The U.S. Department of Energy (DOE) Office of Fossil Energy is intensely promoting research and development of oxy-fuel combustion systems that employ oxygen, instead of air, for burning the fuel. The resulting flue gas primarily consists of H2O and CO2 that facilitates sequestration of CO2 or use it in a turbine to generate electricity, thereby leading to reduction in CO2 emissions. Also, as t...

Empty Fruit Bunches (EFB) are oil palm waste that has the potential as a source of bioenergy because it contains lignocellulose (cellulose, hemicellulose, and lignin) so can be converted into biofuel through thermal cracking, adsorption, distillation processes. Thermal cracking is decomposition chemical content biomass by utilizing heat without mixture oxygen at temperature 200oC–600oC. This st...

Currently, hydrogen is mainly generated by steam methane reforming, with significant CO2 emissions, thus exacerbating the greenhouse effect. This environmental concern promotes cracking, which represents one of most promising alternatives for production theoretical zero CO/CO2 emissions. Methane cracking has been intensively investigated using metallic and carbonaceous catalysts. Recently, rese...

In this work, we propose a superstructure optimization approach for the optimal design of an ethylene and propylene coproduction plant. We formulate that embeds ethane propane steam cracking technologies, dehydrogenation olefin metathesis processes. represent with Generalized Disjunctive Programming model, solve problem through custom implementation Logic-based Outer Approximation algorithm in ...

Syngas from biomass gasification is being developed for alternative feedstock in the chemical industry. Palm kernel shell which generated palm oil industry can be potentially used as raw material process. The purpose of this study was to investigate use modified natural zeolite catalysts steam shells. Mordenite type by acid leaching a tar cracking catalyst. Steam conducted at temperature range ...

Ethylene is an essential building block in the petrochemical industry and it almost exclusively produced via ethane steam cracking, a well-established albeit highly energy carbon dioxide intensive process. The oxidative dehydrogenation of promising alternative to cracking reactions due its exothermic nature, which decreases overall requirements footprint. need capital air separation unit for pr...

In this work, the effect of ash activated olivine on olefinic products cracking and aromatization was assessed. The experiments were carried out in Chalmers 2–4 MWth dual fluidized bed gasifier, where feedstock cracked using steam as fluidization agent, at a reaction temperature ca. 780–790 °C. Three activation states olivine, representing three consecutive days campaign, evaluated. changes per...

Article history: Received: 21.04.2014. Received in revised form: 02.07.2014. Accepted: 14.07.2014. Due to the high amount of carbon and diffusible hydrogen, high-strength wear-resistant steel NM360, which is widely used on excavating machinery, always tends to develop cold crack after welding. Heat affected zone (HAZ) is the weakest part in a welding joint and is the most probable location for ...