Abstract: A process for obtaining light olefins from a hydrocarbonaceous feedstock comprising a polymer recyclate, a polyol, a biomass composition, or a combination thereof. A process comprising contacting the hydrocarbonaceous feedstock with a small pore size zeolite catalyst in a reaction zone under pyrolysis conditions to produce a product stream comprising ethylene and/or propylene and aromatics. The hydrocarbonaceous feedstock is subjected to first pyrolysis conditions in a first reaction zone to produce a first reaction product. The first reaction product is then contacted with a small pore size zeolite catalyst in a second reaction zone under second pyrolysis conditions sufficient produce a second reaction product comprising ethylene and/or propylene and less than or equal to 8 wt % aromatics, based on the weight of the product stream. A hydrocarbonaceous waste stream is pretreated to produce the hydrocarbonaceous feedstock having a reduced content of contaminants harmful to zeolite catalysts.

Abstract: A process for making a porous catalyst, comprises a) providing an aqueous solution containing a nanoparticle precursor, b) forming a composition containing nanoparticles, c) adding a first catalytic component or precursor thereof and a pore-forming agent to the composition containing nanoparticles and allowing the first catalytic component, the pore-forming agent, and the nanoparticles form an organic-inorganic structure, d) removing water from the organic-inorganic structure; and e) removing the pore-forming agent from the organic-inorganic structure so as to yield a porous catalyst.