E4 Energy Services delivers patented technology to eliminate fugitive methane emissions, capture exhaust CO₂, and decarbonize natural gas compression — without shutting down your operations.
E4 Energy Services engineers and deploys next-generation emissions reduction products for natural gas compressors — combining patented mechanical innovation with proven field performance.
Our technology portfolio spans fugitive methane elimination, exhaust carbon capture, and fluid separation — all designed to retrofit existing assets without costly electric conversions.
See Our ProductsOur product suite addresses the full emissions profile of natural gas compression — from rod packing to exhaust gas, from wellhead to sales line. Each solution is modular, compact, and designed to retrofit existing infrastructure.
Externally pressurized dry gas packing using porous media technology. Nitrogen injection creates a gas film barrier — zero process gas fugitive emissions, zero oil contamination.
High-pressure gas distributed through porous piston media creates a frictionless non-contacting seal — eliminating cylinder lubrication entirely and supporting the full piston assembly.
Centrifugal cryogenic CO₂ separation from engine exhaust — no chemicals, supercritical liquid output at 1,100–5,000 psi. SOx, NOx, CO, and methane slip captured as product streams.
Presented at SPE ATCE October 2023. Optimizes compressor operations by intelligently managing hot gas recirculation to improve efficiency and reduce thermal emissions stress.
High-speed rotating separator turbine centrifugally forces liquid to the outer wall. Delivers sub-micron liquid-free gas through the top — modular and compact for any application.
Isentropic supersonic expansion stabilizes fuel Lower Heating Value and eliminates liquids from engine intake — extending cylinder life and optimizing combustion on raw well pad gas.
3-phase wellhead fluid separation (oil, water, gas) with integral oil stabilization compression. Delivers sub-atmospheric vapor pressure oil — zero flaring, lower CO₂e per BOE.
Ultra-high-speed positive displacement rotary technology. Exceptional power density and efficiency — forms the core of the ECC system's compression and expansion stages.
Cryogenic-rated rotary separation for CO₂ and acid gas streams. Operates at supercritical conditions — central component of the Exhaust Carbon Capture skid architecture.
The ECC skid is designed to match the footprint of a small to medium compressor package. All major high-speed components — including the CO₂ separator, Moving Wall Expander, and heat exchanger — mount on a single rotating shaft, minimizing complexity and maximizing uptime.
Using ultra-high-speed centrifugal separation, CO₂ is isolated from the exhaust stream without solvents or chemicals and discharged in supercritical liquid form at pipeline pressures. SOx, NOx, CO, and methane slip are simultaneously captured and released as separate product streams.
The system can also generate electrical power from waste heat via an integrated motor-generator, improving overall site economics.
Reciprocating compression is responsible for nearly 20% of total methane emissions in the oil and gas sector. Newly installed conventional rod packing can leak up to 60 CFH of process gas; worn packing exceeds 900 CFH. E4's solution eliminates this entirely.
High-pressure nitrogen is injected into two separate porous media packings that encapsulate the rod. A microscopic gas film forms between the rod surface and the media — only pure nitrogen escapes to atmosphere. On shutdown, the packing forms a tight, leak-free mechanical seal with no process gas release.
The complementary Oil-Free Piston Seals distribute high-pressure gas through porous media on the piston, creating a frictionless non-contacting interface that eliminates cylinder oil lubrication entirely.
The Axip-designed high-speed rotary scrubber provides superior gas-liquid separation in a compact, modular package. Fluid-laden gas enters through the bottom center and contacts a proprietary rotating separating turbine spinning at high velocity.
Centrifugal force drives liquid to the outer wall where it is discharged at high pressure. Liquid-free gas — cleansed to sub-micron particle levels — exits through the top center at line pressure. The modular design allows rapid deployment across wellhead, gathering, and compression applications.
The Moving Wall is a patented ultra-high-speed positive displacement rotary machine that functions as both a compressor and an expander. Its design delivers exceptional power density — far exceeding conventional rotary technologies at equivalent shaft speeds.
As the core mechanical component of the ECC system, the Moving Wall Expander recovers energy from the cryogenic CO₂ separation process while the Moving Wall Compressor drives the supercritical output stage — all on a shared rotating shaft.
The ECC system's heat exchanger is custom-sized to each installation's exhaust temperatures and volumes. Fabricated using additive manufacturing with a lattice-optimized geometry, the design increases thermal power exchange by more than 85% compared to conventional heat exchangers in a dramatically more compact form factor.
The design operates across both high-temperature exhaust conditions and cryogenic separation stages within the same skid — eliminating the need for separate heat management equipment.
Regulatory changes have dramatically improved the economics of carbon capture for compression operators. The IRA raised 45Q credits and lowered the minimum threshold — making E4's ECC system economically compelling for mid-size stations.
Electric drive conversion requires infrastructure investment, ongoing electricity cost, and generates no carbon credit revenue. E4's ECC system retrofits existing engines, generates 45Q credits, and can produce electricity from waste heat — improving net economics without replacing assets.
Exhaust capture piping is analogous to standard waste heat recovery installations. Pilot data collected at active compressor stations.
E4's technology has attracted attention across the full natural gas value chain — from major producers to OEM engine manufacturers and midstream operators.
NDAs in place with select parties. INNIO / Waukesha has committed $500K–$700K toward component testing and pilot participation.
Whether you're evaluating a pilot program, exploring 45Q credit opportunities, or want to understand how E4 technology integrates with your existing assets — we'd like to hear from you.