Hydrochlorination in Polysilicon Production
How metallurgical-grade silicon reacts with HCl to form trichlorosilane — the critical first conversion step. Covers reactor types, catalyst, temperature trade-offs, and STC co-production.
Read the guide →
Process Guides
Process Guide
Process Guide
Process Guide
Process Guide
Process Guide
Training
NEXARSiL Services
The polysilicon production chain — covered end to end.
Each guide covers one major process unit in depth: chemistry, equipment, key operating variables, and the trade-offs that matter at commercial scale.
Step 1
MG-Si & HCl Feed
Step 2
Hydrochlorination
Step 3
TCS Purification
Step 4
Siemens CVD
Step 5
Off-Gas Recovery & Recycle
TCS Purification & Distillation
Multi-column distillation to remove boron, phosphorus, metals, and dopants from trichlorosilane — the primary lever for achieving 9N to 11N purity. Covers column design, separation challenges, and OPEX drivers.
Read the guide →The Siemens CVD Process
How TCS and hydrogen deposit silicon on heated filaments to grow high-purity polysilicon rods. Covers reactor design, deposition variables, energy intensity, and why Siemens dominates commercial production.
Read the guide →Fluidized Bed Reactor (FBR) Technology
The continuous alternative to batch Siemens CVD — granular product, different energy profile, different contamination challenges. Covers deposition chemistry, seed management, and the Siemens vs. FBR trade-off.
Read the guide →Construction Quality & Cleanliness
The unglamorous work that determines whether a plant can ever reach Electronic Grade output. Weld class, pickling, passivation, purge protection, and cleanliness class requirements explained.
Read the guide →Polysilicon Operator Training
A structured 60–120 day operator readiness program covering process fundamentals, safe startup and shutdown, upset recognition, and certification — for new plants and post-turnaround restarts.
View the program →Free Download · Updated April 2026
11 Questions Before Signing a Polysilicon Technology Agreement
A practical checklist for plant owners, project developers, and procurement teams evaluating polysilicon technology agreements. Know what to demand from any licensor before signing.
Download Free Checklist →📋
Technical knowledge backed by independent advisory services.
Every guide in this library reflects hands-on experience inside operating polysilicon plants. Our advisory services apply that same depth to your specific project.
01
Technology Evaluation
Independent, vendor-neutral comparison of polysilicon technologies and licensors against your project objectives.
02
Feasibility Studies
Bankable pre-feasibility and feasibility studies covering technology, CAPEX, OPEX, schedule, and risk.
03
Owner's Engineering
Full owner-side representation across FEED, detailed engineering, procurement, construction, and commissioning.
04
Technology Package
NEXARSiL's own licensed polysilicon process — a complete, proven technology base for owners who want one accountable partner.
05
Plant Design Review
Deep technical review of plant layout, unit configuration, operability, and maintainability before errors reach construction.
06
CAPEX Optimization
Challenge every major cost driver — strip out over-design without compromising safety, quality, or schedule.