Provided herein are methane oxidation catalysts and methods of using said methane oxidation catalysts to reduce methane in a gas stream comprising methane and sulfur. Select methods of the present disclosure comprise contacting the gas stream with a methane oxidation catalyst comprising a support comprising alumina doped with silica, with platinum and palladium as active phases. The platinum and the palladium may comprise from about 1 wt % to about 10 wt % of the methane oxidation catalyst. The methane oxidation catalysts, methods and uses of the same may, in selected embodiments, exhibit improvements in resistance to sulfur poisoning over the prior art.

Provided herein are methane oxidation catalysts and methods of using said methane oxidation catalysts to reduce methane in a gas stream comprising methane and sulfur. Select methods of the present disclosure comprise contacting the gas stream with a methane oxidation catalyst comprising a support comprising alumina doped with ceria, with platinum and palladium as active phases. The platinum and the palladium may comprise from about 1 wt % to about 10 wt % of the methane oxidation catalyst. The methane oxidation catalysts, methods and uses of the same may in selected embodiments exhibit improvements in resistance to sulfur poisoning over the prior art.

The transportation of captured carbon from production sites to a destination at which it can be stored or used traditionally requires the carbon to be carried into a tanker truck for road transport, which is costly. Disclosed embodiments eliminate or reduce this cost by compressing the captured carbon into an existing natural gas pipeline. The existing network of pipelines can then be used to transport the captured carbon to a distant destination, while potentially picking up additional captured carbon along the way. In addition, a portion of the captured carbon at each production site may be redirected back to the engine of the compressor to enable higher power density and prevent knocking.

Provided herein is a methane oxidation catalyst having a support comprising alumina doped with lanthanum and comprising platinum and palladium as active phases. The platinum and palladium are present in the catalyst at an amount effective for producing an exhaust stream from a natural gas vehicle having reduced levels of methane. The catalyst disclosed herein may exhibit improvements in sulfur and water resistance.

Methods of contacting a fluid comprising a light hydrocarbon with a metal-organic framework adsorbent having bis(pyrazolyl) ethanediimine ligands and internal pores; adsorbing the fluid in at least a portion of the internal pores of the metal-organic framework thereby creating an adsorbed fluid; storing the adsorbed fluid in the internal pores of the metal-organic framework; and releasing the adsorbed fluid from the internal pores of the metal-organic framework, wherein the metal-organic framework adsorbent undertakes a reversible phase transition upon adsorbing the fluid. Systems of a metal-organic framework having bis(pyrazolyl) ethanediimine ligands and internal pores, wherein the metal-organic framework undertakes a reversible phase transition upon adsorption and desorption of a light hydrocarbon fluid; wherein the fluid is stored in the internal pores of the metal-organic framework.

The present invention relates to a catalytic material for treating an exhaust gas produced by a natural gas engine, which catalytic material comprises a molecular sieve and a platinum group metal (PGM) supported on the molecular sieve, wherein the molecular sieve has a framework comprising silicon, oxygen and germanium, and has a content of heteroatom T-atoms of about 0.20 mol %, wherein the germanium is present in an amount of from 15 to 20 mol %. The present invention further relates to a catalyst article and a compressed natural gas combustion and exhaust system.

A system, method, and apparatus for reducing emissions are provided. A system can include an aftertreatment system including a catalyst, and a controller coupled to the aftertreatment system. The controller is configured to: receive temperature data indicative of a temperature proximate to an inlet for the aftertreatment system; determine, based on the temperature data regarding the temperature proximate to the inlet for the aftertreatment system, a temperature of the catalyst after a predetermined duration subsequent to the received temperature data; receive reductant information regarding an estimate of stored reductant in a portion of the aftertreatment system; determine that the received reductant information regarding the estimate of stored reductant satisfies a threshold reductant value, the threshold reductant value corresponding with the temperature of the catalyst; and adjust, during the predetermined duration, reductant storage in the aftertreatment system based on the received reductant information satisfying the threshold reductant value.

An exemplary apparatus includes an inlet tube for receiving and distributing a first gas mixture, an outlet tube for collecting and discharging a treated gas mixture, inlet channels in fluid communication with the inlet tube each receiving a portion of the first gas mixture distributed from the inlet tube, and outlet channels in fluid communication with the outlet tube each supplying a portion of the treated gas mixture to the outlet tube. Each of the inlet channels is separated from an adjacent outlet channel by a metal partition wall facilitating heat exchange. The apparatus includes a catalyst block including incoming channels each in fluid communication with an inlet channel at one end of the incoming channel and outgoing channels each in fluid communication with an outlet channel at one end of the outgoing channel, and a common channel in fluid communication with the inlet channel and the outgoing channel.

An exhaust treatment system comprises a reactor chamber configured to be fluidly coupled to an exhaust outlet of an engine, a regeneration chamber adjacent the reactor chamber, a regeneration system fluidly coupled to the regeneration chamber that is configured to generate a flow of regeneration fluid in the regeneration chamber, a first catalyst block, and a second catalyst block. The first catalyst block and the second catalyst block are configured to oxidize unburnt hydrocarbons in an exhaust stream from the engine. The treatment system can also include a combustible fluid injector for injecting a combustible fluid to raise the temperature of the first catalyst block and second catalyst block to a reaction temperature during use.