most of the studies reported in this field utilize SiO2' Al203 support, it was though desirable to study the performance of other supports such as Zr02, TiO2 including the cheaper materials as MgO. The activities of the nickel for the hydrogenation process has been well known. In the present study, the attempts have been made to improve the activity of Ni using other metals (especially from group VIII, a source for cheaper materials) for the conversion of CO2 to C2 fraction utilizing the best support screened. The studies therefore indicate a much better performance using 5% Ni0-2% Fe0/Zr02' The selectivity and yield both have been found to be superior in comparison to the recent studies of Nozaki et al. (1987) using Rh/Nb205 catalyst at atmospheric pressure.
URI: http://hdl.handle.net/123456789/6167
Other Identifiers: M.Tech
Research Supervisor/ Guide: Agarwal, V. K.
Chand, Shri
metadata.dc.type: M.Tech Dessertation
Appears in Collections:MASTERS' THESES (Chemical Engg)

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